TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
Issue 4 May 2002
10-1679 555-233-123
Level 1 Status Inquiry Test (#1242)
This test is non-destructive.
This test determines the state of the transmission facility of a BRI port at the
Level 1 (L1) physical layer: Activated, Pending Activation, or Deactivated.
The Activated state is the correct state for an ISDN-BRI port. In this state the L1
interface can send and receive synchronized signals. This test passes if the state
of L1 is Activated. This test also passes if software has taken this port out of
service. See the description of the L1 “Deactivated State” below for more details.
The Pending Activation state indicates a problem with the channels, the wiring, or
the TBRI-BD circuit pack. When in this state, the Level 1 interface is either not
receiving any L1 framing from the channel, or it is communicating with the channel
but cannot transition to the Activated state.
The Deactivated state indicates a problem with the TBRI-BD circuit pack. When in
this state, the Level 1 interface is not active, and an idle signal is transmitted to the
channels or that Layer 1 was deactivated by the switch. When an TBRI-PT port is
placed in the out-of-service state, Level 1 is also put into the Deactivated state.
This could be due either to the system detecting a fault with the port or to a
busyout port PCSSpp request.
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