
Introduction and Specifications
20 025-9035AA
Operator Local Phone Configuration
Digital T1 Interface
Parameter Description
Connections 2-wire tip, ring
Supervision Reverse battery, answer beeps or computer modem
Battery Source To phone 48 +/- 3 V DC; Current limited 40 +/- 10 mA
Loop Closure Detect threshold 6 mA +/- 3 mA
Pulse/DTMF
Acceptance
(see DID Selector Level/PABX Trunk Configuration on page 19)
Parameter Description
System Requirements 2000 Series Paging Terminal must have high performance Pentium
CPU card
Capacity Up to 24 channels of T1 support per each T1 Interface
(partial T1
trunk support can be achieved using fewer trunk cards)
A 2000 Series Paging can support two T1 Interface units for a
total of 48 channels
Compatible CSU units Interface to PSTN requires the use of a CSU, approved units are:
Import T1 CSU 1544
AT&T ESF CSU 551E-L1, A
(Please contact Zetron for information on any additional CSU units
that may have been added to the list.)
Power AC Input 85 to 264 VAC at 47 to 440 Hz, 130 W max.
DC (Optional) 36 to 76 VDC
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