SIP Register Refresh Time

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Hi all,

question about register refresh time.

One of our supplier had a maintenance work on sat 4 Aug which was replacing the production server for an Asterisk 1.4 running version.

We have few Asterisk connected to them (version 1.6, 1.8 and 1.10) with register Username and Passwd. After the new server came up, no one of our Asterisks get registered back, which means no calls -incoming and outgoing- at all since this date 🙁

A sip show registry this morning (Mon 6 Aug) show us following:

Host dnsmgr Username Refresh State Reg.Time N MyUser 105 No Authentication Sat,04
Aug 2012 16:55:37

A simple sip reload made thinks working again.

Why our Asterisks didn’t get back for registration, refresh register time being the standard 120 seconds?

Thanks for your explanation