Samsung Officeserv 7100 Technical Manual page 71

OfficeServ 7100
TECHNICAL MANUAL
Tandem Trunking
If the networked switches are in different area codes, e.g.
Switch 001 is 561
Switch 002 is 954
Switch 003 is 305
then calls from one switch can be routed over the network link and sent over as local
calls. For example if a user in Switch 001 wants to call a number in the 305 area code
the call could be routed over the network link to switch 003 and sent out as a local call.
This is called Tandem Trunking.
To achieve this, LCR entries must be created to route the calls as described by
modifying the digits and routing the call across the network link.
• Create LCR entries for each networked Switch area codes.
E.g. for Switch 001 these would be:
Digits
1954
1305
• Create the LCR routes with the digits modified to reflect 7 digit dialing in 954 area
code and 10 digit dialing in 305 area code.
Eg. for Switch 001 these would be:
Route
05:1
06:1
• Create the modifying digits entries as described in step 2.
Eg. for Switch 001 these would be:
Entry
002
003
These modify digit entries convert the digits dialed by the user into a digit string that
will let the destination switch route the call through the DID translation table (MMC 714)
to the appropriate local trunk group. This is the group already set up in LCR before
networking was applied to allow local calls to be sent out of that switch. For example in
switch 001 if local calls go out over trunk group 800 there would be an entry in MMC
714 for digits 561 (switch 001's home area code) to "ring" 800 for each of the ring
plans.
Length RT
11 05
11 06
Class Group
1 802
1 803
Del I
01 0029
01 0039
2.8.10
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SPECIAL APPLICATIONS
PART 2 JANUARY 2009
Modify
002
003
A
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