User manual

Introduction
System Overview
1-2 July 2004 Wide Bank 28 DS3 - Release 2.4
System Overview
Carrier Access’ Wide Bank 28 DS3 Multiplexer provides a standards-based M1-3 multiplexing
function. This product converts a framed Digital Signal Level 3 (DS3) network connection to 28 Digital
Signal Level 1 (DS1) connections to T1 facilities, or 21 connections to E1 facilities.
The Wide Bank’s modular design provides up to seven active quad DS1 (QDSX) cards or seven active
three-channel E1 cards, and one spare circuit card (DS1 or E1), connecting from 4 to 28 DS1 (3 to 21
E1) circuits, as needed. The spare circuit card provides software-controlled redundancy of low-speed
interfaces on a 1 to 7 basis. The DS3 Controller Card provides all common electronic functions of power
conversion, processing and management, and a single DS3 interface. An optional spare DS3 Controller
card in the Wide Bank provides redundancy and protection for both electronic common equipment and
a second, redundant, DS3 network connection.
The Wide Bank does not re-frame or re-clock the connected low-speed inputs. It allows T1 or E1
framing to be provided independently by the connected communications equipment at both the near-
end and the far-end of the DS3 line. Each T1 or E1 is also independently clocked within the M1-3
formatted DS3 composite. Because of independent clocking and framing capabilities for each of the T1
or E1 connections, the Wide Bank can provide asynchronous T1 or E1 to DS3 multiplexing functions.
The Wide Bank is designed for compact size (one rack unit) and convenient mounting either in standard
19-inch and 23-inch racks or on a wall. It is designed to provide total circuit redundancy and easy
maintenance. Integrated self-tests and line tests provide advanced fault isolation. SNMP, command line
interfaces, and TL1 connection allow remote management. The Wide Bank is also designed for quick
and easy installation. An optional AC to –48VDC power converter and battery backup unit provide
protected power. Cabling to the Wide Bank uses connectors to save installation labor.
Fan Faceplate Option (FFO)