ESI IVX 20, Руководство по установке

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Hardware overview/installation IVX 20
B.10
CO line connection
Local loop
IVX’s advanced CO line circuitry provides for open-loop detection and built-in Caller ID interface.
Loop start lines are connected via the last six pairs on the 66 block (Lines 5 and 6 require the ex-
pansion card).
Note: Observe correct order of connection to preserve proper rotary hunting of the CO Lines.
Station connection
The first eight pairs on the amphenol are digital station ports connected to the main board. With
the expansion card installed, the next four pairs also are digital station ports, and then the final
two pairs are analog ports.
All stations are connected using a single pair. Each port position is pre-numbered and fixed as
indicated in the 66 Block Wiring Diagram that follows.
Note: The station runs can be up to 1,000 ft.
Digital stations
The digital station wiring is not polarity-sensitive. Only one phone can be connected per
digital port.
Important: The IVX 20 Digital Feature Phone uses a single pair from the port card to the
phone extension. Because the phone’s design uses other pairs to control
peripheral devices (e. g., the 64-Key Expansion Console),
do not connect any
additional pairs to the Digital Feature Phone from the KSU; this can cause erratic
operation and may disable the extension.
In addition, the data pair for the Digital Feature Phone should
not have any cable
splits (single or double), cable bridges of any length, or high-resistance or faulty
cable splices.
Similarly, a standard
four -wire multijack (“harmonica jack”) connected to the
amphenol will cause the Digital Feature Phone’s LCD characters to “bleed.” To
provide proper operation, you must rewire the multijack for a
single
pair.
Analog ports
The analog ports do not require that tip-and-ring polarity be observed. The analog ports can be
used for 2500-type sets or for devices such as fax machines, modems, etc., that can be connected
via a normal tip-and-ring pair.
Important: For the analog ports on a 684 port card, the signal is limited by a variety of fac-
tors, including phone line characteristics, to a maximum data transfer rate of
9,600 bps. As a result, we highly recommend that these ports be used only with
devices (e. g., credit card readers) for which a maximum data transfer rate of
9,600 bps is satisfactory.