SIP timers settings
Use this page to set values for the Session Initiation Protocol (SIP) timers that are different from those specified in RFC 3261. SIP timers provide a mechanism for session expiration.The default values are the same as those specified for RFC 3261.
To view this administrative console page, click
.The following SIP timers can be configured from the administrative console.
T1
Specifies the amount of time, in milliseconds, for a network round trip delay for timer T1 according to the RFC 3261 specification. The value is used as a base for calculating some timers and is relevant for all types of transactions, such as client, server, invite, and non-invite transactions.
Information | Value |
---|---|
Data type | Integer |
Default | 500 |
- A
- Specifies, for UDP only, the amount of time, in milliseconds,
before retransmitting invite requests for timer A according to the
RFC 3261 specification. This setting is relevant for the invite client
transaction.
Information Value Data type Integer Default T1 - B
- Specifies the amount of time, in milliseconds, for the invite
client transaction timeout timer (timer B) according to the RFC 3261
specification.
Information Value Data type Integer Default T1*64 - E
- Specifies, for UDP only, the amount of time, in milliseconds,
before the retransmission of the initial non-invite request for timer
E according to the RFC 3261 specification. This setting is relevant
for the non-invite client transaction.
Information Value Data type Integer Default T1 - F
- Specifies the amount of time, in milliseconds, for the non-invite
transaction timeout timer (timer F) according to the RFC 3261 specification.
This setting is relevant for the non-invite client transaction.
Information Value Data type Integer Default T1*64 - G
- Specifies the amount of time, in milliseconds, before retransmission
of an initial invite response for timer G according to the RFC 3261
specification. This setting is relevant for the invite server transaction.
Information Value Data type Integer Default T1 - H
- Specifies the amount of time, in milliseconds, to wait for an
acknowledgement (ACK) receipt for timer H according to the RFC 3261
specification. This setting is relevant for the invite server transaction.
Information Value Data type Integer Default T1*64 - J
- Specifies the amount of time, in milliseconds, to wait for non-invite
request retransmission for timer J according to the RFC 3261 specification.
This setting is relevant for the non-invite server transaction.
Information Value Data type Integer Default T1*64
T2
Specifies the maximum amount of time, in milliseconds, before retransmitting non-invite requests and invite responses for timer T2 according to the RFC 3261 specification.
Information | Value |
---|---|
Data type | Integer |
Default | 4000 |
T4
Specifies the maximum amount of time, in milliseconds, for a message to remain in the network. This value is used as a base for calculating other timers for timer T4 according to the RFC 3261 specification.
Information | Value |
---|---|
Data type | Integer |
Default | 5000 |
- I
- Specifies the amount of time, in milliseconds, to wait for an
ACK retransmission for timer I according to the RFC 3261 specification.
This setting is relevant for the invite server transaction.
Information Value Data type Integer Default T4 - K
- Specifies the amount of time, in milliseconds, to wait for non-INVITE
response retransmissions for timer K according to the RFC 3261 specification.
This setting is relevant for the non-invite client transaction.
Information Value Data type Integer Default T4
D
Specifies the amount of time to wait, in milliseconds, before retransmission of the invite response for timer D according to the RFC 3261 specification. This setting is relevant for the invite client transaction.
Information | Value |
---|---|
Data type | Integer |
Default | 32000 |