Nortel Networks SRG 50 NN43001-307 User Manual

Page 47

Zone-based digit manipulation

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.

Calling Line ID composition

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
Special Number. The call-type before digit manipulation is determined as
follows:

•

If the call-type before digit manipulation is SPN (Special Number), it
is converted to a value corresponding to the CLTP parameter in the
Special Number Translations data block, as shown in

Table 7 "Mapping

between from CLTP parameter in SPN block to call-type before digit
manipulation" (page 47)

Table 7
Mapping between from CLTP parameter in SPN block to call-type before
digit manipulation

CLTP parameter

Call-type before digit manipulation

LOCL

Local PSTN

NATL

National PSTN

INTL

International PSTN

•

If the call-type before digit manipulation is not SPN (Special Number), it
is not changed.

CLID verification

Use the CLIDVER prompt in LD 20 to verify that the CLID has been properly
composed and configured. This command simulates a call, without actually
making the call, and generates a report of the properties of the call.

Nortel Communication Server 1000

Main Office Configuration Guide for SRG 50

NN43001-307

02.02

Standard

Release 5.0

3 December 2007