Do we have any MMS Recommendations in the works
Campos, Simao
simao.campos at ITU.INT
Fri Apr 19 11:37:28 EDT 2002
Dear experts,
I'd like to check my interpretation of the format of the BearerCaps IE
for a Setup message for call-independent signalling connections. Per
H.225.0 7.2.2.1: "If this information element appears in a Setup
message for a call-independent signalling connection as defined in
Recommendation H.450.1, the coding shall follow 7.2/H.450.1."
Normally this IE will have octets 3, 4, and 5, and if multirate, also
octet 4.1, for length of either 5 or 6 octets. But for the signalling
only connection, 7.2/H.450.1 states: "...the coding defined in Q.931
shall apply for octets 1 to 2 and bit 8 of octets 3 to 4. Information
transfer capability, Transfer mode and Information transfer rate shall
be encoded as indicated and no other octets shall be included." So for
this case we have only octets 1 to 4, with a length therefore of 4
octets. Taking this with the bit 8 coding from Q.931, it appears that
for the signalling case the BearerCaps IE should contain octets 3 and 4
with values:
3: 0xA8
4: 0x80
Does this seem correct?
--
best regards,
miner
--------------------------------------+------------------------
Miner Gleason, Software Engineer | | |
mgleason at cisco.com | :|: :|:
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