Support Telephone Number; Prerequisites For Installation - NEC i-Series Gateway Quick Installation Manual

Support Telephone Number

Call your NEC America, Inc. authorized dealer if you need assistance when installing, programming, or
using your system.

Prerequisites for Installation

The following items are required before installing the i-Series Gateway.
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Appropriate network terminating device must be installed, configured, and functioning at both the
corporate facility and the branch office and both must support an RS-232, V.35 or V.530 synchronous,
asynchronous or Voice over IP interface.
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A 50-pin cable with an RJ-21 female connector.
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Appropriate network terminating device must be installed and functioning at both the corporate facility
and the branch office.
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The data connection between the corporate facility and the branch office MUST be operational and
configured properly.
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The system has been designed to operate from 100-240 VAC, 50-60Hz. Power should not be applied
to the i-Series Gateway unit until specified in the installation procedures.
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The Gateway's power supply and cabling should be installed away from high power/high RF noise
devices such as computers, fans, fluorescent ballast, power supplies, etc.
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Use good wiring practices. Do not run wires over fluorescent lights, computers, air conditioners, etc. as
this can introduce noise to the modems.
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The distance from the PBX to the i-Series Gateway should not exceed 500 feet.
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Obtain the following information from your customer:
MODE: (V.35, RS-232, RS-530)_________________
NUMBER OF DS ∅ s allocated ____________
56K or 64K_______________
number of DS ∅ s X 64 or 56K(above) = _________ SYNC RATE ÷ number of stations = _______
If the result is at least 40 KBPS use ADPCM32 voice compression
If the result is less than 40 KBPS but at least 32 KBPS use ADPCM24 voice compression
If the result is less than 32 KBPS but at least 16 KBPS use G.729A voice compression
If the result is less than 16 KBPS, there is not enough bandwidth for all phones to be active
simultaneously.
Note: This is a general guideline for calculating bandwidth requirements. For more information, see
your System Administrator's Guide.
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If using an asynchronous connection, an ISDN Terminal Adapter (TAs) from the list below must be
installed and operational at BOTH the corporate facility and at the Branch Office location. This list is
complete as of the release date of this document.
i-Series Gateway 
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