Eicon Networks ISDN NT1 Especificaciones descargar pdf (Pagina 16)

• Do all the ISDN networks traversed by the call support the requested Bearer

Capabilities?

• Does the PBX equipment at each end support these Bearer Capabilities?

• Has it been enabled?

• Has it been enabled for the port in question?

Bearer Capabilities - An example – 1

Consider this example of the subtleties of Bearer Capability requirements.

A user of an ISDN PBX (ISPBX) may have no problem making analogue calls, yet

experience difficulties sending faxes. The Bearer Capability required to send a fax might

be:

• Enabled for the port in use on the remote PBX

• Available as a facility on the local and remote PBX

• Supported by the local and remote providers

• Enabled for various ports on the local PBX

• But not enabled on the particular PBX port experiencing the problem.

The chain of enabled Bearer Capabilities must be complete for the service to be operable.

In this instance, the PBX will refuse to recognise the outgoing fax calls from the local port.

Bearer Capabilities - An example – 2

Examining a diagnostic trace for this scenario would reveal this, since the cause code

reported would indicate that the service being requested is "not available" or "not

permitted". It is potentially available, of course, but not for this call on this port.

The solution in this instance would be to enable the particular function required on the port

in question. This would normally require that the PBX be re-configured:

Bearer Capabilities - An example – 3

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Eicon Networks ISDN NT1 Especificaciones Pagina 16