2.5.2.2. Digital Line Circuits 
Digital line circuits that signal incoming traffic with ANY_CHANNEL
(for example, connections to fax servers) require special configuration
for incoming traffic:
- Each line circuit must be configured in a separate trunk group.
- As usual, these trunk groups are grouped together to form an LCR route for outgoing traffic (as described under LCR).
- Afterwards, each of these trunk groups must also be assigned an individual route (AMO RICHT).
- A separate LDAT entry must be created for each of these routes (AMO LDAT).
INFO:
Each trunk group configured in AMO RICHT must have an LDAT entry. If this is not done
the
following advisory message is displayed each time when changing, adding, displaying
or
deleting
LDAT:
H25: NOT ALL TRUNKS ENTERED IN RICHT ARE CONFIGURED IN LDAT(LROUTE:@@@@@) TOO
THIS CAN LEAD TO PROBLEMS FOR TRUNK B-CHANNEL SEARCH,
THIS IS ESPECIALLY IMPORTANT FOR IP-TRUNKING TO WORK CORRECTLY.
!! ALL TRUNKS CONFIGURED IN RICHT SHOULD BE ENTERED IN LDAT !!
Example:
A configuration is connected to the OpenScape 4000 with three
line circuits. The examples only contain the parameters essential for
comprehension.
- Add trunk
groups:
AD-BUEND: TGRP=<bunr1>,NO=<B-channel number>,NAME="<trunk group name>"; AD-BUEND: TGRP=<bunr2>,NO=<B-channel number>,NAME="<trunk group name>"; AD-BUEND: TGRP=<bunr3>,NO=<B-channel number>,NAME="<trunk group name>";
- Add line
circuits:
AD-TDCSU:PEN=<pen1>,DEV=<S0CONN/S2CONN>, TGRP=<bunr1>,BCNEG=N,...; AD-TDCSU:PEN=<pen2>,DEV=<S0CONN/S2CONN>, TGRP=<bunr2>,BCNEG=N,...; AD-TDCSU:PEN=<pen3>,DEV=<S0CONN/S2CONN>, TGRP=<bunr3>,BCNEG=N,...;
- Add an outgoing route to the
server:
AD-RICHT:LRTE=<lrtgnr>,TGRP1=<bunr1&tgrp2&tgrp3>,...;
- Add outgoing LCR
routes:
AD-LDAT:LROUTE=<lrtgnr>,TGRP=<bunr1>,...; AD-LDAT:LROUTE=<lrtgnr>,TGRP=<bunr2>,...; AD-LDAT:LROUTE=<lrtgnr>,TGRP=<bunr3>,...;
- Finally add additional routes for incoming traffic with "Any
Channel":
AD-RICHT:LRTE=<lrtgnr_b1>,TGRP1=<bunr1>,...; AD-RICHT:LRTE=<lrtgnr_b2>,TGRP1=<bunr2>,...; AD-RICHT:LRTE=<lrtgnr_b3>,TGRP1=<bunr3>,...;
- To conclude, add the associated LCR routes for incoming
traffic:
AD-LDAT:LRTE=<lrtgnr_b1>,TGRP=<bunr1>,...; AD-LDAT:LRTE=<lrtgnr_b2>,TGRP=<bunr2>,...; AD-LDAT:LRTE=<lrtgnr_b3>,TGRP=<bunr3>,...;
Explanation:If CHI=ANY CHANNEL appears in an incoming SETUP, the trunk group entry is used to determine the route last configured for this trunk group. The mechanisms used for an outgoing connection are applied to this route to find an available B channel.