This test determines the current status of the signaling link. This test passes if the link is “bound” to an endpoint and fails if the link is not bound.

The definition of the term “bound” for a link depends upon the type of endpoint and may depend on the successful completion of procedures at both Layers 2 and 3 of the protocol. The definition of “bound” for each type of endpoint is as follows:

• BRI endpoints administered for MIM (management information messages) initialization (multipoint).

  Note:

  An MIM is a level 3 message that conveys management and maintenance information between a communications system and a BRI terminal.

  For endpoints of this type, the signaling link is bound when the link is connected at Layer 2 and the link has been associated with an endpoint, [that is, the endpoint has completed SPID initialization (L3 established)].

• ASAI adjuncts and BRI endpoints not administered for MIM initialization (point-to-point).

  For endpoints of this type, the signaling link is “bound” when the link is connected at Layer 2 (L2 established).

For every endpoint type, a signaling link becomes unbound when it is disconnected at Layer 2. For BRI endpoints supporting MIM initialization, a signaling link may also become unbound if a subsequent attempt to perform SPID initialization on a bound link fails (that is, wrong SPID is entered into the endpoint by the user).

This test runs on ASAI-EPT (ASAI Endpoint) and BRI-SET, Various Adjuncts.