Nortel 1000 Configuration Manual

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Nortel 1000 Configuration Manual Manual pdf 46 page image

46 Dialing Plan configurationIt is possible to divide a system into several zones. It is also possible todivide a customer within a system into different zones. It is more common toassign one zone to one system and one customer.Zone-based digit manipulationFor SRG users in Normal Mode, it may be desirable to provide routing thatis different from that provided to main office users. For example, it may bedesirable to route certain calls directly to the SRG PSTN trunk, rather thanreceive the same routing as non-SRG users in the main office.To achieve this, the Zone Access Code Behavior (ZACB) and Zone DigitPrefix (ZDP) properties of the branch office zone are used to add digits to thedigits dialed by the SRG user. The resulting digit string is then used to routethe call. The net effect of this is that an SRG user’s and a main office user’scall can be routed differently, even though the dialed digits were the same.For example, if 1 87654321 is dialed, where 1 is the Access Code, then:• for a main office user, the call is routed based on the dialed digits.• for an SRG user, the digits undergo zone-based digit manipulation (suchas inserting 101), and the call is routed based on the new manipulateddigit string (in this example 1 101 87654321).By performing this zone-based digit manipulation, calls from main officeusers and SRG users undergo different routing. Some applications are:• routing all SRG user calls to the SRG PSTN trunk• routing SRG user local calls to the SRG PSTN trunk• routing all SRG user calls to the main office PSTN trunk• routing SRG user long-distance calls to the main office PSTN trunkSpecial considerations apply in the case where a single Access Codeis used for both on-net and off-net calls, especially when UDP is used.Routing of on-net and off-net calls is normally different. The Call ServerESN Special Number provisioning and Gatekeeper Numbering Plan Entryprovisioning should be used to provide this different routing.In the case where a single Access Code is not shared, that is, whereone Access Code is exclusively used for UDP on-net dialing, standardprocedures should be used. See Dialing Plans Reference (NN43001-283).For a given branch office, there may be more than one zone defined at themain office. Therefore, different SRG users may receive different routingtreatments.Nortel Communication Server 1000Main Office Configuration Guide for SRG 50NN43001-307 02.02 StandardRelease 5.0 3 December 2007Copyright © 2005-2007, Nortel Networks.