Lucent Technologies 555-661-150 manual Routing for Outside Calls

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
2 Call-Handling Scenarios
Network Configuration Scenarios	Page 2-67

Routing for Outside Calls

This topic examines routing for hypothetical outside calls, to show how the system managers in Scenario 3 maximize cost benefits from the private network. As you study the example call routes in Table 2–17, page 2-68, review the general setup as described earlier in this section.

Note the following facts about routing for outside calls in this scenario:

■Some DID calls that come into System K are actually destined for System L. In a private network such as this one where one system has blocks of DID numbers, digit manipulation can be used to route DID calls from one system to another. In this example, System K has purchased a block of DID numbers from a service provider.

■At Systems K, L, and M, users make and receive 2B data calls. If an outside 2B data call travels over PRI or BRI facilities and/or tandem PRI facilities only, it can take place up to 128 kbps. However, if it is routed over a PSTN T1 Switched 56 facility (such as the one connected to System M), the 2B data call can travel at a rate no higher than 112 kbps.

■A PRI dial-plan routed call can be sent across the private network to a telephone extension. If ANI information is available and the call traverses PRI facilities only, it can be displayed at the recipient’s extension. DID calls do not provide calling party, but they do provide calling party name or number information.

■The call information signals for outside calls sent from System K or System M to the centralized automated attendant indicate an outside call. This allows a unique greeting and/or menu to be played.