Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
149
“Local problems” concerning call forwarding
21.10Reject calls
Every time a call is routed, the VoIP Gateway will try to find routes with suitable Maps and
to switch the call accordingly. If no suitable Map entry is found in the routing table or if all
call attempts fail, the call will finally be rejected.
Sometimes though, it is useful to explicitly reject certain calls by making an entry in the
routing table. This can be done by setting up a route to “DISC” in the destination drop-
down list. The reason for rejection can then be specified in the “DISC cause” field.
A list of the defined reasons for rejecting calls can be found in Appendix C. The value
specified in the “Error code (decimal)” column must be used.
21.11QSIG Interworking
QSIG Interworking allows a call originating in an H.323 network to be terminated in a
QSIG network and vice-versa. It includes some interworking supplementary services, see
table below.
In order to use QSIG Interworking:
• the protocol at the affected ISDN interface must be configured to QSIG ECMA 2.
• the checkmark “Interworking (QSIG)” must be enabled at the voice routes (actually at
the maps) that lead from the gateway into the PBX. Remember to enable the
checkmark at the opposite routes (from the Gateway into the PBX).
• the Gateway must not be used to modify or to patch called numbers (CDPN) and/or
calling party number (CGPN). If this limitation is not regarded, Call Completion and
Call Diversion cannot be interworked.
Error code (decimal) Description
34 No circuit/channel available
38 Network out of order
41 Temporary failure
42 Switching equipment congestion
44 Requested circuit/channel not available
47 Resources unavailable, unspecified
49 Quality of service unavailable
Feature Standard Messages
Name Display
(readable user names)
ECMA 164 callingName, calledName,
connectedName
Call Completion
– to busy subscriber
– with no reply
ECMA 186 ccnrRequest, ccbsRequest, ccCancel,
ccExecpossible, ccPathReserve,
ccRingout
A subset of call Transfer
(actually name Display)
ECMA 178 CallTransferComplete
A subset of Call Diversion ECMA 174 checkRestriction, callRerouting,
divertingLegInformation1,..2,..3