1.1
Detailing The Specifications
Electrical Specifications
Power requirements:
Supplied by the common equipment
Ringing voltage:
55 VAC Nominal @ 20 Hz
(45 VAC minimum)
Power rated to maximum
REN = 2.0
Battery feed voltage:
24 VDC nominal
Loop current limits between ATI-D and IST interface:
20 ma min. at 620 ohms
70 ma max. at 0 ohms
DC loop limits from ATI-D to industry standard
interface per port:
620 ohms maximum including interfaced
telephony device (Approximately 4000 feet with
#26 AWG twisted-pair cable and 300 ohm
device load.)
(Approximately 500 feet if two IST devices are
connected in parallel on same tip and ring pair.)
Cable insulation resistance:
30,000 ohms minimum
Cable requirement ATI-D to common equipment:
2-pair twisted cable; 25 feet maximum length.
(Both common equipment station ports must
always be connected to the ATI-D for every
installation.)
Cable terminations:
623-type, 4-conductor minijacks
Dialing:
Industry-standard DTMF or
Dial pulse (rotary) with nominal
make/break ratio of 40/60 @ 10 PPS
IMI89–208
Installing And Programming For ATI–D–1PT
2 – Installing The ATI–D–1PT