Nortel Remote Gateway 50 Configuration Manual page 182

Page 182 of 258
553-3001-207 Standard 2.00
Dialing Plan configuration
After configuring the zone-based digit manipulation (step 1 on
step 2 on page 177) and specialized route (step 3 on
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.
January 2006
page 175 and
page 178), the route