Nortel Networks OPTera Metro 3500 - Manual (Page 70)

2-32 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
VT assigned end-to-end connections necessarily possess the following
characteristics:
• For any given end-to-end VT connection, add and drop nodes must be
provisioned with VT connections and pass-through nodes must be
provisioned with STS connections
• If one VT end-to-end connection within an STS is provisioned as VT
assigned, then all of the VTs within that STS must be VT assigned
• All VT assigned end-to-end connections within an STS channel must
terminate (add/drop) at the same node
• All of the VTs within an STS channel must terminate (add/drop) at the
same node
VT BLSR with full VT access
OPTera Metro 3500 supports full VT access (Full VT mode) in a BLSR. When
an end-to-end connection is provisioned as Full VT, all nodes along the length
of the connection (add, drop, and pass-through) are VT connections. In
addition, VTs in a given STS can be added and dropped to and from any where
in the network. This optimizes bandwidth efficiency and provisioning
flexibility.
Note: Full VT mode is only supported in OC-48 BLSR rings wherein all
the nodes are OPTera Metro 3500 network elements equipped with
VTX-series circuit packs.
Traffic flow over OC-192 BLSR
OC-192 BLSR is supported on OPTera Metro 3500 shelves equipped with
OC-192 circuit packs in slots 11 and 12 and with STX-192 circuit packs in
slots 13 and 14.
STS BLSR
The STX-192 circuit pack supports STS-managed traffic only,
The BLSR topology of OPTera Metro 3500 supports interoperability with
OPTera Connect DX at the OC-192 line rate.