Liaison statement
Liaison Statement to CCAMP on GMPLS Calls

Thank you for your careful response.  The assumptions about the GMPLS call
being as general as possible are noted, and we are interested to know what
other call applications there may be in addition to ASON and the CCAMP VCAT
draft. The description given of how information relevant to Call Controllers is
transparent in the network (between call boundaries, and to the means of
delivering the call message) is consistent with our understanding.  However,
TNA information while “not used in the propagation or delivery of the
message� is used to identify the destination UNI and hence Network Call
Controller, and may by used at ENNIs to also determined the next Network Call
Controller in the sequence of call segments that constitute the call. We would
appreciate guidance on how to carry ASON call information across a GMPLS
network so that it can be reconstructed at ASON call boundaries.  This would
include communication between ASON UNI to UNI, UNI to ENNI, and ENNI to ENNI
(both over a link between domains and across a GMPLS domain).  As mentioned in
the liaison, we support the resumption of work on a CCAMP I-D on ASON
applicability to address the above and would welcome the opportunity to
contribute through liaisons.

An electronic copy of this liaison statement is available at:
ftp://ftp.itu.int/tsg15opticaltransport/COMMUNICATIONS/index.html>