Standard 2.00 January - Nortel Remote Gateway 50 Configuration Manual

Page 172 of 258
Calling Line ID composition
553-3001-207 Standard 2.00
Dialing Plan configuration
For a given branch office, there may be more than one zone defined at the
main office. Therefore, different SRG users may receive different routing
treatments.
The combination of zone-based digit manipulation and CS 1000 routing
capabilities can be used to achieve many other routing outcomes for SRG user
calls.
Digital manipulation is commonly used for digit insertion and deletion. It is
also used for call type conversion before out-pulsing the digits to the Virtual
Trunk.
The IP Special Number (ISPN) parameter in the ESN data block ensures the
Calling Line ID (CLID) is formed correctly when a call-type is converted
from its original type (such as International, National, or SPN) to CDP/UDP/
SPN format. Conversion to CDP/UDP/SPN format ensures that the call-type
stays in the Private/Special Number domain.
The ISPN parameter is configured in LD 86. By default, it is set to NO.
If ISPN is NO, the CLID is formed based on the CTYP parameter of the DMI
data block, and INST digits are inserted.
If ISPN is YES, the CLID is formed based on the call-type before digit
manipulation. INST digits are inserted, and the CLID is considered an IP
January 2006