Comtest Networks 2870 Multi-Dwelling POTS User Manual

Model 2870 Multi-Dwelling POTS Splitter Installation Guide

Copyright © 2009,

Comtest Networks Inc.

This guide provides the basic information required to install the Comtest Model 2870 Multi-Dwelling POTS
Splitter Shelf in a Multi-Dwelling location.

Installation

The 2870 requires 10¾” x 8” of mounting space. Four wood screws (not supplied) are typically required for
mounting on a wall. Comtest recommends the use of #8 wood screws, the length of which is determined by the
thickness of the wood surface on which the 2870 is installed.

PIN 1

POTS Connector

LINE Connector

Model 2870 standard configuration with punch downs

Cabling Overview

The 2870 cabling configurations will vary depending on the installation. However, the physical interface to the
Front Panel connectors are standard 50-pin RJ-21 type receptacle connectors. Each 2870 provides 25 POTS
splitters terminated on each 50-pin connector.

Connector Pin Outs

As view from the rear of the shelf:

• Signals to and from the outside plant enter the
2870 splitter shelf using the RJ-21 connector
designated ‘LINE Connector’.

• Cables to and from the subscribe premises
enter the 2870 splitter shelf via the PHONE RJ­21 connector, designated ‘PHONE Connector’

If the optional Punch Down Blocks are provided, the
PHONE connections are extended from the PHONE
Connector to the ‘PHONE 25 Pair to Subscribers’
punch down block. Also, the LINE/ADSL connections
are extended from the LINE Connector to both the
‘ADSL 25 Pair to Subscribers’ and ‘LINE 25 Pair from
Central Office’ punch down blocks. To connect this
arrangement up correctly, proceed as follows:

• Terminate 25-pair outside plant on the ‘LINE 25
Pair from Central Office punch down strip.

• Terminate 25-pair wiring POTS service to
subscribers on ‘PHONE 25 Pair to Subscribers’
punch down strip.

• Terminate 25-pair wiring to ADSL service to
subscribers on ‘ADSL 25 Pair to Subscribers’
punch down strip.

Warranty

Filter LINE Connector POTS Connector

No. Tip Ring Tip Ring

1 26 1 26 1
2 27 2 27 2
3 28 3 28 3
4 29 4 29 4
5 30 5 30 5
6 31 6 31 6
7 32 7 32 7
8 33 8 33 8

9 34 9 34 9
10 35 10 35 10
11 36 11 36 11
12 37 12 37 12
13 38 13 38 13
14 39 14 39 14
15 40 15 40 15
16 41 16 41 16
17 42 17 42 17
18 43 18 43 18
19 44 19 44 19
20 45 20 45 20
21 46 21 46 21
22 47 22 47 22
23 48 23 48 23
24 49 24 49 24
25 50 25 50 25

Comtest warrants all equipment manufactured by it and bearing its nameplate to be free from defects in
workmanship and materials, during normal use and service, for a period of thre e (3) years from the date of
shipment. In the event that a defect in any such equipment arises within the warranty period it shall be the
responsibility of the customer to return the equipment by prepaid transportation to a Comtest service centre
prior to the expiration of the warranty period for the purpose of allowing Comtest to inspect and repair the
equipment. If inspection by Comtest discloses a defect in workmanship or material it shall, at its option, repair
or replace the equipment without cost to the customer, and thereafter return it to the customer by the least
expensive mode of transportation the cost of which shall be prepaid by Comtest. In no event shall this warranty
apply to equipment which has been modified without the written authorization of Comtest, or which has been
subject to abuse, neglect, accident or improper application. If inspection by Comtest discloses that the repairs
that must be made on the equipment are not covered by this warranty, the regular repair charges shall apply to
any repairs made to the equipment.

This warranty constitutes the only warranty applicable to the equipment sold by Comtest and no other warranty
or condition, statutory or otherwise, expressed or implied shall be imposed upon Comtest nor shall any
representation made by any person including a representation by a representative or agent of Comte st be
effective to extend the warranty coverage provided herein. In no event (including, but not limited to the
negligence of Comtest, its agents or employees) shall Comtest be liable for special or consequential damages
or damages arising from the loss of use of the equipment and on the expiration of the warranty period all liability
of Comtest whatsoever in connection with the equipment shall terminate.

Canada Help

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