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3.13.3
Channel Status
Comprehensive information about the call progress is available through the Channel Status
window. This window indicates the various stages each B-channel goes through whilst
establishing a connection.
Status -
Comments
BRI
Idle
the channel is idle
Calling
when calling — the network has acknowledged the call
Connected
when connection is established
Sync
when the channels are synchronized
Active
when all available channels are connected
Releasing
waiting for the network to confirm a release of the call
Released
when disconnected - the network has acknowledged the disconnection
Cause codes
The most common cause codes (for ISDN) are:
1
Unallocated (unassigned) number
2
No route to specified transit network (WAN)
16
Normal clearing
17
User busy
18
No user responding
21
Call rejected
28
Invalid number format (incomplete number)
29
Facility rejected
31
Normal, unspecified
34
No circuit/channel available
41
Temporary failure
58
Bearer capability not presently available
65
Bearer service not implemented
69
Requested facility not implemented
81
Invalid call reference value
88
Incompatible destination
100
Invalid information element contents
102
Recovery on timer expiry
127
Internetworking, unspecified
255
TANDBERG specific. undefined cause code
PRI Red Alarm
Red alarm or Loss of signal (LOS) means that there is no signal and thus no framing info
received (this has same effect as pulling out the PRI cable).
General Use
95
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