Isdn Switches; Isdn Errors - Polycom Viewstation 128 User Manual

ISDN Switches

Depending on the type of ISDN lines you are using, your service provider may
assign zero, one, or two SPIDs per line.
International (outside United States or

ISDN Errors

The following table describes ISDN standard cause values that are sent from the
ISDN switch to the router to indicate ISDN call status. Although the cause
values are standardized, each ISDN service provider phrases the cause
differently. Therefore, the causes shown in the table might not be the exact
messages that appear on your television monitor.
Code Cause
1 Unassigned number
No route to specified
2
transit network
3 No route to destination
6 Channel unacceptable
Call awarded and
7
delivered
16 Normal call clearing
17 User busy
18 No user responding
ViewStation User's Guide
Switch Type
AT&T 5ESS Custom
AT&T 5ESS NI-1
NT DMS-100 NI-1
NI-2
Siemens EWSD NI-1
Siemens EWSD NI-2
Canada)
ISDN Errors
The switch received the sent ISDN number in the correct format;
however, no destination equipment uses the number.
The ISDN exchange can not recognize the intermediate network
through which to route the call.
The destination address is not serviced by the intermediate network
through which the call is routed.
The specified channel does not provide sufficient service quality to
accept the requested connection.
The user is assigned an incoming call that is being connected to an
already-established call channel.
Normal call clearing has occurred.
All B channels are in use; the called system acknowledges the
connection request, but is unable to accept the call.
The destination does not respond to the call so the connection
cannot be completed.
ISDN Information
SPIDs Allocated
None
1 per B-channel
1 per B-channel
1 per device
1 per B-channel
1 per device
None
Definition
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