Acme Packet (MOSC)

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SIP OPTIONS Timeout

in Acme Packet (MOSC) Question

Hi,

I am trying to find out which parameters control a SIP OPTIONS to timeout.

My understanding was the following:

"init-timer" controls the retransmit rate doubling each time.

"init-timer" stop doubling once it reaches "max-timer".

"trans-expire" is the timeout value. Once "trans-expire" is reach, session-agent is considered down.

So base on my understanding and the following configuration, I would expect the following SIP OPTIONS messages.

sip-config

  init-timer            500

  max-timer             4000

  trans-expire          32

07:30:00.000 SBC send SIP OPTIONS to a non responding session-agent.

07:30:00.500 SBC resend SIP OPTIONS (retransmit)

07:30:01.500 SBC resend SIP OPTIONS (retransmit)

07:30:03.500 SBC resend SIP OPTIONS (retransmit)

07:30:07.500 SBC resend SIP OPTIONS (retransmit)

07:30:11.500 SBC resend SIP OPTIONS (retransmit)

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