AT&T MERLIN LEGEND Release 3.0 Installation Manual page 510

Customer Support Information
If there are no directly terminated trunks, or if the only
directly terminated facilities are personal lines, report the
number AS5USA-65646-PF-E.
The REN (Ringer Equivalency Number) for all three systems
is 1.5A.
— For tie line connection, the facility interface code (FIC) is TL31M
and the service order code (SOC) is 9.0F.
— For connection to off-premises stations, the FIC is OL13C and
the SOC is 9.0F.
— For equipment to be connected to 1.544-Mbps digital service,
the FIC is 04DU9-B for
extended framing format, and the SOC is 6. OP.
— For equipment to be connected to DID facilities, the FlC is
02RV2-T and the SOC is 9.0F.
— The quantities and USOC numbers of the jacks required.
— For each jack, the sequence in which lines are to be connected,
the line types, the FIC, and the REN by position when
applicable.
Disconnection.
if and when this equipment is permanently disconnected from the
line(s).
REN.
The REN is used to determine the number of devices that
may be connected to the telephone line. Excessive RENs on the
line may result in the devices not ringing in response to an
incoming call. In most, but not all, areas the sum of the RENs
should not exceed five (5.0). To be certain of the number of
devices that may be connected to the line, as determined by the
total RENS, contact the telephone company to determine the
maximum REN for the calling area.
A-4 Maintenance and Troubleshooting
framing format or 04DU9-C for
D4
You must also notify your local telephone company