Dialogic SS7G2X manual Signaling Gateway Timers Signaling Gateway-Specific Timers, MTP3 ITU Timers

Chapter 5 Parameter Definitions

5.3Signaling Gateway Timers

5.3.1Signaling Gateway-Specific Timers

Table 4 shows the Signaling Gateway specific timers. Timers for specific protocols are given in subsequent tables in this section.

Table 4. Signaling Gateway Specific Timers

T0	Range	Default	Description
	(seconds)	(seconds)
			Wait for board response guard timer. This timer starts when internal
			messages are sent to a signaling board and stopped when an
5	5 to 20	7	acknowledgement is received. On timer expiry, it reports an error. If the
			internal message sent to a board related to setting up a speech path for a
			call, then the call is released using internal token 135.
			MML wait for maintenance confirmation timer. The timer is started when a
7	2 to 10	3	MML maintenance request is performed. It is stopped when a confirmation
			from the remote site to the maintenance request is received. On timer
			expiry, a confirmation to the request is internally generated allowing
			further MML commands to be entered.

5.3.2MTP3-Specific Timers MTP3 ITU timers are given in Table 5.

Table 5. MTP3 ITU Timers

TO	Range	Default	Description
	(milliseconds)	(milliseconds)
1	500 to 1200	1000	Delay to avoid message mis-sequencing on changeover
2	700 to 2000	1500	Waiting for changeover acknowledgement
3	500 to 1200	1000	Time controlled diversion-delay to avoid mis-sequencing on
			changeback
4	500 to 1200	1000	Waiting for changeback acknowledgement (first attempt)
5	500 to 1200	1000	Waiting for changeback acknowledgement (second attempt)
6	500 to 1200	1000	Delay to avoid message mis-sequencing on controlled rerouting
10	30 to 60 sec.	45 sec.	Waiting to repeat signaling route set test message
12	800 to 1500	1200	Waiting for uninhibit acknowledgement
13	800 to 1500	1200	Waiting for force uninhibit
14	2000 to 3000	3000	Waiting to start signaling route set congestion test
17	800 to 1500	1000	Delay to avoid oscillation of initial alignment failure and link
			restart
22	180 to 360 sec.	270 sec.	Local inhibit test timer
23	180 to 360 sec.	270 sec.	Remote inhibit test timer
24	N/A	N/A	Reserved

MTP3 ANSI timers are given in Table 6.

Table 6. MTP3 ANSI Timers

	Range	Default
TO	(milli-		Description
		(milliseconds)
	seconds)
1	500 to 1200	1000	Delay to avoid message mis-sequencing on changeover
2	700 to 2000	1500	Waiting for changeover acknowledgement
3	500 to 1200	1000	Time controlled diversion-delay to avoid mis-sequencing on
			changeback
4	500 to 1200	1000	Waiting for changeback acknowledgement (first attempt)
5	500 to 1200	1000	Waiting for changeback acknowledgement (second attempt)

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