3657–00/04/14 2-Wire Foreign Exchange Subscriber (2W FXS) and 3657–02 2W FXS with Gain Transfer (2W FXS/GT) Channel Units
■Document Purpose
▲This document provides information on the Issue 8 versions of the Charles Industries 3657–00/04 2–Wire Foreign Exchange Subscriber (2W FXS), the Issue 2 version of the 3657–14 2W FXS, and the Issue 8 version of the 3657–02 2W FXS with Gain Transfer (2W FXS/GT) Channel Units
■Equipment Function
▲These channel units are used in the Charles Industries 360/363 D4 Digital Carrier Terminal to provide an interface to special service circuits.
■Equipment Features
▲The 3657–00/02/04/14 channel units include the following features:
◆Complies with AT&T Publication 43801 Specifications
◆Complies with UL Standard 1459 Second Edition
◆900–(3657–00/02)/600–(3657–04/14) ohms plus 2.15uF compromise network and line build-out capacitors (3657–00/04/14)
◆Provision for external precision balance network
◆Built-in jack (on 3657–02 only) to mount an optional 3690–00/10 Compromise Network Subassembly or an optional 3690–01/11, –02/12, or –03/13 Precision Balance Network Subassembly
◆Prescription attenuation for the transmit and receive levels
◆Front-panel-accessible bantam breaking- jacks for accessing the 2W port
◆Built-in jacks (on 3657–02 only) to mount optional 3691–00 Nonloaded Cable Equalizer and/or 3691–01 Loaded Cable Equalizer Subassemblies for pre- and/or post-equalization
◆DIP switch-selective ground-start or loop-start operation
◆Compatible with 100-millisecond ringing intervals
◆Ring tripping during the ringing or silent intervals
◆Switch-selective talk-battery input of either –48Vdc or –72Vdc (3657–02 only) (requires external –72Vdc power)
◆End-to-end signaling compatibility with D4, D3, D2, or D1D Foreign Exchange Office (FXO) channel units (3657–00/04/14 only)
◆Front-panel-accessible NORM/BUSY switch (3657–00/04/14 only)
◆Front-panel BUSY LED indicator
◆DIP switch-selective operation for carrier failure (immediate or delayed) trunk processing
◆DIP switch-selective GTD–3 EAX compatibility (3657–00/04/14 only)
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2-Wire Foreign Exchange Subscriber Channel Units 、 channel units |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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March 2001 |
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208 KB |
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