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one way audio on ISDN pri - Cisco Community
https://community.cisco.com/t5/ip-telephony-and-phones/one-way-audio-on-isdn-pri/td-p/2836634
one way audio on ISDN pri To overcome toll fraud vulnerability on a 3925 VG with IOS ( c3900-universalk9-mz.SPA.150-1.M4.bin) was upgraded to (c3900-universalk9-mz.SPA.154-3.M3.bin). After upgrade intermittent one way audio issue started coming.
MGCP GW "PRI Calls only" - One-Way Audio...along with MPLS ...
https://learningnetwork.cisco.com/s/question/0D53i00000Ksqoh/mgcp-gw-pri-calls-only-oneway-audioalong-with-mpls-link-upgrade
NOTE - ONE-WAY AUDIO ISSUE only with PRI CALLS.....ON-NET Calls always work properly over both MPLS links for inter-region and intra-region calls... Also to clarify, same MGCP Gateway (3925) registered with CUCM 9.1.2 over a MPLS Link of 10MBPS along with a local / native PRI does work perfectly fine..means both way audio, without any fail.
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 ISR4331 one-way audio - Cisco Community
https://community.cisco.com/t5/ip-telephony-and-phones/cisco-isr4331-one-way-audio/td-p/3004940
I am experiencing the same problem after replacing my old Cisco 2901 with a new Cisco 4351. I am experiencing one-way audio on PSTN calls where the called party can here me but I can't hear the called party on my Cisco IP phone. The issue happens on both incoming and outgoing PSTN calls. Internal IP to IP calls are working fine.
Troubleshoot One Way Audio Issue Using CLI Debug ... - Cisco
https://www.cisco.com/c/en/us/support/docs/collaboration-endpoints/ip-phone-7800-series/200903-Troubleshoot-One-Way-Audio-Issue-Using-C.html
In this article, an alternative method is used. It can be very useful especially when dealing with sporadic one-way audio issues. Capturing the Logs. Step 1. Enable SSH on the IP phone. Step 2. Optional step. Configure dumping the phone logs to Syslog server. As mentioned already, a one-way audio problem is usually intermittent.
NEC SV9100 Intermittent one way audio on ISDN-PRI - NEC ...
https://www.tek-tips.com/viewthread.cfm?qid=1796254
RE: NEC SV9100 Intermittent one way audio on ISDN-PRI AKgreatland (Vendor) 7 Aug 19 21:55 PFD45 curious what you did to fix your issue.I dont have an issue at this time just wanted to make notes as we have had similar issues in the past.
Cisco One Way Audio - Cisco: Call Manager - Tek-Tips
https://www.tek-tips.com/viewthread.cfm?qid=1490860
One way audio is usually always a routing issue - i.e. the path from endpoint 'A' to to the endpoint 'B' is correct, however the path from endpoint 'B' to to the endpoint 'A' isn't. I have also seen duplicate IP addresses cause the same issue - i.e. someone spoofs the routers IP address so traffic is sent to the spoofer instead of the router.
Cisco Bug: CSCuy85653 - One way audio via ISR 4K after ...
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuy85653
Symptom: PSTN -- PRI -- 4431 gateway -- SIP -- CUCM-- IP phone One way audios in specific SNR callflow. Call is made from PSTN to IP phone. IP phone rings but does not pick up so call is sent to the Remote Destination using same gateway. Two way audio establishes. When remote destination hangs up , call is resumed on IP phone and there is one way audio.
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