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T21P E2 Audio Issues
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complex1 Offline
3CX Adv. Cert. Engineer
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Posts: 1,258
Joined: Jan 2014
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Post: #2
RE: T21P E2 Audio Issues
wilcochris Wrote:When a caller rings, I cannot hear them speak but they can hear me.

One way audio is usually caused by the router.
Please make sure SIP ALG function of the router is disabled and the right RTP ports are forwarded/opened to the IP phone.

Hope this helps.

Kind regards,
Frank.

I am not an employee of Yealink.
Dutch is my native language, not English. Apologies for my imperfect grammar.
Please do not send unsolicited PM messages. I will not answer them.
06-05-2017 07:51 PM
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Messages In This Thread
T21P E2 Audio Issues - wilcochris - 06-05-2017, 03:46 PM
RE: T21P E2 Audio Issues - complex1 - 06-05-2017 07:51 PM
RE: T21P E2 Audio Issues - wilcochris - 06-06-2017, 12:36 PM
RE: T21P E2 Audio Issues - complex1 - 06-06-2017, 01:12 PM

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