Installation guide

Connectors Site Requirements and Preparation
12
ShoreTel 14.2 Planning and Installation Guide 251
Pinout information for ShoreTel Voice Switches is provided in the quick install guide for each voice
switch.
Digital Trunk and Trunk Monitor Cabling
ShoreTel voice switches that support digital trunks have an RJ-48C connector as the telco interface to
the T1/E1 trunk from the telephone service provider.
These voice switches provide an internal Channel Service Unit (CSU).
ShoreTel voice switches that support T1 and E1 trunks have an additional RJ-48C connector that is
wired to the telco interface for the purpose of troubleshooting the T1 or E1 interface with specialized
test equipment. This connector is normally not used.
Audio Input (Music on Hold) Cabling
Various ShoreTel voice switches have a 3.5 mm mini-stereo input connector that provide music or
some other recording to callers when they are on hold. The input port supports low-level line audio
from a preamplifier or mini-CD player, at 47 k nominal impedance. The audio input cable can be up to
10 feet long. Refer to the ShoreTel quick install guide for your voice switch to determine whether your
switch provides the 3.5 mm mini-stereo input connector.
The audio input port on the ShoreTel voice switches is a mono connection. If you connect a stereo
input, the stereo signal is converted to a mono signal.
To minimize bandwidth, music on hold is not streamed across the wide area network, so you will need
one music source per site.
The music and music source are not included with the ShoreTel system.
Audio Output (Paging and Night Bell) Cabling
Various ShoreTel voice switches have a 3.5 mm mini-stereo audio output connector for overhead
paging and night bell on a per site basis. The audio output port provides low-level line audio with a
sufficient input level for a typical amplifier. The paging port output is about one volt peak to peak,
similar to the line output of a CD player, and can drive inputs that are 600 ohms or higher. Refer to the
ShoreTel quick install guide for your voice switch to determine whether your switch provides the 3.5
mm mini-stereo input connector.
The audio output is mono signal. If you use a stereo jack, the signal is available on one channel, but
the other channel will be silent.
This is a single-zone paging system. If more zones are required, see the application note on
ShoreTel’s online knowledge base.
WARNING!
In accordance with United States copyright laws, a license may be required from the American
Society of Composers, Authors, and Publishers, or a similar organization, if radio or TV
broadcasts are played for music on hold. As an alternative, an ASCAP-approved CD or tape can
be used. ShoreTel, Inc. disclaims any liability out of failure to obtain such a license.