Polycom 2000 User Manual
Appendix A-Disconnection Causes
A-10
ISDN Disconnection Causes
Table A-2
ISDN Disconnection Causes
Disconnection Cause
Number
Summary
Description
1
Unallocated
(unassigned
number)
(unassigned
number)
No route to the number exists in the ISDN
network or the number was not found in the
routing table.
network or the number was not found in the
routing table.
•
Ensure that the number appears in the
routing table.
routing table.
•
Ensure that it is a valid number and that
correct digits were dialed.
correct digits were dialed.
2
No route to
specified transit
network
(national use)
specified transit
network
(national use)
The route specified (transit network) between
the two networks does not exist.
the two networks does not exist.
3
No route to
destination
destination
No physical route to the destination number
exists although the dialed number is in the
routing plan.
exists although the dialed number is in the
routing plan.
•
The PRI D-Channel is malfunctioning.
•
Incorrect connection of the span or WAN.
4
Send special
information tone
information tone
Return the special information tone to the
calling party indicating that the called user
cannot be reached.
calling party indicating that the called user
cannot be reached.
5
Misdialed trunk
prefix (national
use)
prefix (national
use)
A trunk prefix has erroneously been included in
the called user number.
the called user number.
6
Channel
Unacceptable
Unacceptable
The sending entity in the call does not accept
the channel most recently identified.
the channel most recently identified.
7
Call awarded
and being
delivered in an
Established
channel
and being
delivered in an
Established
channel
The incoming call is being connected to a
channel previously established for similar calls.
channel previously established for similar calls.