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Configuring SIP Timers

You can configure two BSG SIP timers to generate timeouts. Timer C generates an INVITE transaction timeout that is used when the INVITE request does not generate a final response and all resources are not released. The BSG supports Timer C as defined in RFC 3261 “SIP: Session Initiation Protocol.” When Timer C expires, a Cancel is sent to the caller and a 408 error message (Request timeout) is sent to the call recipient. The BSG also supports a timer that controls the maximum time a call can be inactive (signaling inactive). When this timer expires, a BYE is sent to the caller and the call recipient.

Step-by-Step Procedure

To configure SIP timers:

  1. Access the SIP configuration for the BSG.
    user@host#edit services border-signaling-gateway gateway bsg-1 sip
  2. Access the SIP timer function.
    [edit services border-signaling-gateway gateway bsg-1 sip]
    user@host#edit timers
  3. Configure Timer C.
    [edit services border-signaling-gateway gateway bsg-1 sip timers]
    user@host#set timer-c 120
  4. Configure maximum call duration..
    [edit services border-signaling-gateway gateway bsg-1 sip timers]
    user@host#set maximum call duration 72000
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