ADTRAN T200 IDSL Manual do Utilizador descarregar pdf (Página 2)

2 Issue 1, May 2004 61292023L5-5A

Revision History

This is the initial issue of this practice. Future changes

to this documentation will be explained in this

subsection.

Description

The ADTRAN Total Reach OCU-R is a span-powered

termination unit designed to deliver data rates up to 64

kbps and provide testing functionality at the customer

premises. Used in combination with the Total Reach

DDS-DP unit, the Total Reach OCU-R converts the 2-

wire Total Reach signal to the traditional 4-wire DDS

signal for presentation to the customer. The Total Reach

OCU-R is an auto-rate adaptive digital network

interface located at the customer premises point of

demarcation. The OCU-R will deliver a standard four-

wire signal up to 18 kft beyond the OCU-R. Both

customer and network interfaces are equipped with

outside plant lightning protection. The customer

interface is capable of receiving signals attenuated to

–45 dB at the NyQuist frequency of four-wire AMI

DDS. In addition to terminating the 2-wire extended

range signal, the Total Reach OCU-R functions as a

regenerative loopback device supporting Telco-

generated testing. The Total Reach OCU-R unit is

available in T200 mechanics, and may be optioned for

0 dB or -10 dB output toward the customer. Figure 2

illustrates the Total Reach DDS circuit diagram.

NOTE

The Total Reach OCU-R unit must be used

with an appropriate Total Reach DDS-DP unit.

Figure 2. Total Reach DDS Circuit Diagram

Features

The basic features of the System Name Total Reach

OCU-R, include the following:

• Two-wire deployment

• Repeaterless operation

• Bridged tap tolerant

• Span-powered

• DB-9 craft interface access for provisioning,

testing, and performance monitoring

• Frame IQ provides physical layer and Frame Relay

• ADS-6 provides in-band PM access

• Protected Loopback prevents false latching

loopback at 64 kbps

• Auto-rate adaptation on subrates, 19.2 and 56 kbps

rates, including secondary channel, and 64 kbps

clear channel capability

• LED indicators for SYNC, CRC, Service Rate,

NTWK Loopback, CUST Loopback, and Alternate

Provisioning

• T200 mechanics

• Signal-level indication during synchronization

• Extended range on customer interface up to 18 kft

or 45 dB

• Sealing current of 12 mA on four wire customer

interface

Part Numbers

Tab le 1 identifies the different ADTRAN Total Reach

products.

T-Carrier

Channel Bank

2-Wire Loop

4-Wire Customer

Interface

DSU/CSU

OCU-R

DDS

T/R Pair

Customer Premises

Table 1. Total Reach Part Numbers

Part Number Description

1291004L1 D4 Total Reach OCU DDB

1291004L2 D4 Total Reach DDS DDB

1292006L1 D4 Total Reach DDS

1292006L3 D4 Total Reach DDS DP w/Craft Port

1292006L4 D4 Total Reach DDS DP w/Craft Port

1433105L1 Series 5 Total Reach DDS DP

1433105L2 Series 5 Total Reach DDS DP

1433105L3 Series 5 Total Reach DDS DP

1433105L5 Series 5 Total Reach DDS DP

1410105L2 DE-4 Total Reach DDS DP

1430105L2 D448 Total Reach DDS DP

1 2 3 4 5 6 7 ... 21 22

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