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T22 - One way audio for internal call to SCCP phone
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jst68 Offline
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Post: #1
Question T22 - One way audio for internal call to SCCP phone
I am using FreePBX to operate my phones. Everything is working fine with receiving and making outside calls. Furthermore, all internal calls, with the exception of one scenario, are working fine as well.

The only scenario that isn't working is a call from T22 phone (SIP) to a Cisco phone (SCCP). It only has one way audio (no audio from the Cisco phone) when the T22 calls the Cisco phone.

Should I assume that it is a Yealink issue since it is working with the Siemens Gigaset? Calls between the Yealink and Gigset phone work fine though...

Oddly, enough everything also works fine when the Cisco phone calls the T22.

I have been playing around with a lot of settings, but I cannot figure out what the issue.

Is somebody here successfully using the same scenario? Any tips?

Thank you!
(This post was last modified: 01-08-2016 01:34 AM by jst68.)
01-08-2016 01:24 AM
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Karl_Yealink Offline
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Post: #2
RE: T22 - One way audio for internal call to SCCP phone
T22 calls to Cisco phone, you can't hear anything in the Cisco phone? Or you can't hear anything in T22?

Please help us to get a pcap trace/ level 6 syslog/ config.bin file. We can check something from them.
You can get more info from:
http://forum.yealink.com/forum/showthread.php?tid=1319 
01-08-2016 05:54 AM
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gmalsack Offline
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Post: #3
RE: T22 - One way audio for internal call to SCCP phone
I'm experiencing the exact same problem.... Was a solution to this issue discovered? I also have a digium d40. that phone can call the cisco sccp phone just fine, but the t42g can't..... :-(
02-20-2016 04:59 AM
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