Product Specification Sheet APS205

Rev. 07/2013

1381 Line Isolation Unit (AstraPage series)

This Specsheet is for a product which is discontinued. Please contact us for alternative products.
Architects' And Engineers' Specifications
The Line Isolation Unit shall be Alpha Communications® / Stento model #1381 or approved equivalent. The unit shall be made of ABS plastic finished in Grey epoxy with dimensions 2.00" H x 4.00" W x 4.00" D. The unit shall have automatic answering with pickup on the 2nd or 3rd ring, controlled by encoder. The disconnect time shall be 6 to 10 seconds upon completion of dialing to the AstraPage system. The unit shall come with 2 screws for wall mounting and require 10-12 VDC. The #1381 operates on the AstraPage Radio Paging System.

Contractor shall observe all local and national electrical and building codes.

1381 Line Isolation Unit
The #1381 is a standard telephone system coupler (Line Isolation Unit) that provides unattended automatic answering and interface for tone dialing into a radio paging (pocket pager) system. It provides answering circuitry, isolation and controls to allow anyone with a DTMF telephone to dial directly to a Stento pocket radio receiver and leave a preset alphanumeric message. It handles one call at a time, but each call requires only a few seconds to transmit a message. The unit will automatically disconnect. The #1381 operates on the AstraPage radio paging system.
  • Automatic Answering
  • Simple Installation
  • Fast Operation
  • Designed to FCC Requirements

ABS plastic finished in Grey epoxy
2.00" H x 4.00" W x 4.00" D (51mm x 102mm x 102mm)
Ring Signal:
60-150 V AC, 16-60 Hz
2nd or 3rd ring, controlled by encoder
Requires 12VDC @ 60 ma
Positive Screw Terminals
Input Signal:
-12 dbm @ 600 ohm balanced
Wall mount with 2 screws provided
Disconnection Time: 
6-10 seconds (disconnects upon the completion of dialing to AstraPage System)

Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.