XECOM XE0020C, XE0020 Datasheet

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XE0020 and XE0020C

8/97

Telephone Line Interface with Active Line Monitoring

Description

The XE0020 and XE0020C are complete compact telephone interface modules. As with all Xecom DAAs the XE0020 and XE0020C include Ring Detection, Switch-Hook, and Loop Current Holding Circuits. In addition both the XE0020 and XE0020C include two line monitors to insure unobtrusive customer premises operation. The XE0020C also passes the Caller ID signal through to the system host.

Xecom designed the XE0020 and XE0020C for unobtrusive operation in residential applications. Two integral line monitors prevent interference with the residents calls.

Connect Detect verifies line availability before the equipment seizes the line. This will prevent the equipment from interrupting a residents call.

Handset Interrupt signals the system host to drop the call in progress when the resident picksup an extension phone. This feature permits the resident to interrupt the call in case of emergency.

Features

*Small Size: 2.0" by 0.5" by 0.4" thick;

*Supports data transfer at 33,600 bps;

*FCC Part 68 Compliant;

*Ring Detection;

*Continuous Connect Detect Monitor;

*Handset Interrupt Monitor

*Single +5 Volt Power Supply;

*Hookswitch Control

*Caller ID Signal Path (XE0020C)

Models

XE0020: includes ring detect , hookswitch, Handset Interrupt, Connect Detect, telephone line transformer, loop current holding circuit;

XE0020C: XE0020 features plus Caller ID signal pass through;

Caller ID permits the host to identify incoming calls and answer only those from designated call centers.

Together these features give residents priority use of the telephone line without shutting out the equipment.

 

Block Diagram

 

 

Caller ID

 

 

(optional)

 

T1

 

TIP

Line

Loop

 

Current

 

T2 Transformer

Holding

RING

 

Circuit

 

OH

Hook-

 

 

 

 

Switch

 

RI

Ring

Detect

HInt

Line

CD Voltage

Monitor

XECOM

XE0020

Mechanical Specifications

 

Inches

Millimeters

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dim

Min

Max

Min

Max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

-

0.400

-

10.16

 

 

 

 

 

C

 

 

 

 

 

 

B

 

 

B

-

0.520

-

13.21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

C

-

2.020

-

51.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

0.040

0.060

1.02

1.52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J

E

0.090

0.110

2.29

2.79

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

F

E

H

 

 

 

 

I

 

 

F

0.790

0.810

20.07

20.57

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

G

0.490

0.510

12.45

12.95

 

 

 

 

 

 

 

 

 

E

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

0.390

0.410

9.91

10.41

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

0.040

0.060

1.02

1.52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J

0.125

0.200

3.18

5.08

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Size: 0.025" by 0.025"

Recommended hole size: 0.056"

All pins tin-plated.

XE0020/XE0020C Pin Configuration & Descriptions

bottom view

 

 

1

2

3

4

5

6

7

8

9

10

 

 

 

 

o

o

o

o

o

o

o

o

o

o

 

 

 

Ring Tip

OH

T1 Gnd Vcc T2

/RI

HInt /CD

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

Name

Description

 

 

 

 

 

 

 

 

 

 

1

Ring

Ring is one of two signals which form the telephone network connection (RJ11 Pin 4). The

 

 

 

XE0020 is not sensitive to the polarity of the battery voltage on the telephone line. Ring has

 

 

 

1500 volts isolation from the rest of the circuitry which must be preserved throughout the

 

 

 

system.

 

 

 

 

 

 

 

 

 

 

2

Tip

Tip provides the second connection to the telephone network (RJ11 Pin 3). Tip has 1500

 

 

 

volts isolation from the rest of the circuitry. This isolation must be preserved throughout the

 

 

 

system.

 

 

 

 

 

 

 

 

 

 

3

OH

Hook-switch relay control an active high input.

A high on OH closes the internal relay and

 

 

 

connects the equipment to the telephone line.

 

 

 

 

 

 

4

T1

T1 connects directly to the secondary side of the XE0020's internal telephone line

 

 

 

transformer.

 

 

 

 

 

 

 

 

 

 

5

GND

This signal is used as common reference for all of the control signals in the XE0020. Signals

 

 

 

on T1 and T2 are not referenced to ground.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XECOM

(2)

XE0020

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