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No voice or SIP extension will not ring

Solution

Some of the extensions will not ring or no voice after answer.


1: SIP registration fails from time to time, or show UNREACHABLE status even registered.
2: SIP extension rings but no voice after answered. CLI shows
[Jan 23 03:53:29] WARNING[2551]: chan_sip.c:4024 retrans_pkt: Retransmission timeout reached on transmission 62016a9603e0e2d91c784f9a34d35e5c@60.191.0.110:5060 for seqno 102 (Critical Request) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 32000ms with no response

Causes: Cisco firewall blocks SIP by default.

Solution: Remove the blockage from Cisco Firewall. 
Attached:
1: CiscoFW.gif shows the default blockage of SIP
2: sipRegistry.gif shows normal extension status of registration after remove the blockage.

Vidanetwork Technologies, Inc.

Attachments:
CiscoFW.gif CiscoFW.gif
sipRegistry.gif sipRegistry.gif

 
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Article details
Article ID: 28
Category: Problems and Troubleshooting
Date added: 2016-01-23 09:06:51
Views: 1631
Rating (Votes): Article rated 2.7/5.0 (135)

 
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