17.75. TGRE - Control LCR rerouting on the basis of cause values 
Feature:
LCR rerouting
Selective trunk group selection during device search
Signaling in the C-Tel signaling mediation device (CSMD)
Function:
COT parameter TGRE can also be used to vary the LCR rerouting administered by the
AMOs
RICHT and LDAT during an outgoing trunk seizure.
If the TGRE parameter is set in the COT of a trunk, then rerouting is only carried
out
during the LCR process if one of the following cause values is entered in the release
message:
|
Q931
Q850:
Cause no
|
CorNet:
Cause no
|
Cause
|
|
01
|
01
|
Unallocated (unassigned) number
|
|
03
|
03
|
No route to destination
|
|
22
|
22
|
Number changed
|
|
44
|
44
|
Requested trunk/channel not available
|
If the TGRE parameter is not set in the COT of a trunk, then rerouting is only carried
out
during the LCR process if one of the following cause values is entered in the release
message.
|
Q931
Q850:
Cause no
|
CorNet:
Cause no
|
Cause
|
|
03
|
03
|
No route to destination
|
|
06
|
06
|
Channel unacceptable
|
|
33
|
Private
|
Trunk out of order
|
|
34
|
34
|
No trunk/channel available
|
|
38
|
38
|
Network out of order
|
|
41
|
41
|
Temporary failure
|
|
42
|
42
|
Switch equipment congestion
|
|
44
|
44
|
Requested trunk/channel not available
|
|
47
|
47
|
Resource unavailable
|
|
Private
|
Outgoing calls barred
|
|
|
63
|
63
|
Service or option not available, unspecified
|
|
82
|
82
|
Identified channel does not exist
|
|
102
|
102
|
Recovery on timer expiry
|
|
Network congestion
|
AMO Interrelationships:
AMO RICHT
REROUT: YES ... RTE suitable for rerouting
AMO LDAT Administration of LCR routes
LCR attribute LATTR: PRIMRTE .... Trunk group only first primary route
REROUTE .... Trunk for reroute only
IMPORTANT:
LCR attributes PRIMRTE and REROUTE cannot both be set at the same
time!
Device types:
Digital CO trunk circuits, interface circuits and tie trunk circuits
For example, SOCOD, S2COD, SOCONN, S2CONN, etc.
Protocol variants:
CORNV33 - CorNet protocol
CORNV33R - CorNet protocol
ECMA1 - ECMA QSIG V1 protocol
ECMA1R - ECMA QSIG V1 protocol
ECMAV2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ETSI
ECMAV2R - QSIG ETSI ETS 300 172 3rd. with SS 2nd.
PSS1V2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ISO/IEC
PSS1V2R - QSIG ISO ISO/IEC 11572 2nd. with SS
EDSGER - EDSS1 protocol for Germany
ETSI - Standard EURO-ISDN
EDSS1NET - EDSS1 Net Side protocol