Installation manual

ESI-50L Hardware Installation Manual External connections

G.5

CO line connection

Local loop

An ESI Communication Server’s advanced CO line circuitry provides for open loop detection and the

system’s built-in Caller ID interface. Loop start lines are connected via the last four pairs on each 66 block on

the 482 card.

Note: Observe correct order of connection to preserve proper rotary hunting of the CO lines.

Station connection

Each 482 port card (built-in or external) supports up to eight digital stations and up to two analog devices.

All stations are connected using a single pair. Each port position is pre-numbered and fixed as indicated in the

66 block wiring diagram shown for each port card type.

Note: The station runs can be up to 1,000 ft.

Digital stations

Digital stations for the ESI Communications Server include:

• ESI Digital Feature Phones

• ESI Digital Cordless Handsets

• ESI Presence Management RFID Readers

The digital station wiring is not polarity-sensitive. Only one phone can be connected per digital port.

The station line voltage is 33 VDC.

For proper operation, the combined length of

feed cables, backbone cabling, cross-connect,

and station cable must not exceed 1000 feet

(304 meters) for digital stations. Station line cord

length should not exceed 12 feet (note that this is

the length of the line cord ESI provides with

each Digital Feature Phone).

Each digital station can have no more than two

cross-connects or splices in the cable distribution.

Cable construction, termination blocks, and

modular jacks must meet at minimum Category 3

cabling requirements. Additional splices or

terminations will further reduce the maximum

cable length at which the digital station will operate reliably.

Because of potential interference caused by electrical noise, ESI strongly

recommends against distribution of digital stations with analog stations or other circuits in the same cable

binder or station run.

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.

Each analog port will support only a single analog device. The ESI-50L supports a maximum of eight analog

devices. All analog ports provide Type I Caller ID information (Caller ID with call waiting is not supported).

For information on installing ESI Presence Management, see its Installation Manual (ESI # 0450-0792).