Comdial DSU II Manual page 61

DSU II Digital Telephone System
The following information illustrates the digit evaluation scheme.
Quantity Of Digits
Dialed
2
3
4
7
8
10
11
The example below shows how calls to area code 202 are routed using line group 2, calls
to office code 202 are routed using line group 1, calls to office code 973 in area code 716
are routed using line group 4, and all other calls are routed using line group 1.
Entries Office
000–999 Code Table
000 1
001 1
002 1
202 1
212 1
973 1
997 1
998 1
999 1
The programmer can arrange for the system to insert up to eight digits (including * and #
as well as 0–9) ahead of a dialed number for a selected line group. Further, the
programmer can enter a pause of system-determined length as a character in the digit
string.
To help understand this digit insertion, review this typical arrangement for transparent
CENTREX operation (This example assumes that the CENTREX extensions do not
conflict with the office codes.): With the digital telephone system installed behind a
CENTREX system, callers can make outgoing calls without having to dial 9. Assume
Digit Evaluation
Actual Dialed Digits
67
118
5123
9782200
19782200
8049782200
18049782200
Routing Calls Through Different Line Groups
Special Tables For Selected Area Codes
(Each table is for office code entries in a specific area code.)
Area Code Area Code 1
Table (716)
1
1
1
2 1
1 1
4
1
1
1
Digits Evaluated By
System To Find Line
Group
067
118
512
978
978
804, 978
804, 978
Area Code 2 Area Code 3
( ) ( )
Digital Telephone System Features A – 61
IMI66–132
Area Code 4
( )