Knowledgebase

• GR-246, Issue 3, T1.111.3 SS7 Signaling Data Link (MTP Level 2), ANSI 1992.
• Q.701 SS7 (MTP), CCITT 1992.
• Q.703 SS7 Signaling Data Link, CCITT 1992.

The following messages may be received or transmitted by MTP2 across the line interfaces / line services:

• Message Signal Unit (MSU)
• Link Status Signal Unit (LSSU)
• Fill-In Signal Unit (FISU)

Variants

The following protocol variants are supported:

MTP2

• ITU (< ITU BLUE > used for ITU88)
• ITU92( < ITU WHITE > used for ITU92, ITU97, Q767, SINGAPORE and CHINA)
• ANSI88 (used for ANSI88)
• ANSI92 (used for ANSI92, ANSI96 and TELCORDIA)

MTP3

• ITU = (88, 92, 97, Q767 and SINGAPORE)
• CHINA
• ANSI = (88 and 92)
• ANSI 96 = (96 and TELCORDIA)

ISUP

• ITU = (88 and 92)
• ITU 97
• SINGAPORE
• ANSI 88
• ANSI 92
• ANSI 95
• TELCORDIA 97
• CHINA
• UK
• ETSI
• ETSIV3

Protocol variant compatibility