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 Servers > Server Types > WebSphere application servers > server_name > SIP container settings > SIP container > SIP stack > SIP timers.

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
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Last updated: April 17, 2014 04:48 PM CDT
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