Nortel Meridian Meridian 1 Feature Description And Administration page 1394

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Figure 123
A scenario involving two SAT-Routes where VSIG = YES and SIGO is not set to STD
Figure 124
A scenario involving two SAT-Routes where VSIG = YES and SIGO is not set to STD
553-2901-301 Standard 9.00 January 2002
Network Signaling on Virtual Network Services
Referring to Figure 123, a call from Node 1 to Node 4 passes a Satellite
Route. The Satellite Count is updated at Node 2, and the Satellite information
is sent to Node 3. The route between Node 3 and Node 4 is also a Satellite
Route; therefore, the call is blocked at Node 3.
Referring to Figure 124, a call from Node 1 to Node 3 is initiated, and the call
is blocked at the Tandem Node. In this scenario, the Satellite information is
sent from Node 2 to the Tandem Node. The route between the Tandem Node
and Node 3 is also a Satellite Route; therefore, the call is blocked on the
bearer side of the Tandem Node.
VSIG = YES and SIGO is set to STD
Referring to Figure 125, a call from Node 1 to Node 4 passes a Satellite
Route, and the Satellite Count is updated at Node 2. The Satellite information
travels over the VNS D-Channel to Node 3. The route between Node 3 and
Node 4 is also a Satellite Route; therefore, the call is blocked at Node 3.
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