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XEISDNP

Single Module ISDN Analog Telephone (POTS) Equipment Interface

Xecom 

XEISDNP

Single Module ISDN Analog Telephone

(POTS) Equipment Interface

Description

The XEISDNP is a multichip module designed

to interconnect analog telephone equipment such

as a handset, a Group 3 Fax machine, or an

analog modem to an ISDN Terminal Adapter. The

device provides all the functions needed to

support conventional analog subscriber equip-

ment including voice/fax data CODEC, DTMF

tone detector, RING signal generator and tele-

phone line power feed. It provides a simple,

compact solution for designers who wish to inte-

grate an ISDN digital interface into their designs

but also protect their user’s investment in their

existing POTS (Plain Old Telephone Service)

equipment.

The XEISDNP is designed to interface with the

XECOM XEISDNU Single Module ISDN Terminal

Adapter.

Features

• Small size: 2.75" x 1.38" x 0.42"

• Adds POTS function to XECOM XEISDNU

• Supports standard analog telephones, Group 3

FAX machines, and analog modems

• Provides all Central Office functions to analog

telephone equipment

• Uses GCI (IOM-2) or IDL standard communi-

cation bus to exchange voice/fax/data between

its on board CODEC and ISDN Terminal

Adapter

• Pin configurable to Mu-law or A-law PCM

coding

• Programmable for B1 or B2 channel of the

ISDN Basic Rate interface

• Uses standard data bus to access DTMF

codes from the ISDN TA

• Built-in 150V DC inverter to support RING

signal generation

• Built in power supply provides the telephone

handset with 30 to 50 mA current

Route CTRL

GCI or IDL Bus

CODEC

for

Voice/FAX

Data

ROUTE

SWITCH

Voice/FAX/Modem signal path (Analog)

To telephone set

or FAX machine

Three state

DTMF output

DTMF ready

XEISDNP

DTMF

Decoder

DC Power supply

RING Generator

+

10uF/250V

Off Hook

Power CTRL

RING CTRL

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