Polycom EX Manual De Referencia

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Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
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ISDN Error Codes
The following table describes codes that the ISDN switch sends to 
the router to indicate call status. Although the codes are 
standardized, each ISDN service provider defines them differently. 
Because of this, the definitions in the table may not exactly match 
the messages that appear on your monitor.
Table 6-7.  ISDN Call Status Codes
Code
Cause 
Definition
1
Unassigned 
number
The switch received the sent ISDN number 
in the correct format, but no destination 
equipment uses the number.
2
No route to 
specified transit 
network
The ISDN exchange does not recognize the 
intermediate network through which to route 
the call.
3
No route to 
destination
The intermediate network through which the 
call is routed does not serve the destination 
address.
6
Channel 
unacceptable
The specified channel does not provide 
adequate service quality to accept the 
requested connection.
7
Call awarded 
and delivered
The user is assigned an incoming call that is 
being connected to a call channel that has 
already been established for this user and 
this type of call.
16
Normal call 
clearing
The originator or receiver of the call has 
requested that it be cleared.
17
User busy
All B channels are in use; the called system 
acknowledges the connection request, but is 
unable to accept the call.
18
No user 
responding
The destination equipment does not 
respond to the call, so the connection 
cannot be completed.
19
No answer from 
user (user 
alerted)
The destination equipment did not complete 
the connection within the prescribed time 
after responding to the connection request. 
The problem is at the remote end of the 
connection.