Timers Configuration

To configure timers:

In Superuser mode, type configure terminal and press Enter.
```
ORACLE# configure terminal
```
Type session-router and press Enter.
```
ORACLE(configure)# session-router
```
Type sip-config and press Enter. The system prompt changes to let you know that you can begin configuring individual parameters.
```
ORACLE(session-router)# sip-config
ORACLE(sip-config)#
```
init-timer—Enter the initial timeout value in milliseconds for a response to an INVITE request, and it applies to any SIP request in UDP. In RFC 3261, this value is also referred to as TIMER_T1. The default is 500. The valid range is:
- Minimum—0
- Maximum—999999999
max-timer—Enter the maximum transmission timeout (T2) for SIP in milliseconds.

When sending SIP over UDP, a re-transmission timer is used. If the timer expires and the message is re-transmitted, the re-transmission timer is then set to twice the previous value (but will not exceed the maximum timer value). Using the default values of 500 milliseconds and 4000 milliseconds, the re-transmission timer is 0.5, then 1, 2, and finally 4. The incrementing continues until the transmission expire timer activates. The default is 4000. The valid range is:
- Minimum—0
- Maximum—999999999
trans-expire—Enter the transaction expire timeout value (Timer B) in seconds to set the time for SIP transactions to live. The same value is used for Timers D, F, H and J. The default is 32. The valid range is:
- Minimum—0
- Maximum—999999999
invite-expire—Enter the invite expire timeout value (Timer C) in seconds to indicate the time for SIP client transaction will live after receiving a provisional response. The default is 180. The valid range is:
- Minimum—0
- Maximum—999999999
inactive-dynamic-conn—Enter the inactive dynamic connection value in seconds to set the time limit for inactive dynamic connections.

If the connection between the SIP proxy and a session agent is dynamic (for example, through dTCP), and the connection has been idle for the amount of time specified here, the SIP proxy breaks the connection. Idle is defined as not transporting any traffic. The default value is 32. The valid range is:
- Minimum—0
- Maximum—999999999
  
  Note:
  Setting this parameter to 0 disables this parameter.
The following example shows SIP config timer values for a peering network. Some parameters are omitted for brevity.
```
sip-config
        state                          enabled
        operation-mode                 dialog
dialog-transparency		disabled
home-realm-id                  acme
        egress-realm-id
        nat-mode                       Public
        registrar-domain
        registrar-host
        registrar-port                 0
        init-timer                     500
        max-timer                      4000
        trans-expire                   32
        invite-expire                  180
        inactive-dynamic-conn          32
```