MERLIN LEGEND Communications System Release 6.1 | Issue 1 |
Network Reference 555-661-150 | August 1998 |
2 Call-Handling Scenarios | |
Networking Guidelines | Page 2-6 |
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Non-Local DEFINITY ECS or DEFINITY | |
ProLogix Solutions Systems | 2 |
DEFINITY ECS and DEFINITY ProLogix Solutions communications systems can support either 4- or 5-digit dial plans. However, 5-digit extension ranges cannot be programmed into a MERLIN LEGEND Communications System non-local dial plan. With possible extension numbering conflicts in mind, handle 5-digit extension numbers by using one or both of the two methods explained below.
■Program the first four digits of the extension number ranges into the non- local dial plan, for example 1234–1236 for remote extensions 12340–12369. Because ranges are programmed and not necessarily individual extensions, this may not present problems. However, this method does not work when you need to stipulate ranges of fewer than ten numbers. Aside from this consideration, this method is usually the better of the two techniques. Users dial 5-digit extension numbers to reach non-local users at DEFINITY ECS or DEFINITY ProLogix Solutions systems, and they dial the same extension numbers as the DEFINITY ECS or DEFINITY ProLogix Solutions users do within their own system. A MERLIN LEGEND Communications System consults the non-local dial plan to route, based on the first four digits, but sends the fifth digit to the DEFINITY ECS or DEFINITY ProLogix Solutions system for handling. “Scenario 5: Large System Hub” on page 88 provides an example.
For Release 6.0 systems earlier than Version 11, when this method is used, a MERLIN LEGEND Communications System user must dial the fifth digit of a non-local DEFINITY ECS or DEFINITY ProLogix Solutions extension number within two seconds of dialing the fourth digit.
For Release 6.0, Version 11 and later systems, programming the number of dialed digits as 5 makes this restriction unnecessary and speeds call setup time.
■Program the last four digits of the extension number ranges into the non- local dial plan, for example 2340–2369 for extensions 12340–12369. Then, when you assign UDP routes to the patterns, program the number of dialled digits as 4 (Release 6.0 Version 11 and later system only), and use the Other Digits system programming setting to prepend the first digit, which in this example is a 1. If it is necessary to route PSTN Direct Inward Dialing (DID) or PRI dial-plan routed calls through a MERLIN LEGEND Communications System to a DEFINITY ECS or ProLogix Solutions system with 5-digit numbering, you must use this method.
NOTE:
It is best to connect DID trunks directly to DEFINITY ECS or
DEFINITY ProLogix Solutions systems instead of MERLIN LEGEND
Communications System for local routing.
In larger private networks, the second method may cause more numbering conflicts than the first method. You must consider the second digit(s) of DEFINITY ECS or DEFINITY ProLogix Solutions extension numbers to avoid confusion and ambiguity. Extensions 12345 and 2345, for example, are ambiguous when the 1
