Instruction manual

FCC Compliance for DID Answer Supervision Page 1481 of 3156
Features and Services
DID calls forwarded to private networks
Answer supervision is not always returned on TIE trunks because some TIE
trunks leased from public carriers are connected to COs that do not support
answer supervision.
Currently, the Meridian 1 provides the SUPN prompt (LD 14) to specify the
availability of answer supervision on certain types of trunks, including TIE,
CAM, Common Control Switching Arrangement (CCSA), and CAA (CCSA
Automatic Number Identification [ANI]). If SUPN is YES, and it is an
outgoing trunk, Meridian 1 does not return answer supervision to the
incoming DID trunk unless answer supervision is received from that outgoing
trunk. If the user specifies NO, the Meridian 1 returns pseudo-answer
supervision upon EOD or ODT timeout. Such implementation causes short
billing and overcharge problems.
To solve this problem, a treatment similar to the one implemented on CO
trunks is used on the trunks in this category. The Meridian 1 enforces
SUPN = NO without changing the SUPN value.
For incoming DID calls routed to private networks, SUPN is enforced to NO
to ensure the return of answer supervision on the outgoing TIE, CO, FEX,
WATS, CAM, CAA, and CCSA trunks. If answer supervision is not returned
when the end of dial timeout occurs, the Meridian 1 disregards the original
value of SUPN set by the user and forces the return of answer supervision.
When the call comes from a DID trunk, the following outgoing trunks are
affected: TIE, CO, FEX, WATS, CAM, CAA, and CCSA.
Feature interactions
Extended DID/DOD Software Support - Europe
If FCC Compliance for DID Answer Supervision (FC68) package 223 is
configured on XDOD units, it may lead to incorrect call status. Therefore,
equipping this package is not recommended.
Extended Flexible Central Office Trunk Software Support
If FCC Compliance for DID Answer Supervision (FC68) package 223 is
configured on XFCOT units, it may lead to incorrect call status. Therefore,
equipping the FCC package is not recommended.