3Com CoreBuilder 9000, User Manual

Page: 363 / 468

Signaling — External Links 363
Timer Resolution All the timers in the Q.2931 and Q.SAAL protocol are based on a
common timer tick-length called the
timer resolution
. When the timer
resolution is changed, all timers are affected.
The CoreBuilder 9000 ATM Enterprise Switch is shipped with a default
timer resolution of 500 msec (.5 secs). To change the value of an
individual timer, you need to change the timer resolution proportionally.
For more information, see “Update Protocol Timer Resolution” on
page 199.
Table 47 Q.2931 Watchdog Timers — Network End
Timer
Name Default
Time-out
Start Timer Stop Timer
T303 20 SETUP sent CONNECT, CALL
PROCEEDING or SETUP
ACK received
T308 150 RELEASE sent RELEASE COMPLETE or
RELEASE received
T309 50 SAAL abort SAAL returned to active
state
T310 50 CALL PROCEEDING
received CONNECT or
DISCONNECT received
T313 20 RELEASE received sent RELEASE COMPLETE
received
T316 600 PORT RESTART sent RESTART ACKNOWLEDGE
received
T316c 450 VCC RESTART sent
T317 450 RESTART received Cancel all call references
T322 20 STATUS ENQUIRY sent STATUS DISCONNECT,
RELEASE, or RELEASE
COMPLETE received
T398 20 DROP PARTY sent DROP PARTY
ACKNOWLEDGE or
RELEASE received
T399 70 ADD PARTY sent ADD PARTY
ACKNOWLEDGE, ADD
PARTY REJECT, or
RELEASE received
TDISC 450