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Signaling System No. 7 (SS7/C7): Protocol, Architecture, and Services by Jeff Hewett, Lee Dryburgh

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Appendix A. MTP Messages (ANSI/ETSI/ITU)

The table in this appendix summarizes Message Transfer Part (MTP) messages and the purpose of each. The signaling network management (SNM) procedures of MTP3 generate MTP messages. For an introduction to MTP3, refer to Chapter 7, “Message Transfer Part 3 (MTP3).”

NOTE

Messages in Table A-1 are marked as (ITU) or (ANSI) when they have the same encoding and meaning but different naming conventions.

Table A-1. MTP Message Explanation and Codings

H1/H0 Code

MESSAGE NAME

PURPOSE

KEY:

(A) Messages supported in ANSI only (ANSI T1.111-2000). All others supported by ANSI and ITU (Q.704–1996).

Note: ETSI MTP [9] uses exactly the same message set and codings as ITU-T.

0 0 0 1 0 0 0 1

COO

Changeover Order

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