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ShoreGear

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1

 Lift the ShoreGear voice switch to the 

desired height and attach it to the frame 
with four standard rack screws. 

2

  

Insert the screws in both the upper and 
lower positions on the rack-mount ears.

Verify there is at least two inches of open space 
around all vent holes.

Introduction

About the SG-120 and SG-24A

The SG-120 and SG-24A Voice Switches connect enterprise telephone extensions 
through an internal IP network, or to any central of

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 ce (CO) analog trunk line. 

The switch provides connectivity through:

•  Two RJ-45 local area network (LAN) connectors

•  One RJ-21X port for connecting the switch to a telephone company punch-down 

block or patch panel.

•  One RJ-11 port for connection to the extension side of the Power Fail Transfer Unit 

(Extension 9). Power Fail Transfer is supported only on the SG-120.

•  One DB-9, RS-232C maintenance port (19200 bps, 8 bits, no parity, 1 stop bit, 
  no handshake) for serial communications

•  One audio input port (3.5 mm stereo) for connecting a music-on-hold source

•  One audio output port (3.5 mm stereo) for connecting the switch to a corporate 

paging system or night bell

The SG-120 or SG-24A Voice Switch package contains:

•  ShoreGear 120 or ShoreGear 24A Voice Switch

•  Power cord

•  Stick-on feet 

(for surface installation)

•  Cable retainer for an RJ-21 Telco cable
 

(a metal bracket with a Velcro strap)

Installation

Mounting the ShoreGear Voice Switch on a Flat Surface

Before mounting the switch on a 

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 at surface, attach the provided rubber feet to 

the bottom corners of the device. You can stack up to three switches in a surface 
installation.

1

 Den SwitchGear voice switch zur 

gewünschten Höhe heben und mit vier 
standard Gestellschrauben befestigen.

2

 Die Schrauben sind in die obere und untere 

Position der Öse einzufügen.

Es ist sicherzustellen daß mindestens 5cm 
Abstand zu allen Belüftunbgsöffnungen 
vorhanden ist.

What You Need for Installation 

To install the switch, you need the following equipment:
•  AC surge protector for the power connection
•  RJ-45 cable for connecting the switch to the local area network
•  Music-on-hold source with a standard mini-headphone Y-adapter (optional)
•  Permanent earthing connector for grounding the device
•  RJ-21 to RJ-11 patch panel for connecting telephones and trunk lines
•  #1 Phillips screwdriver

Choosing a Location

To ensure optimum operating conditions for the ShoreGear voice switch, make sure 
that its operating environment is adequately ventilated, free of gas or airborne particles, 
and isolated from electrical noise.

Connections

Installation des ShoreGear Voice Switch (

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 ache 

Ober

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 äche)

Zur Installation auf einer 

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 achen Ober

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 äche sind zuerst die mitgelieferten Gummifüße 

an den Ecken des Gerätes zu befestigen. (Bis zu drei Geräte können in dieser Weise 
aufeinander gestellt werden.)

Powering on the ShoreGear Voice Switch

After connecting the switch to the network, power on the device by connecting it to an 
AC power source.

1

  Plug an AC surge protector (not provided) into a grounded AC power source.

2

  Plug one end of the provided power cord into the receptacle on the back of the 

switch, then plug the other end into the AC surge protector. 

The power LED 

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 ashes momentarily, and remains lit. 

•  If the LED is not lit, verify the power cord is plugged into the switch and the power 

source. 

•  If the LED continues 

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 ashing, there is an internal error. Unplug the switch to power 

it off, then power it back on. Refer to the “Con

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 guring Switches” chapter in the 

ShoreTel Administration Guide

 for information on 

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 ash patterns, or contact the 

ShoreTel Support Services at http://www.shoretel.com.

The LAN ports auto-sense the network transport rate. When the network connection is 
established, the network LED indicates a transport rate of 10 Mbps or 100 Mbps, and 
whether the switch is receiving and transmitting data.

Optional Connections

After connecting the voice switch to the LAN, you can make optional connections, 
including input from a music-on-hold source or output to your internal paging system.

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LAN 1

connector

LAN 2

connector

Analog port LEDs

RS-232C 

maintenance 

port

Audio output port

(night bell)

Audio input port

(music-on-hold)

RJ-21X

Telco port

RJ-11

extension 9

Power

LED

Default

switch

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Connecting the ShoreGear Voice Switch to the Network

Once the SG-120 or SG-24A Voice Switch is secured to a rack or surface-mounted, you 
can connect it to the data network. 

  Use an RJ-45 Ethernet cable to connect one or both of the 

LAN ports to the network subnet.

While both ports can detect and respond to link status, the switch 
uses only one LAN port at a time.

Connecting Trunk and Telephone Lines

Use an RJ-21 Telco cable and the provided cable retainer to connect the voice switch to 
the telephone company’s punch-down block or patch panel. 

1

    

Use a #1 Phillips screwdriver to remove the two screws on 

either side of the RJ-21X port, then place the retainer on the 
port and re-attach the screws.

2

   Plug the Telco cable into the port, then pull the Velcro strap 

tightly around the cable connector and fasten it.

3

  

Connect the other end of the Telco cable to the punch-down 
block or patch panel.

CAUTION: 

To reduce risk of 

fi

 re, always use #26 AWG or larger 

telecommunications line cable.
For detailed information on switch port and trunk con

fi

 guration, see 

the sections “Con

fi

 guring Switches” and “Con

fi

 guring Trunks” in the 

ShoreTel Administration Guide.

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ShoreGear

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Installing the ShoreGear Voice Switch (Rack Mount)

The ShoreGear voice switch is equipped with pre-installed rack-mount ears for easy 
installation into a standard 19-inch rack. 

1

  Connect a music-on-hold source (CD player or other audio 

source) to the audio input port.

2

  Connect your site’s paging system to the audio output port.

Only use a 3.5 mm stereo jack (not a mono jack) in this port.

Anbringen des Erdanschluß

Um UL Anforderungen zu erfüllen muß ein permanenter Erdanschluß zwischen dem 
ShoreGear voice switch und dem Erdleiter des Versorgungsstromkreis hergestellt sein.  

1

 Den Erdleiter (min. #16 AWG oder größer) an der Schraube befestigen welche sich 

an der Hinterseite und rechts des Leistungsschildes be

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 ndet. 

2. Das andere Ende des Erdleiters ist mit dem Erdleiter des Versorgungsstromkreis zu 

verbinden. 

ACHTUNG: 

Immer zuerst die permanente Erdverbindung herstellen bevor das Gerät an 

LAN Segmente oder Telekommunikations- Leitungen angeschlossen wird.

Installation des ShoreGear Switch (Gestell)

Der ShoreGear switch ist mit vier installierten Ösen für die einfache Installation in 
einem 19 Zoll Gestell ausgerüstet. 

Attaching an Earthing Connector

To meet UL requirements for proper grounding, you must connect a permanent 
earthing protector between the ShoreGear voice switch and the wiring system ground. 

1

  Connect a ground wire (#16 AWG wire or larger) to the screw on the back of the 

unit and to the right of the product label. 

2

  Connect the other end of the ground wire to the wiring system ground. 

CAUTION:

 Always connect the permanent earthing connector before attempting to connect 

the switch to a LAN segment and telecommunication lines.

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