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Error reference · Asterisk

Asterisk: No response received from 'sip:sip.provider.com' on registration attempt to…

No response received from 'sip:sip.provider.com' on registration attempt to 'sip:74951234567@sip.provider.com', retrying in '60'

What it means

Asterisk sends REGISTER to the provider and gets nothing back at all.

Why it happens

  • Wrong server address or port (some providers use 5068, 5080 or TLS on 5061).
  • Outbound UDP 5060 blocked by your hosting or the office router (or SIP ALG mangling packets).
  • The provider blocked your IP after failed attempts.

How to fix it

  1. Check the host and port with the SIP check tool and against the provider’s guide.
  2. Try transport=tcp; turn off SIP ALG on the router.
  3. Ask the provider whether your IP is blocked.

Useful tools

SIP server check · Provider settings · SIP trunk generator

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