Q.921/Q.931 Timers

 

 

 

 

 

 

Table 15. Q.921 Timers (Level 2 Parameters) (Continued)

 

 

 

 

 

Data Type

Mnemonic

Definition

 

 

unsigned

n200

Maximum number of retransmissions. Default

 

short

 

value is 3.

 

unsigned

n201

Maximum number of octets in an I frame.

 

short

 

Currently the maximum is 240.

 

unsigned

n202

Maximum number of transmissions of a TEI

 

short

 

request message. Default value is 3.

 

unsigned

K

Maximum transmit window. Default value is 7;

 

short

 

maximum value is 127. BRI default is 1.

 

 

 

 

 

 

Table 16. Q.931 Timers (Level 3 Parameters)

 

 

 

 

 

Data Type

Mnemonic

Definition

 

 

IISDN_Q931_ q931

Structure that includes changes to the Q.931 timer

 

TIMERS

 

values, if any. A value of 0xFFFF disables the

 

 

 

timer. Setting a field to 0 causes the default to be

 

 

 

used. Some timers have two possible default

 

 

 

values depending on the connection type/variant

 

 

 

used. For example, if the variant field value is

 

 

 

IISDNvarCCITT in an L4L3mENABLE_

 

 

 

PROTOCOL message, or the conn_type field

 

 

 

contains an IISDNctCCITT value in an

 

 

 

L4L3mENABLE_D_CHANNEL message, the

 

 

 

CCITT default value below is used. For all other

 

 

 

connection type or variant values, the standard

 

 

 

default value is used.

 

unsigned

t302

Q.931 Overlap Receiving timer. Default value is

 

short

 

150 (15 seconds).

 

unsigned

t305

Q.931 Disconnect Request state timer. Default

 

short

 

value is 50 (5 seconds) and the ITU-T default value

 

 

 

is 300 (30 seconds).

 

unsigned

t308

Q.931 Release Request state timer. Standard

 

short

 

default value is 50 (5 seconds) and the ITU-T

 

 

 

default value is 40 (40 seconds).

 

unsigned

t313

Q.931 Connect Request state timer. Default value

 

short

 

is 50 (5 seconds) and the ITU-T default value is 40

 

 

 

(4 seconds).

 

unsigned

t314

Q.931 Segment message time. Default value is 40

 

short

 

(4 seconds).

 

unsigned

t316

Q.931 Restart Request state timer. Default value is

 

short

 

1200 (120 seconds).

 

 

 

 

 

November 2009

333

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Dialogic 6.2 manual Timers Level 2 Parameters, Data Type Mnemonic Definition, Timers Level 3 Parameters, November 333