Nortel Networks Remote Gateway 50 manual

Page 182 of 258 Dialing Plan configuration

After configuring the zone-based digit manipulation (step 1 on page 175 and step 2 on page 177) and specialized route (step 3 on page 178), the route must be associated with the ESN Special Number. The main office ESN Special Number configuration is based on new digits inserted by zone-based digit manipulation. The digits are processed based on the Access Code, AC1 or AC2, that was dialed.

Note 1: For off-net calls the following should be considered:

•If all calls that have undergone Zone-based digit manipulation are to be routed by the NRS, one SPN must be provisioned for each call type to route calls to the NRS based on the ZDP.

•If some calls are to be routed by the NRS, and others by the main office Call Server, multiple SPNs should be provisioned to route calls based on the ZDP value and one or more dialed digits. Each SPN can then use a different RLI if required.

For example, assume ZDP = 101. It is possible to provision multiple SPNs (1011, 1012, 1013, 1014, 1015, 1016, 1017, 1018, 1019, and 1010) to route calls based on the ZDP value plus the first dialed digit. However, it may not be necessary to provision all SPN combinations. For example, if calls dialed with a first digit of “3” after the Access Code are invalid, then SPN “1013” does not need to be provisioned.

•Be careful when choosing how many dialed digits to include in the SPN. If one of the dialed digits is included in the SPN (that is, ZDP + one dialed digit), a maximum of ten SPNs must be configured for each branch office. Similarly if two dialed digits are included in the SPN (ZDP + two dialed digits), a maximum of 100 SPNs must be configured for each branch office. For each additional dialed digit included in the SPN, the maximum number of SPNs that must be provisioned for each branch office is increased by a factor of ten.

Note 2: If a single Access Code that undergoes Zone-based digit manipulation is used for both on-net and off-net calls, then separate DMIs and SPNs must be provisioned to correctly route these calls. The SPN must correctly identify the routing to be used, and its CLTP field must set the call type correctly. A DMI, associated with this SPN, is used to make sure the number stays in the Private/Special Number domain.

553-3001-207 Standard 2.00 January 2006