Calls Drop after 12 Seconds - Abnormal SIP Contact from the other SIP Device

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Applicability

  • Firmware version: Any
  • Model: S-Series

Problem Description

PBX is interconnected with Alcatel OmniPCX PBX by SIP trunk. Incoming call to PBX is working fine, but outbound call fails.

 

Analysis

The CLI log shows S-Series PBX doesn't respond to 200OK of the IP Phone since its SIP contact format is abnormal which causes the call drop.

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As for the reason why the outbound call is fine, SIP contact of S-Series PBX is normal.

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Solution

Turn to the Alcatel support with log and issue descriptions and they would fix it on the phone side.

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