Technical Specifications
10-44 Issue 8.0 July 2002
Provisioning TL1 Autonomous Messages for
Release 5 and Later Releases 10
In Release 5 and later releases, up to eight logical channels (two PVCs and up to
six SVCs) are supported. All logical channels may be used for
command/response messages. In addition, TL1 autonomous messages are
optionally available on all of the logical channels via user provisioning. There are
four OS types, that can be provisioned per PVC logical channel. An OS type is a
filter that determines the types of TL1 autonomous messages that appear at a
logical channel.
For SVCs, the OS type is provisioned indirectly, in conjunction with the X.25
calling address. The user can specify what OS type to associate with a given
X.25 calling address. When an SVC is set up using one of the provisioned calling
addresses, then the call is assigned the associated OS type. If the SVC does not
supply an X.25 calling address or if the X.25 calling address does not match any
of the provisioned X.25 calling addresses, then command/response only is
assumed.
When an OS establishes an SVC call, an available SVC is selected by the packet
network. The user does not control SVC selection.
DTE Configuration 10
At the packet layer, the FT-2000 OC-48 Lightwave System is configured as a
passive data terminating equipment (DTE) with the parameters listed in
Table 10-20.
Table 10-19. X.25/TL1 Interface – SVC Assignments (Through Release 4.1)
Logical
Channel # Use
3 Command/Response Messages
4 Command/Response Messages
5 Command/Response Messages
6 Command/Response Messages
7 Command/Response Messages
8 Command/Response Messages
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