XEISDNB Просмотр технического описания (PDF) - Xecom

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XEISDNB

ISDN Terminal Adapter with NT1 and Channel Bonding

Xecom 

POWER SUPPLY CHARACTERISTICS (Ta = +70C)

Symbol Parameter

Min

Typ

Max

Unit

Notes

Vcc

Supply Voltage

Icc

Vcc Supply Current

4.75

5.0

200

5.25

Volts

mA

I/O Characteristics

ISDN U - INTERFACE

Parameter

Line interface

(with recommended components)

ISDN Switch Compatibility

B Channel Protocols

RS-232-TTL Interface

Specification

ANSI T1.601, 2B1Q encoding, U reference point

National ISDN-1, Northern Telecom DMS-100,Lucent 5ESS

V.120, PPP, Multi-link PPP, Async inverse multiplexing, BONDING

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Input High Voltage

Input Low Voltage

Input Leakage Current

Output High Voltage

Output Low Voltage

V sub IH

V sub IL

I sub IL

V sub OH

Vsub OL

2.0

-0.3

3.875

5.0

Volts

0.8

Volts

20

MA

Volts

Vcc = 5 Volts

0.5

Volts

Vcc = 5 Volts

Recommended Components List

Component

Transformer

Resistor

Capacitor

Connector

Qty Value

Supplier

1

Midcom

Schott

Pulse Engineering

2 6 Ohm, ¼ W

1 3300 pF

1 8 pin (pins 4,5 active)

Part Number

671-7834

671 46720

PE 68628

Phone Number

605-886-4385

615-889-8800

619-674-8100

RJ45

Design Considerations

ISDN Capability

Integrated Services Digital Network (ISDN) is a powerful, flexible, high-speed service now available from most lo-

cal phone service providers in North America, Asia, and Europe. It provides two 64k bps digital bearer channels (B

channels) and one 16k bps signaling channel (D channel) over a single pair of copper wires. Typically the installed

base of subscriber loop wiring is adequate for this service, making ISDN the most cost effective means of delivering

high speed digital dial-up service to homes and businesses.

Because ISDN is a digital service, connection of computer equipment does not require a modem like a conventional

analog line. However a terminal adapter is required to translate the physical signal levels and the protocols of the

Data Terminal Equipment into those of the ISDN lines and switches. External ISDN Terminal Adapters have been

available for some time. The XEISDNB provides a simple means for designers to implement an internal TA func-

tion without dedicating an entire board and a significant firmware investment to this purpose.

XECOM

(5)

XEISDNB

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