August 2004
Intermediate to advanced
744 pages
15h 41m
English
book
Signaling System No. 7 (SS7/C7): Protocol, Architecture, and Services
by Lee Dryburgh, Jeff Hewett
Content preview from Signaling System No. 7 (SS7/C7): Protocol, Architecture, and Services
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Appendix G. MTP Timers in ITU-T/ETSI/ANSI Applications
This appendix defines all MTP timers used in ITU-T, ETSI, and ANSI specifications. ITU-T timer values are specified in ITU-T Q.704 [53]. ETSI timer values are specified in ETSI EN 300 008-1 [9]. ANSI timer values are specified in T1.111-2001 [1].
Message Transfer Part 2 Timers
Table G-1 lists the Message Transfer Part 2 (MTP2) timers.
Table G-1. MTP2 Timers
Timer | Use | Range |
|---|---|---|
Note: ETSI [9] timers are identical to ITU-T timers. | ||
T1 | Timer “aligned/ready” | 40–50 s (ITU-T 64 kbps) 12.9–16 s (ANSI 56/64 kbps) 170 s (ANSI 1.5 mbps) |
T2 | Timer “not aligned” | 5–50 (low) s (ITU-T 64 kbps) 70–150 (high) s (ITU-T 64 kbps) 25–350 s, 300 s nominal (ITU-T 1.5/2 Mbps) 5–14 (low) s, nominal 11.5 s (ANSI 56/64 kbps) 16–30 (high) ... |
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