{"id":3493,"date":"2026-04-30T05:32:43","date_gmt":"2026-04-30T05:32:43","guid":{"rendered":"https:\/\/multahost.com\/blog\/?p=3493"},"modified":"2026-04-30T05:53:20","modified_gmt":"2026-04-30T05:53:20","slug":"vos3000-ivr-inband-dtmf","status":"publish","type":"post","link":"https:\/\/multahost.com\/blog\/vos3000-ivr-inband-dtmf\/","title":{"rendered":"VOS3000 IVR Inband DTMF Detection Accurate Dual-Tone Recognition Setup"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"vos-3000-ivr-inband-dtmf-detection-accurate-dual-tone-recognition-setup\">VOS3000 IVR Inband DTMF Detection: Accurate Dual-Tone Recognition Setup<\/h1>\n\n\n\n<p>\ud83d\udcde When a caller presses a key on their phone keypad while interacting with your VOS3000 IVR menu, how does the system detect which digit was pressed? If RFC 2833 out-of-band DTMF is not negotiated with the endpoint, the IVR must rely on <strong>VOS3000 IVR inband DTMF detection<\/strong> \u2014 analyzing the audio stream to recognize dual-tone multi-frequency signals embedded within the voice path. Getting this setting right is critical for IVR menu navigation, PIN entry, and destination number collection. \ud83c\udfaf<\/p>\n\n\n\n<p>\ud83d\udccb According to the official VOS3000 V2.1.9.07 Manual, Section 4.3.5.3 (Audio Service Parameter), two parameters control inband DTMF detection: <strong>IVR_ENABLE_PARSE_INBAND<\/strong> (default: Off) \u2014 &#8220;Inband DTMF Analysis,&#8221; and <strong>IVR_ENABLE_PARSE_SECOND_INBAND<\/strong> (default: Off) \u2014 &#8220;Second Line Inband DTMF Analysis.&#8221; Both are Off by default, meaning inband DTMF detection is disabled unless explicitly enabled. \ud83d\udd04<\/p>\n\n\n\n<p>\ud83d\udd27 All data in this guide is sourced exclusively from the official VOS3000 V2.1.9.07 Manual, Section 4.3.5.3 \u2014 no fabricated values, no guesswork. For expert assistance with your VOS3000 deployment, contact us on WhatsApp at <strong>+8801911119966<\/strong>. \ud83d\udca1<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#vos-3000-ivr-inband-dtmf-detection-accurate-dual-tone-recognition-setup\">VOS3000 IVR Inband DTMF Detection: Accurate Dual-Tone Recognition Setup<\/a><ul><li><a href=\"#\ud83d\udcde-what-is-vos-3000-ivr-inband-dtmf-detection\">\ud83d\udcde What Is VOS3000 IVR Inband DTMF Detection?<\/a><ul><li><a href=\"#\ud83c\udfaf-why-vos-3000-ivr-inband-dtmf-detection-matters\">\ud83c\udfaf Why VOS3000 IVR Inband DTMF Detection Matters<\/a><\/li><\/ul><\/li><li><a href=\"#\u2699\ufe0f-inband-vs-out-of-band-dtmf-understanding-the-difference\">\u2699\ufe0f VOS3000 IVR Inband vs. Out-of-Band DTMF \u2014 Understanding the Difference<\/a><\/li><li><a href=\"#\ud83d\udccb-first-line-vs-second-line-inband-dtmf\">\ud83d\udccb First Line vs. Second Line Inband DTMF (VOS3000 IVR Inband)<\/a><\/li><li><a href=\"#\ud83d\udee1\ufe0f-common-inband-dtmf-problems-and-solutions\">\ud83d\udee1\ufe0f Common VOS3000 IVR Inband DTMF Problems and Solutions<\/a><ul><li><a href=\"#\u274c-problem-1-ivr-menu-does-not-respond-to-key-presses\">\u274c Problem 1: IVR Menu Does Not Respond to Key Presses<\/a><\/li><li><a href=\"#\u274c-problem-2-dtmf-detected-incorrectly-wrong-digits\">\u274c Problem 2: DTMF Detected Incorrectly \u2014 Wrong Digits<\/a><\/li><li><a href=\"#\u274c-problem-3-inband-dtmf-causes-false-detections\">\u274c Problem 3: Inband DTMF Causes False Detections<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udcca-vos-3000-ivr-inband-dtmf-configuration-checklist\">\ud83d\udcca VOS3000 IVR Inband DTMF Configuration Checklist<\/a><\/li><li><a href=\"#\u2753-frequently-asked-questions\">\u2753 Frequently Asked Questions<\/a><ul><li><a href=\"#\u2753-what-is-vos-3000-ivr-inband-dtmf-detection\">\u2753 What is VOS3000 IVR inband DTMF detection?<\/a><\/li><li><a href=\"#\u2753-should-i-enable-inband-dtmf-detection-by-default\">\u2753 Should I enable inband DTMF detection by default?<\/a><\/li><li><a href=\"#\u2753-why-are-there-separate-settings-for-first-and-second-line\">\u2753 Why are there separate settings for first and second line?<\/a><\/li><li><a href=\"#\u2753-does-codec-choice-affect-inband-dtmf-detection\">\u2753 Does codec choice affect inband DTMF detection?<\/a><\/li><li><a href=\"#\u2753-what-is-the-difference-between-inband-dtmf-and-rfc-2833\">\u2753 What is the difference between inband DTMF and RFC 2833?<\/a><\/li><li><a href=\"#\u2753-can-inband-dtmf-cause-false-detections\">\u2753 Can inband DTMF cause false detections?<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udcde-need-call-center-setup-support\">\ud83d\udcde Need Professional VOS3000 Setup Support?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcde-what-is-vos-3000-ivr-inband-dtmf-detection\">\ud83d\udcde What Is VOS3000 IVR Inband DTMF Detection?<\/h2>\n\n\n\n<p>\u23f1\ufe0f <strong>VOS3000 IVR inband DTMF detection<\/strong> is a feature that enables the IVR to recognize DTMF (Dual-Tone Multi-Frequency) tones embedded within the audio stream, rather than receiving them as out-of-band signaling via RFC 2833. In VoIP, DTMF can be transmitted in two ways: out-of-band (RFC 2833 or SIP INFO) where DTMF events are sent as separate signaling messages, and inband where DTMF tones are embedded within the audio stream itself and must be detected by analyzing the audio. \ud83d\udccb<\/p>\n\n\n\n<p>\ud83d\udccc According to the official VOS3000 V2.1.9.07 Manual, Section 4.3.5.3:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">Parameter<\/th><th class=\"has-text-align-left\" data-align=\"left\">Default<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><tr><td><strong>IVR_ENABLE_PARSE_INBAND<\/strong><\/td><td>Off<\/td><td>Inband DTMF Analysis<\/td><\/tr><tr><td><strong>IVR_ENABLE_PARSE_SECOND_INBAND<\/strong><\/td><td>Off<\/td><td>Second Line Inband DTMF Analysis<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\ud83d\udca1 <strong>Key insight:<\/strong> Both parameters default to Off, which means inband DTMF detection is disabled by default. This is appropriate for deployments where all endpoints support RFC 2833 out-of-band DTMF \u2014 which is the preferred method because it is more reliable and does not require audio analysis. Inband DTMF detection should only be enabled when you have endpoints that do NOT support RFC 2833 and instead send DTMF tones within the audio stream. The second parameter applies to the IVR&#8217;s second call leg (callback scenarios), which may have different DTMF characteristics. \ud83d\udd12<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83c\udfaf-why-vos-3000-ivr-inband-dtmf-detection-matters\">\ud83c\udfaf Why VOS3000 IVR Inband DTMF Detection Matters<\/h3>\n\n\n\n<p>\u26a0\ufe0f Without inband DTMF detection, IVR menus may not respond to key presses from certain endpoints:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udcde <strong>Legacy endpoints:<\/strong> Older SIP phones or analog telephone adapters (ATAs) may not support RFC 2833 and instead send DTMF tones inband within the audio stream<\/li>\n\n\n\n<li>\ud83d\udd04 <strong>PSTN gateway calls:<\/strong> Calls arriving from PSTN gateways may carry DTMF tones in the audio path rather than as separate signaling events<\/li>\n\n\n\n<li>\ud83d\udcca <strong>IVR menu failures:<\/strong> When inband DTMF is not detected, callers press keys but the IVR does not respond \u2014 they are stuck in the menu and cannot navigate<\/li>\n\n\n\n<li>\ud83d\udd11 <strong>PIN entry failure:<\/strong> Calling card and authentication systems that require PIN entry via DTMF will not work if the IVR cannot detect the inband tones<\/li>\n\n\n\n<li>\ud83d\udcde <strong>Callback scenarios:<\/strong> The second line of a callback call may use different DTMF signaling than the first line \u2014 separate configuration for the second line ensures both call legs can detect DTMF<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u2699\ufe0f-inband-vs-out-of-band-dtmf-understanding-the-difference\">\u2699\ufe0f VOS3000 IVR Inband vs. Out-of-Band DTMF \u2014 Understanding the Difference<\/h2>\n\n\n\n<p>\ud83d\udd04 Understanding the difference between inband and out-of-band DTMF is essential for proper <strong>VOS3000 IVR inband DTMF detection<\/strong> configuration. \ud83d\udce1<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">Aspect<\/th><th class=\"has-text-align-left\" data-align=\"left\">Out-of-Band (RFC 2833)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Inband DTMF<\/th><\/tr><tr><td>\ud83d\udce1 Transmission<\/td><td>Separate RTP payload type (typically 101)<\/td><td>DTMF tones embedded in audio stream<\/td><\/tr><tr><td>\ud83c\udfaf Reliability<\/td><td>\u2705 High \u2014 digital event packets, no audio analysis needed<\/td><td>\u26a0\ufe0f Moderate \u2014 can be affected by compression artifacts<\/td><\/tr><tr><td>\ud83c\udfa7 Codec impact<\/td><td>None \u2014 DTMF events are separate from audio encoding<\/td><td>Significant \u2014 compressed codecs (G.729) may distort tones<\/td><\/tr><tr><td>\ud83d\udccb Detection method<\/td><td>Standard \u2014 received as named telephony events<\/td><td>Audio analysis \u2014 DSP must detect dual-tone frequencies<\/td><\/tr><tr><td>\u2699\ufe0f VOS3000 setting<\/td><td>Enabled by default when endpoint negotiates RFC 2833<\/td><td>Must be explicitly enabled via IVR_ENABLE_PARSE_INBAND<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\ud83d\udca1 <strong>Recommendation:<\/strong> Always prefer RFC 2833 out-of-band DTMF when possible. Only enable inband DTMF detection for endpoints that cannot support RFC 2833. Inband detection adds processing overhead and is less reliable with compressed codecs like G.729. For help with DTMF configuration, reach us on WhatsApp at <strong>+8801911119966<\/strong>. \ud83d\udcf1<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udccb-first-line-vs-second-line-inband-dtmf\">\ud83d\udccb First Line vs. Second Line Inband DTMF (VOS3000 IVR Inband)<\/h2>\n\n\n\n<p>\ud83d\udd11 The <strong>VOS3000 IVR inband DTMF detection<\/strong> provides separate parameters for the first call leg and the second call leg. Understanding why there are two separate settings is important for callback scenarios: \ud83d\udee0\ufe0f<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">Parameter<\/th><th class=\"has-text-align-left\" data-align=\"left\">Call Leg<\/th><th class=\"has-text-align-left\" data-align=\"left\">When to Enable<\/th><\/tr><tr><td><strong>IVR_ENABLE_PARSE_INBAND<\/strong><\/td><td>First line (caller \u2192 IVR)<\/td><td>When the calling endpoint does not support RFC 2833 DTMF<\/td><\/tr><tr><td><strong>IVR_ENABLE_PARSE_SECOND_INBAND<\/strong><\/td><td>Second line (IVR \u2192 callback destination)<\/td><td>When the callback destination does not support RFC 2833 DTMF<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\ud83d\udccd <strong>Why separate settings?<\/strong> In a callback scenario, the IVR establishes two call legs: the first leg connects the IVR to the original caller, and the second leg connects the IVR to the callback destination. These two legs may traverse different networks, use different codecs, and involve endpoints with different DTMF capabilities. The first line may have RFC 2833 support while the second line may not \u2014 or vice versa. Providing separate inband detection settings for each leg ensures optimal DTMF handling regardless of the endpoint characteristics on each call leg. For more on callback scenarios, see our <a href=\"https:\/\/multahost.com\/blog\/vos3000-parameter-description\/\">IVR callback timing<\/a> guide. \ud83d\udcd6<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udee1\ufe0f-common-inband-dtmf-problems-and-solutions\">\ud83d\udee1\ufe0f Common VOS3000 IVR Inband DTMF Problems and Solutions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u274c-problem-1-ivr-menu-does-not-respond-to-key-presses\">\u274c Problem 1: IVR Menu Does Not Respond to Key Presses<\/h3>\n\n\n\n<p>\ud83d\udd0d <strong>Symptom:<\/strong> Callers press keys on their phone keypad while in the IVR menu, but the IVR does not detect the input and does not navigate to the selected option.<\/p>\n\n\n\n<p>\ud83d\udca1 <strong>Cause:<\/strong> The endpoint is sending DTMF inband (within the audio stream) but IVR_ENABLE_PARSE_INBAND is set to Off (default). The IVR is listening for RFC 2833 events but the endpoint is not sending them.<\/p>\n\n\n\n<p>\u2705 <strong>Solutions:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udccb Enable IVR_ENABLE_PARSE_INBAND by setting it to On in the Audio service parameters<\/li>\n\n\n\n<li>\ud83d\udd0d If this is a callback scenario, also check IVR_ENABLE_PARSE_SECOND_INBAND<\/li>\n\n\n\n<li>\ud83d\udcde Alternatively, configure the endpoint to use RFC 2833 DTMF (preferred method)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u274c-problem-2-dtmf-detected-incorrectly-wrong-digits\">\u274c Problem 2: DTMF Detected Incorrectly \u2014 Wrong Digits<\/h3>\n\n\n\n<p>\ud83d\udd0d <strong>Symptom:<\/strong> The IVR detects DTMF input but reports wrong digits \u2014 pressing &#8220;1&#8221; registers as &#8220;4&#8221; or pressing &#8220;5&#8221; is not detected at all.<\/p>\n\n\n\n<p>\ud83d\udca1 <strong>Cause:<\/strong> Inband DTMF detection is being affected by audio compression. When the call uses a compressed codec (G.729 or G.723), the DTMF tones may be distorted during encoding\/decoding, making it difficult for the DSP to accurately identify the dual-tone frequencies.<\/p>\n\n\n\n<p>\u2705 <strong>Solutions:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83c\udfa7 Use G.711 codec for calls that require inband DTMF \u2014 uncompressed audio preserves tone integrity<\/li>\n\n\n\n<li>\ud83d\udccb Adjust the <a href=\"https:\/\/multahost.com\/blog\/vos3000-dtmf-configuration\/\">IVR DTMF parse mode<\/a> setting to optimize detection sensitivity<\/li>\n\n\n\n<li>\ud83d\udcde Where possible, configure the endpoint to use RFC 2833 instead of inband DTMF<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u274c-problem-3-inband-dtmf-causes-false-detections\">\u274c Problem 3: Inband DTMF Causes False Detections<\/h3>\n\n\n\n<p>\ud83d\udd0d <strong>Symptom:<\/strong> The IVR detects DTMF digits that the caller did not press \u2014 voice audio is being misinterpreted as DTMF tones (false positive detection).<\/p>\n\n\n\n<p>\ud83d\udca1 <strong>Cause:<\/strong> Certain voice patterns or background noise can mimic DTMF frequency pairs, triggering false detections when inband analysis is enabled.<\/p>\n\n\n\n<p>\u2705 <strong>Solutions:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udccb Only enable IVR_ENABLE_PARSE_INBAND when actually needed \u2014 do not enable it globally for all endpoints<\/li>\n\n\n\n<li>\ud83d\udd0d Use RFC 2833 out-of-band DTMF for endpoints that support it to eliminate false detections<\/li>\n\n\n\n<li>\ud83d\udcde Adjust DTMF detection sensitivity if the VOS3000 configuration provides tuning parameters<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcca-vos-3000-ivr-inband-dtmf-configuration-checklist\">\ud83d\udcca VOS3000 IVR Inband DTMF Configuration Checklist<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">Check<\/th><th class=\"has-text-align-left\" data-align=\"left\">Action<\/th><th class=\"has-text-align-left\" data-align=\"left\">Status<\/th><\/tr><tr><td>\ud83d\udccc 1<\/td><td>Identify endpoints that do not support RFC 2833 DTMF<\/td><td>\u2610<\/td><\/tr><tr><td>\ud83d\udccc 2<\/td><td>Enable IVR_ENABLE_PARSE_INBAND to On for first-line inband DTMF detection<\/td><td>\u2610<\/td><\/tr><tr><td>\ud83d\udccc 3<\/td><td>Enable IVR_ENABLE_PARSE_SECOND_INBAND if callback destinations also need inband detection<\/td><td>\u2610<\/td><\/tr><tr><td>\ud83d\udccc 4<\/td><td>Test IVR menu navigation with the affected endpoints<\/td><td>\u2610<\/td><\/tr><tr><td>\ud83d\udccc 5<\/td><td>Monitor for false DTMF detections and adjust if needed<\/td><td>\u2610<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\ud83d\udcde For expert guidance on VOS3000 IVR DTMF configuration, reach us on WhatsApp at <strong>+8801911119966<\/strong>. \ud83d\udca1<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u2753-frequently-asked-questions\">\u2753 Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-what-is-vos-3000-ivr-inband-dtmf-detection\">\u2753 What is VOS3000 IVR inband DTMF detection?<\/h3>\n\n\n\n<p>\ud83d\udcde <strong>VOS3000 IVR inband DTMF detection<\/strong> is a feature that enables the IVR to recognize DTMF (Dual-Tone Multi-Frequency) key presses embedded within the audio stream, rather than receiving them as out-of-band RFC 2833 events. According to the VOS3000 V2.1.9.07 Manual (Section 4.3.5.3), two parameters control this: IVR_ENABLE_PARSE_INBAND (default: Off) \u2014 &#8220;Inband DTMF Analysis&#8221; for the first call leg, and IVR_ENABLE_PARSE_SECOND_INBAND (default: Off) \u2014 &#8220;Second Line Inband DTMF Analysis&#8221; for the callback second line. Both default to Off because RFC 2833 is the preferred DTMF method. \ud83d\udccb<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-should-i-enable-inband-dtmf-detection-by-default\">\u2753 Should I enable inband DTMF detection by default?<\/h3>\n\n\n\n<p>\ud83d\udccb No. The VOS3000 manual sets both IVR_ENABLE_PARSE_INBAND and IVR_ENABLE_PARSE_SECOND_INBAND to Off by default for good reason. RFC 2833 out-of-band DTMF is more reliable, does not require audio analysis, and is not affected by codec compression. Inband detection should only be enabled when you have specific endpoints that do NOT support RFC 2833 and instead send DTMF tones within the audio stream. Enabling inband detection unnecessarily adds processing overhead and increases the risk of false DTMF detections from voice audio. \ud83d\udd27<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-why-are-there-separate-settings-for-first-and-second-line\">\u2753 Why are there separate settings for first and second line?<\/h3>\n\n\n\n<p>\ud83d\udd04 In a callback scenario, the IVR establishes two separate call legs. The first line connects the IVR to the original caller, and the second line connects the IVR to the callback destination. These two legs may involve endpoints with different DTMF capabilities \u2014 the first line endpoint may support RFC 2833 while the second line may not. By providing IVR_ENABLE_PARSE_INBAND (first line) and IVR_ENABLE_PARSE_SECOND_INBAND (second line) as separate parameters, VOS3000 allows you to enable inband detection independently for each call leg based on the specific endpoint requirements. \ud83d\udca1<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-does-codec-choice-affect-inband-dtmf-detection\">\u2753 Does codec choice affect inband DTMF detection?<\/h3>\n\n\n\n<p>\ud83c\udfa7 Yes, significantly. Inband DTMF detection relies on analyzing the audio stream to identify dual-tone frequency pairs. When a compressed codec like G.729 or G.723 is used, the DTMF tones may be distorted during encoding and decoding, making them harder to detect accurately. G.711 (uncompressed) preserves the original DTMF frequencies and provides the best environment for inband detection. If you must use inband DTMF, consider using G.711 for the call leg that requires it, or configure the <a href=\"https:\/\/multahost.com\/blog\/vos3000-parameter-description\/\">IVR codec priority<\/a> to prefer G.711 for those calls. \ud83d\udcd6<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-what-is-the-difference-between-inband-dtmf-and-rfc-2833\">\u2753 What is the difference between inband DTMF and RFC 2833?<\/h3>\n\n\n\n<p>\ud83d\udce1 Inband DTMF sends the dual-tone signals within the audio stream itself \u2014 the same RTP packets that carry voice also carry the DTMF tones, and the receiver must analyze the audio to detect them. RFC 2833 (named telephony events) sends DTMF as separate RTP payload types alongside the audio stream \u2014 the receiver gets explicit digital events indicating which key was pressed, when it was pressed, and for how long. RFC 2833 is more reliable, works with any codec, and is not affected by compression. Inband is needed only for endpoints that cannot support RFC 2833. \ud83d\udccb<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2753-can-inband-dtmf-cause-false-detections\">\u2753 Can inband DTMF cause false detections?<\/h3>\n\n\n\n<p>\u26a0\ufe0f Yes. When inband DTMF detection is enabled, the DSP continuously analyzes the audio stream for dual-tone frequency pairs. Certain voice patterns, background noise, or music on hold can occasionally mimic DTMF frequencies, triggering false key detections. This is a known limitation of inband detection and is another reason why RFC 2833 is preferred. To minimize false detections, only enable inband detection for endpoints that truly need it, and use G.711 codec for those calls to improve detection accuracy. \ud83d\udee1\ufe0f<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcde-need-call-center-setup-support\">\ud83d\udcde Need Professional VOS3000 Setup Support?<\/h2>\n\n\n\n<p>For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:<\/p>\n\n\n\n<p>\ud83d\udcf1 <strong>WhatsApp:<\/strong> <a href=\"https:\/\/wa.me\/8801911119966\" target=\"_blank\" rel=\"noopener\">+8801911119966<\/a><br>\ud83c\udf10 <strong>Website:<\/strong> <a href=\"https:\/\/www.vos3000.com\" target=\"_blank\" rel=\"noopener\">www.vos3000.com<\/a><br>\ud83c\udf10 <strong>Blog:<\/strong> <a href=\"https:\/\/multahost.com\/blog\">multahost.com\/blog<\/a><br>\ud83d\udce5 <strong>Downloads:<\/strong> <a href=\"https:\/\/www.vos3000.com\/downloads.php\" target=\"_blank\" rel=\"noopener\">VOS3000 Downloads<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 Authorization Type Hierarchy, VOS3000 Reverse Charging, VOS3000 DID DDI Numbers, VOS3000 Call Forwarding Types, VOS3000 Do Not Disturb Mode, VOS3000 Display Caller ID Forwarding, VOS3000 Monthly Consumption Limits, VOS3000 IVR Callback Timing, VOS3000 IVR Call State UDP Reporting, VOS3000 IVR Codec Priority, VOS3000 IVR Voicemail Navigation, VOS3000 IVR Custom Ringback Tone, VOS3000 IVR DTMF Parse Mode, VOS3000 IVR Voicemail System, VOS3000 authorization type hierarchy, VOS3000 reverse charging configuration, VOS3000 DID DDI numbers, VOS3000 call forwarding types, VOS3000 do not disturb mode, VOS3000 display caller ID forwarding, VOS3000 monthly consumption limits, VOS3000 IVR callback timing, VOS3000 IVR call state UDP, VOS3000 IVR codec priority, VOS3000 IVR inband DTMF detection, VOS3000 IVR DTMF parse mode, VOS3000 IVR voicemail system, VOS3000 IVR voice alarm configuration, VOS3000 IVR custom ringback tone, VOS3000 IVR voicemail navigation\" title=\"\" class=\"lazyload\" data-src=\"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Do-Not-Disturb-Mode-VOS3000-Display-Caller-ID-Forwarding-VOS3000-Monthly-Consumption-Limits-VOS3000-IVR-Callback-Timing-2.png?resize=809%2C540\"><\/td><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 Authorization Type Hierarchy, VOS3000 Reverse Charging, VOS3000 DID DDI Numbers, VOS3000 Call Forwarding Types, VOS3000 Do Not Disturb Mode, VOS3000 Display Caller ID Forwarding, VOS3000 Monthly Consumption Limits, VOS3000 IVR Callback Timing, VOS3000 IVR Call State UDP Reporting, VOS3000 IVR Codec Priority, VOS3000 IVR Voicemail Navigation, VOS3000 IVR Custom Ringback Tone, VOS3000 IVR DTMF Parse Mode, VOS3000 IVR Voicemail System, VOS3000 authorization type hierarchy, VOS3000 reverse charging configuration, VOS3000 DID DDI numbers, VOS3000 call forwarding types, VOS3000 do not disturb mode, VOS3000 display caller ID forwarding, VOS3000 monthly consumption limits, VOS3000 IVR callback timing, VOS3000 IVR call state UDP, VOS3000 IVR codec priority, VOS3000 IVR inband DTMF detection, VOS3000 IVR DTMF parse mode, VOS3000 IVR voicemail system, VOS3000 IVR voice alarm configuration, VOS3000 IVR custom ringback tone, VOS3000 IVR voicemail navigation\" title=\"\" class=\"lazyload\" data-src=\"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Do-Not-Disturb-Mode-VOS3000-Display-Caller-ID-Forwarding-VOS3000-Monthly-Consumption-Limits-VOS3000-IVR-Callback-Timing-2.png?resize=809%2C540\"><\/td><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 Authorization Type Hierarchy, VOS3000 Reverse Charging, VOS3000 DID DDI Numbers, VOS3000 Call Forwarding Types, VOS3000 Do Not Disturb Mode, VOS3000 Display Caller ID Forwarding, VOS3000 Monthly Consumption Limits, VOS3000 IVR Callback Timing, VOS3000 IVR Call State UDP Reporting, VOS3000 IVR Codec Priority, VOS3000 IVR Voicemail Navigation, VOS3000 IVR Custom Ringback Tone, VOS3000 IVR DTMF Parse Mode, VOS3000 IVR Voicemail System, VOS3000 authorization type hierarchy, VOS3000 reverse charging configuration, VOS3000 DID DDI numbers, VOS3000 call forwarding types, VOS3000 do not disturb mode, VOS3000 display caller ID forwarding, VOS3000 monthly consumption limits, VOS3000 IVR callback timing, VOS3000 IVR call state UDP, VOS3000 IVR codec priority, VOS3000 IVR inband DTMF detection, VOS3000 IVR DTMF parse mode, VOS3000 IVR voicemail system, VOS3000 IVR voice alarm configuration, VOS3000 IVR custom ringback tone, VOS3000 IVR voicemail navigation\" title=\"\" class=\"lazyload\" data-src=\"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Do-Not-Disturb-Mode-VOS3000-Display-Caller-ID-Forwarding-VOS3000-Monthly-Consumption-Limits-VOS3000-IVR-Callback-Timing-2.png?resize=809%2C540\"><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Master VOS3000 IVR inband DTMF detection with IVR_ENABLE_PARSE_INBAND and IVR_ENABLE_PARSE_SECOND_INBAND. Configure dual-tone recognition for IVR menus when RFC2833 is not negotiated.<\/p>\n","protected":false},"author":1,"featured_media":3460,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2,645,646,647],"tags":[11670,11924,11919,11935,11747,11748,11925,11927,11941,11938,11948,11939,11929,11944,11920,11946,11928,11949,11918,11932,11945,11922,11937,11915,11936,11921,11930,11931,11940,11947,11943,11926,11942,11923,11621,11934,11933,11916,11917],"class_list":["post-3493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vos3000","category-vos3000-ivr-change","category-vos3000-ivr-management","category-vos3000-ivr-settings","tag-vos3000-ivr-audio-service-parameter","tag-vos3000-ivr-dtmf-audio-stream","tag-vos3000-ivr-dtmf-detection-configuration","tag-vos3000-ivr-dtmf-detection-on-off","tag-vos3000-ivr-dtmf-endpoint","tag-vos3000-ivr-dtmf-keypad","tag-vos3000-ivr-dtmf-menu-navigation","tag-vos3000-ivr-dtmf-not-negotiated","tag-vos3000-ivr-dtmf-parse","tag-vos3000-ivr-dtmf-recognition","tag-vos3000-ivr-dtmf-signaling","tag-vos3000-ivr-dtmf-tones-audio","tag-vos3000-ivr-dtmf-v2-1-9-07","tag-vos3000-ivr-dtmf-without-rfc2833","tag-vos3000-ivr-dual-tone-recognition","tag-vos3000-ivr-inband-detection-enable","tag-vos3000-ivr-inband-detection-manual","tag-vos3000-ivr-inband-detection-parameters","tag-vos3000-ivr-inband-dtmf-analysis","tag-vos3000-ivr-inband-dtmf-best-practices","tag-vos3000-ivr-inband-dtmf-configuration","tag-vos3000-ivr-inband-dtmf-default-off","tag-vos3000-ivr-inband-dtmf-deployment","tag-vos3000-ivr-inband-dtmf-detection","tag-vos3000-ivr-inband-dtmf-faq","tag-vos3000-ivr-inband-dtmf-on-off","tag-vos3000-ivr-inband-dtmf-setup","tag-vos3000-ivr-inband-dtmf-troubleshooting","tag-vos3000-ivr-inband-rfc2833","tag-vos3000-ivr-inband-vs-out-of-band","tag-vos3000-ivr-menu-key-detection","tag-vos3000-ivr-rfc2833-fallback","tag-vos3000-ivr-second-line-dtmf","tag-vos3000-ivr-second-line-inband","tag-vos3000-ivr-section-4-3-5-3","tag-vos3000-ivr-softswitch-dtmf","tag-vos3000-ivr-voip-dtmf","tag-vos3000-ivr_enable_parse_inband","tag-vos3000-ivr_enable_parse_second_inband"],"acf":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-IVR-Callback-Timing-VOS3000-IVR-Call-State-UDP-Reporting-VOS3000-IVR-Codec-Priority-VOS3000-IVR-Voicemail-Navigation-2.png?fit=1691%2C930&ssl=1?v=1777503151","jetpack-related-posts":[{"id":1809,"url":"https:\/\/multahost.com\/blog\/vos3000-vicidial-auto-dialer\/","url_meta":{"origin":3493,"position":0},"title":"VOS3000 VICIdial Auto Dialer Solution \u2013 Call Center Important Setup Guide","author":"king","date":"March 13, 2026","format":false,"excerpt":"Complete guide to VOS3000 VICIdial auto dialer solution for call centers. Learn how VICIdial connects with VOS3000 for routing and telecom carrier management.","rel":"","context":"In &quot;VOS3000&quot;","block_context":{"text":"VOS3000","link":"https:\/\/multahost.com\/blog\/category\/vos3000\/"},"img":{"alt_text":"best voip softswitch, vos3000 routing, vos3000 vicidial auto dialer, vos3000 sip trunk configuration","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/best-voip-softswitch.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/best-voip-softswitch.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/best-voip-softswitch.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/best-voip-softswitch.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/best-voip-softswitch.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":3404,"url":"https:\/\/multahost.com\/blog\/vos3000-no-answer-auto-blacklist\/","url_meta":{"origin":3493,"position":1},"title":"VOS3000 No-Answer Auto-Blacklist: Proven SS_BLACK_LIST_NO_ANSWER Configuration","author":"king","date":"April 28, 2026","format":false,"excerpt":"Configure VOS3000 no-answer auto-blacklist with SS_BLACK_LIST_NO_ANSWER. Block dead-end numbers, prevent wasted port capacity, and optimize routing.","rel":"","context":"In &quot;VOS3000&quot;","block_context":{"text":"VOS3000","link":"https:\/\/multahost.com\/blog\/category\/vos3000\/"},"img":{"alt_text":"VOS3000 Malicious Caller Blacklist, VOS3000 No-Answer Auto-Blacklist, VOS3000 Concurrent Call Abuse Blacklist, VOS3000 Login Brute-Force Lockout, VOS3000 Password Policy Configuration, VOS3000 Unauthorized SIP Response, VOS3000 TCP Close Reset, VOS3000 Registration Replace Kick, VOS3000 Lightweight Registration Interval, VOS3000 Authentication Retry Limits, VOS3000 Call Authentication Mode","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Registration-Replace-Kick-VOS3000-Lightweight-Registration-Interval-VOS3000-Authentication-Retry-Limits-VOS3000-Call-Authentication-Mode-1.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Registration-Replace-Kick-VOS3000-Lightweight-Registration-Interval-VOS3000-Authentication-Retry-Limits-VOS3000-Call-Authentication-Mode-1.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Registration-Replace-Kick-VOS3000-Lightweight-Registration-Interval-VOS3000-Authentication-Retry-Limits-VOS3000-Call-Authentication-Mode-1.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Registration-Replace-Kick-VOS3000-Lightweight-Registration-Interval-VOS3000-Authentication-Retry-Limits-VOS3000-Call-Authentication-Mode-1.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-Registration-Replace-Kick-VOS3000-Lightweight-Registration-Interval-VOS3000-Authentication-Retry-Limits-VOS3000-Call-Authentication-Mode-1.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1631,"url":"https:\/\/multahost.com\/blog\/vos3000-data-maintenance\/","url_meta":{"origin":3493,"position":2},"title":"VOS3000 Data Maintenance &amp; Auto\u2011Cleanup: Important Database Management Guide","author":"king","date":"March 8, 2026","format":false,"excerpt":"VOS3000 data maintenance guide: learn how to manage CDR tables, enable auto\u2011cleanup, optimize database performance, and prevent disk space issues with scheduled purging.","rel":"","context":"In &quot;VOS3000&quot;","block_context":{"text":"VOS3000","link":"https:\/\/multahost.com\/blog\/category\/vos3000\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-banners-post.png?fit=1200%2C402&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-banners-post.png?fit=1200%2C402&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-banners-post.png?fit=1200%2C402&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-banners-post.png?fit=1200%2C402&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-banners-post.png?fit=1200%2C402&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":710,"url":"https:\/\/multahost.com\/blog\/why-vos3000-server-getting-restarted-daily-auto\/","url_meta":{"origin":3493,"position":3},"title":"Why VOS3000 Server getting restarted daily auto, Know easy Solution","author":"king","date":"September 29, 2025","format":false,"excerpt":"Why VOS3000 Server getting restarted daily auto? VOS3000 2.1.8.0 or 2.1.8.05 sometime VOS3000 server went down\/restart\/reboot auto daily in a fixed time and VOS3000 server starts but vos3000 softswitch shows offline or softswitch stays offline or red on softswich","rel":"","context":"In &quot;VOS3000&quot;","block_context":{"text":"VOS3000","link":"https:\/\/multahost.com\/blog\/category\/vos3000\/"},"img":{"alt_text":"VOS3000 Server down","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2025\/09\/1759078473-e1759086323296.png?fit=928%2C480&ssl=1%3Fv%3D1768597291&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2025\/09\/1759078473-e1759086323296.png?fit=928%2C480&ssl=1%3Fv%3D1768597291&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2025\/09\/1759078473-e1759086323296.png?fit=928%2C480&ssl=1%3Fv%3D1768597291&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2025\/09\/1759078473-e1759086323296.png?fit=928%2C480&ssl=1%3Fv%3D1768597291&resize=700%2C400 2x"},"classes":[]},{"id":3017,"url":"https:\/\/multahost.com\/blog\/vos3000-g729-negotiation-mode-fix\/","url_meta":{"origin":3493,"position":4},"title":"VOS3000 G729 Negotiation Mode: Reliable Fix for Codec Mismatch","author":"king","date":"April 18, 2026","format":false,"excerpt":"VOS3000 G729 negotiation mode fixes codec mismatch between G729 and G729a. Configure Auto\/G729\/G729a\/G729&G729a modes in routing gateway additional settings.","rel":"","context":"In &quot;VOS3000&quot;","block_context":{"text":"VOS3000","link":"https:\/\/multahost.com\/blog\/category\/vos3000\/"},"img":{"alt_text":"VOS3000 SIP Authentication, VOS3000 Domain Management, VOS3000 Call Failed Announcement, VOS3000 G729 Negotiation Mode, VOS3000 RTP Encryption","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Authentication-VOS3000-Domain-Management-VOS3000-Call-Failed-Announcement-VOS3000-G729-Negotiation-Mode-VOS3000-RTP-Encryption-4.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Authentication-VOS3000-Domain-Management-VOS3000-Call-Failed-Announcement-VOS3000-G729-Negotiation-Mode-VOS3000-RTP-Encryption-4.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Authentication-VOS3000-Domain-Management-VOS3000-Call-Failed-Announcement-VOS3000-G729-Negotiation-Mode-VOS3000-RTP-Encryption-4.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Authentication-VOS3000-Domain-Management-VOS3000-Call-Failed-Announcement-VOS3000-G729-Negotiation-Mode-VOS3000-RTP-Encryption-4.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Authentication-VOS3000-Domain-Management-VOS3000-Call-Failed-Announcement-VOS3000-G729-Negotiation-Mode-VOS3000-RTP-Encryption-4.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":3152,"url":"https:\/\/multahost.com\/blog\/vos3000-sip-outbound-registration-parameters\/","url_meta":{"origin":3493,"position":5},"title":"VOS3000 SIP Outbound Registration Parameters: Expiry and Retry Delay Easy Guide","author":"king","date":"April 21, 2026","format":false,"excerpt":"Master VOS3000 SIP outbound registration parameters: SS_SIP_USER_AGENT_EXPIRE (Auto Negotiation, 20-7200s) and SS_SIP_USER_AGENT_RETRY_DELAY (30-600s). Configure registration expiry, retry delay, and failover for stable SIP trunking.","rel":"","context":"In &quot;VOS3000 SIP&quot;","block_context":{"text":"VOS3000 SIP","link":"https:\/\/multahost.com\/blog\/category\/vos3000-sip\/"},"img":{"alt_text":"VOS3000 SIP Authentication Retry, VOS3000 SIP Early Hangup, VOS3000 SIP Session Timer Refresh, VOS3000 Non-Timer Endpoint Safety, VOS3000 SIP NAT Keepalive, VOS3000 SIP Resend Interval, VOS3000 SIP INVITE Timeout, VOS3000 SIP Call Progress Timeout, VOS3000 SIP Outbound Registration Parameters, VOS3000 SIP Privacy Header, VOS3000 SIP Routing Gateway Contact, VOS3000 SIP Publish Expire, VOS3000 SIP Display From, VOS3000 SIP Send Unregister","src":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Routing-Gateway-Contact-VOS3000-SIP-Publish-Expire-VOS3000-SIP-Display-From-VOS3000-SIP-Send-Unregister.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Routing-Gateway-Contact-VOS3000-SIP-Publish-Expire-VOS3000-SIP-Display-From-VOS3000-SIP-Send-Unregister.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Routing-Gateway-Contact-VOS3000-SIP-Publish-Expire-VOS3000-SIP-Display-From-VOS3000-SIP-Send-Unregister.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Routing-Gateway-Contact-VOS3000-SIP-Publish-Expire-VOS3000-SIP-Display-From-VOS3000-SIP-Send-Unregister.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/04\/VOS3000-SIP-Routing-Gateway-Contact-VOS3000-SIP-Publish-Expire-VOS3000-SIP-Display-From-VOS3000-SIP-Send-Unregister.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/posts\/3493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/comments?post=3493"}],"version-history":[{"count":1,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/posts\/3493\/revisions"}],"predecessor-version":[{"id":3520,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/posts\/3493\/revisions\/3520"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/media\/3460"}],"wp:attachment":[{"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/media?parent=3493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/categories?post=3493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/multahost.com\/blog\/wp-json\/wp\/v2\/tags?post=3493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}