Nortel BCM 3.7, Manual

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506 Dialing plans for T1 lines
N0008589 3.3
Figure 179 Routing service record: Destination code
Destination code numbering in a network
Because the system checks the initial digits of a call against the routing tables, each type of
internal or external call must begin with a unique pattern of digits. The following table gives a
sample plan for how initial digits are assigned in a network of systems with three-digit intercom
numbers.
In the table shown above, 4 is used as the initial digit for the coordinated dialing plan, but 5, or 6
can also be used for this purpose
TIPS: When programming a button to dial a Network number automatically (autodial), network
calls must be programmed as external autodial numbers, even though they resemble internal
extension numbers.
Routes generally define the path between the Business Communications Manager system and
another switch in the network, not other individual telephones on that switch.
Table 111 Destination code leading digits
Leading Digits Use
0 Network Direct Dial
221-253 Intercom calls
4 Coordinated Dialing Plan
5 Unused
6 Unused
8 Call Park Prefix
9 All PSTN Calls
Routing service (continued)
Dest code (Services: Routing Services: Dest Codes
Service Schedule Normal Schedule
DestCode
(max. 12 digits) Use route
(001-999) Absorb
Length 1sr route
(001-999) Absorb
Length 2nd route
(001-999) Absorb
Length 3rd route
(001-999) Absorb
Length
30 100 0 000 All 000 All 000 All
31 101 0 000 All 000 All 000 All
32 102 0 000 All 000 All 000 All
33 103 0 000 All 000 All 000 All
Create unique code Specify which route to use
Add Destination code to
dialout out string