Call Dropping after 5 min via SIP trunk - Carrier Response 420 Bad Extension

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Applicability
  • Firmware version: 20.19.0.47
  • Model: Standard V6, U-Series
 
Problem Description
Call dropping after 5 mins, then SIP provider response "420 Bad Extension".
 
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Analysis
Further analysis indicated that the "timer" field is unsupported.
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Solution
Customized the script to disable the timer require.
Step 1: login device via ssh 
https://support.yeastar.com/hc/en-us/articles/225066728-How-to-Login-the-SSH-of-Yeastar-MyPBX 
 
Step 2: enter the following command 
vi /persistent/etc/sip_extend.conf
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Step 3: Input letter "i" and the paste the following script
[general]
disablerequiretimer=yes
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Step 4: Press "ESC" on keyboard and Input ( :wq ) and Enter
 
Step 5: Make any change on web and click the "Apply Changes" button or reboot the device to take effect the script.
 
 
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1 Comments

Date Votes
  • 0
    Avatar

    I have the same problem on a s300 and tried this solution but sip_extend.conf doesn't exist. The calls drops after 15min

    Edited by husci
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