The DSC Platforms supports NAs with numbers ranging from 1 to 99. The mapping of the DSC NAs to the C20 NAs is as follows:

DSC NAC20 NA
1-98

Maps to 1-98

Note: Values above 31 are NOT supported on the C20. For more information, refer to the C20 User Guide.

99Maps to 0

The following messages from a SP2000 to a CallAgent perform the NA field conversion (99 to 0) on the SG before sending the message to C20:

  • NA Provisioning Message (NA field)
  • Routeset Provisioning Message (NA field)
  • M3UA Payload and SNM message (NA field)
  • SCCP C20 Header (NA Node field)

The following messages from a CallAgent to a SP2000 perform the NA field conversion (0 to 99) on the SG before forwarding the message to MTP3.

  • NA Audit Message (NA field)
  • Routeset Audit Message (NA field)