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New Member

Asterisk + cisco 3905 problem! Sometimes callers can not hear each other

Asterisk + cisco 3905 problem! Sometimes  callers can not hear each other. Who knows how to solve this problem? What configurations need to provide?

2 REPLIES

Generally this occurs due to

Generally this occurs due to routing issue.

What you need to do is enable packet capture on switch port where 3905 is connected , compare SIP messages of both working and non working condition and see the SDP media ip and port in OK/ACK message of SIP.

Then look at network configuration , do you see any config which blocks that RTP port or Media IP ?  and do some extended ping from SIP phone IP to remote media IP.

 

Thanks

Manish

New Member

The problem comes when you

The problem comes when you call on speakerphone. Callers can not hear each other. Pressing the button twice handsfree audibility is restored.

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