MERLIN LEGEND Communications System Release 6.1 | Issue 1 |
Network Reference 555-661-150 | August 1998 |
2 Call-Handling Scenarios | |
Network Configuration Scenarios | Page 2-90 |
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Non-Local Dial Plans and Facilities Planning | 2 |
This section summarizes non-local dial plans, switch identifiers, UDP routing, and ARS routing for each system. Not all details are provided for all facilities and extensions. Remote access information has been discussed in earlier scenarios.
Table 2–23, page 2-92 shows some applicable extension ranges, patterns, and routes for pooled facilities when people in one system call people at another private network system. Some UDP routes are reserved for video and data calls.
System O users do not access video extensions on System N; these extensions are not included in the System O non-local dial plan. Similarly, no high-speed 2B data is sent from System N to System O. Any such data is reviewed at headquarters (System A) before it is sent to back-office operations at System O.
To avoid numbering conflicts, system managers at Systems N and O program the first 4 digits of the System A 5-digit DEFINITY ECS or DEFINITY ProLogix Solutions extension numbers into their non-local dial plans. For example, one extension number block on System A is 54400–54499 (see Table 2–23, page 2- 92). If the last four digits were programmed into the non-local dial plan extension ranges of Systems O and N, the range would be 4405–4495, matching extension numbers on System N. Therefore, this range would be denied on System N and ambiguous on System O. Instead, users at all three systems dial System A extensions in the same way, using five digits. Systems O and N simply route calls on the first four digits dialed, and the fifth digit is sent to the DEFINITY ECS or DEFINITY ProLogix Solutions system for local dial-plan routing. In this case, dialed digits should be administered to 5.
NOTE:
DID (Direct Inward Dialing) and PRI dial plan routing supports routing to
1-to 4-digit numbers. If incoming calls must reach 5-digit DEFINITY ECS or DEFINITY ProLogix Solutions system extension numbers, digit manipulation can be performed via UDP routing. However, it is best if DID lines are connected directly to the DEFINITY ECS or DEFINITY ProLogix Solutions system.
