User's Manual

3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 257/346
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Note: In the case of modifying the amount of enabled BRA-ISDN port at any WW-NT\ISDN, its existing
cross-connection for B-channels transport has to be removed and a new one has to be created
according to the new condition. This could even cause other cross-connections to be re-alloca-
ted (removed-created) in order to provide for enough bearer capacity in consecutive time slots at
a certain GXDI E1 link.
Note: A 7390 platform identifies n*64 Kbits/s transport services, not presenting any link with ISDN rela-
ted resources (i.e. OWSA-channels, B channels).
• One free time slot of the selected TNT port in ISDN configuration can be cross-connected to
the signalling time-slot on the NT side.
• It is not possible to create a B-channel ISDN cross-connection if there is not created first a
signalling cross-connection.
• It is possible to cross-connect up to 8 free time-slots of the selected port and up to 8 B-
channels of the 4 ISDN-BA user port, but just 1 cross-connection by NT port. Then, it is pos-
sible to have 4 B-channel cross-connections by port.
• 2 cross-connections cannot coexist over the same NT port. So, if there is a B1 cross-con-
nection and the user wants to do a B1+B2 cross-connection, he has to remove the B1
cross-connection before creating the B1+B2 cross-connection.