AT&T MERLIN LEGEND Installation & Maintenance Manual page 41

System Description
Table 1-1 Continued
Line/
Module
Trunk Type
008 OPT N/A
*
The system software recognizes the OPT module as a 012 module; thus, the
overall station capacity is reduced by four stations for every OPT module.
1-10 Control Unit
Station Type Specifications
On-premises Capacity: 8 T/R stations* on
or off- 2-way voice transmission path
premises with support for telephones with
single-line message-waiting LEDs; 2 TTRs
telephone Notice to telephone company:
meets FCC Class C
Ringing current: 105-Vrms,
30-Hz sinusoidal ringing super-
imposed on -48 VDC; a ring
generator must be installed in
the power supply module of
each carrier that has a 008 OPT
module.
REN: ≥ 1.0 per port
Disconnect signal: 900 ms
(T/R short for answering
machines, G3 fax, etc.)
Switchhook flash detection:
300—1200 ms
Loop resistance: serves 2-wire
loops to 1300 ohms, including
stations