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SIP-T21P - No audio if SRTP used, also, and no spanish web UI
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jcvh Offline
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Post: #3
RE: SIP-T21P - No audio if SRTP used, also, and no spanish web UI
Thank you James for your quick response, my comments:

(09-24-2014 09:54 AM)Yealink_James Wrote:  Hi JuanV,

What's the firmware of your T21?
Please upgrade to latest and chcek again.


Sorry, i should have said this:
The first thing i did, even before loading any configuration, was upgrade the firmware to the latest version available in de yealink web page, being the exact same you say, .-

(09-24-2014 09:54 AM)Yealink_James Wrote:  1.The firmware should contain Spanish.

I can confirm that the telephone user interface has spanish, this is, the telephone's screen display and menus, but the Web User Interface does not.

(09-24-2014 09:54 AM)Yealink_James Wrote:  2.If the SRTP no voice problem still occurs in this firmware, please get a pcap trace/ level 6 syslog/ config.bin file.


I'll provide those as soon as posible.

(09-24-2014 09:54 AM)Yealink_James Wrote:  3.In last firmware the Router mode has been removed in all Yealink model because almost no users will use this mode. The default port mode is Bridge.

In this document:
Item 3.1 (line 35. first item under "Bug Fixes") reads: "1. Modified the PC Port Configuration of T20/T22/T26/T28 to Router mode by default."

By the way, i need to make you notice that, while using SRTP, once a call is sent to the phone, it looses ALL AUDIO CAPABILITIES, it does "ring": the line button blink, and the incomming call info shows in the screen, that is, but it does not make any noise.

Besides, i noticed that my hardware version is "", thas doesn't fit in the usual nomenclature, is this normal?

Thanks again!


(This post was last modified: 09-25-2014 05:10 AM by jcvh.)
09-25-2014 04:07 AM
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RE: SIP-T21P - No audio if SRTP used, also, and no spanish web UI - jcvh - 09-25-2014 04:07 AM

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