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SRS-2100 Q.931 Logging Codes ( Appendix F
Page F-2
Definitions of the different fields
shown in the normal format of the
History mode follow:
nT>N: Transmission message
identifier for terminal-to-
network messages. The
value n is 1 for voice calls
and 2 for data calls. This
identifier is followed by
the abbreviated message
and a list of up to six
related information element
codes. Table F-1 explains
the different abbreviated
messages. Table F-2 lists
and defines the
information element codes.
nN>T: Reception message
identifier for network-to-
terminal messages. The
value n is 1 for voice calls
and 2 for data calls. This
identifier is followed by
the abbreviated message
and a list of up to six
related information element
codes. Table F-1 explains
the different abbreviated
messages. Table F-2 lists
and defines the
information element codes.
CR: Call reference number