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No Sound for a few seconds

tkauer2591
Level 1
Level 1

Hi Gents,

I have a Problem with 7921 phones on CUCM 8.0. When the phone rings, i answer the call but i don't hear nothing for 10-15 seconds. After this time i can talk normally with the caller. Outgoing calls are no problem just incoming call have this issue.

I Hope you have some ideas

Thank you

Sent from Cisco Technical Support iPhone App

6 Replies 6

paolo bevilacqua
Hall of Fame
Hall of Fame

Update phone firmware.

tkauer2591
Level 1
Level 1

I've tried three different kinds of firmware

That is exactly ?

Hi,

We had bother with 7921s a while back

Look at this link you may find some answes here

http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7921g/5_0_1/english/administration/guide/7921trb.html#wp1106690

Regards,
Alex.
Please rate useful posts.

Regards, Alex. Please rate useful posts.

nikshah
Cisco Employee
Cisco Employee

Thomas

Can you kindly let us know the three variants of firmwares that you are currently running.

Regards

Niket

Kindly rate all useful posts!!!

I recently have a similiar problem, look like you are having a delay with your call incoming call signaling.

Could you please describe your topology?

First of all, try to check if you have packet loss in: Phone port and CUCM Server port, this can be causing this issue.

Regards

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