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No sound calling from FXS to IP ext. - Cisco Community
https://community.cisco.com/t5/voice-systems/no-sound-calling-from-fxs-to-ip-ext/td-p/3281913
FXS 3 and 4 to IP extentions = no sount or DTMF tones. IP extensions to FXS 3 and 4 = normal sound. FXS 3 and 4 to/from any other FXS (SPA8800 and UC320W) = normal sound. FXS 3 and 4 to/from FXO lines = normal sound. The tests included the use of different phones and even different wiring, results were consistent and specific to FXS 3 and 4 initiating a call to any …
Cisco Bug: CSCea32191 - no audio path confirmation for FXS ...
https://quickview.cloudapps.cisco.com/quickview/bug/CSCea32191
Symptoms: ===== In the 12.2T releases of IOS software, an FXS-to-FXS "connection trunk" (with no signaling) will generally have no end-to-end audio path whatsoever.
How to troubleshoot one-way / no audio issues - Cisco ...
https://community.cisco.com/t5/collaboration-voice-and-video/how-to-troubleshoot-one-way-no-audio-issues/ta-p/3164442
How to check really quick if the phones are sending / receiving RTP (audio). * Open the web page for 2 test phones, then click the 'stream 1' link located at the left handed side of the page, and check if the IP address and port match the information on both sides, keep pressing the 'stream 1' link and you will notice that the Tx and Rx stats ...
Cisco Bug: CSCdy23782 - voice calls fail, no audio, when ...
https://quickview.cloudapps.cisco.com/quickview/bug/CSCdy23782
Cisco Bug: CSCdy23782 - voice calls fail, no audio, when switching between FXS and FXO ports. Last Modified . Jan 14, 2019. Products (1) Cisco 3600 Series Multiservice Platforms ... and Foreign Exchange Office (FXO) ports. Conditions: This symptom is observed when switching is performed between FXS and FXO ports on a Cisco router. View Bug ...
Understanding Foreign Exchange Station (FXS) Voice ... - …
https://www.cisco.com/c/en/us/support/docs/voice/analog-signaling-e-m-did-fxs-fxo/7938-2fxs-vic.html
3 Voice is not supported on Cisco 3631 series router. 4 The VIC-2DID card can operate in both DID (default setting) and FXS modes on the Cisco 1751 and 1760, and when installed in the NM-1V and NM-2V on other voice platforms. When installed in a NM-HD-1V, NM-HD-2V, NM-HD-2VE, and NM-HDV2, the VIC-2DID card only operates in DID mode until the IOS …
r/Cisco - Making sense of FXS ports, VG310s, and their ...
https://www.reddit.com/r/Cisco/comments/oq5tn4/making_sense_of_fxs_ports_vg310s_and_their/
One way/no way audio affecting all FXS ports on those devices is a routing/firewall issue. Make sure traffic between the VG and the other device is allowed in both directions. Typically only signaling goes thru the CUCM server. Media goes point to point (with some exceptions).
Analog FXS Port SIP Registration with CUCM - Cisco
https://www.cisco.com/c/dam/en/us/support/docs/unified-communications/vg-series-gateways/analog-fxs-port-sip-registration-with-cucmv2.pdf
Cisco recommends to have knowledge of these subjects SIP protocol Foreign Exchange Station (FXS) ports Cisco Unified Communications Manager (CUCM) Cisco Analog Voice Gateway (VG Series) Requirements: The FXS Ports for Supplementary Services feature is supported on Cisco VG450 Voice Gateway and Cisco 4461 ISR.
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