Datasheet XEISDNB Datasheet (XECOM)

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XECOM (1) XEISDNB

XEISDNB

2/99

Description

The XEISDNB integrated ISDN Terminal Adapter offers an easy to use, high performance, component-level solution for equipment designs needing access to ISDN service. The module can directly connect to a host processor through its on-board serial TTL level interface and link to the ISDN subscriber line U interface with its integrated NT1.

The device is designed for the ISDN Basic Rate Interface (BRI) which consists of two 64 k bps bearer (B) channels for data or voice and one delta (D) channel for signaling. The module can provide a full 128k bps synchronous data channel by combining the two bearer channels.

Alternatively, one 64k bps channel can be dedicated to data while the other can be made available for analog phone/fax/modem calls with the addition of the XEISDNP Analog Telephone (POTS) Equipment Interface. Together these provide the user with a complete ISDN terminal adapter function in two compact modules.

Built-in ISDN control firmware supports all the functions necessary for setup and configuration of the terminal adapter and the ISDN line. Configuration can be accomplished via an extended AT command set, a menu-driven setup utility, or factory default/user stored configuration profiles.

The built-in ISDN Monitor firmware has fifteen commands supporting customer program development and download. The 256Kx16 Flash memory is designed to support custom control program downloading. By changing a configuration pin the XEISDNB can boot-up from

the ISDN-Monitor or a user developed program as well as the built-in ISDN control program.

Features

· Small size: 2.75" x 1.38" x 0.42"

· Motorola MC68302 Integrated Multi-protocol Processor with RISC controller. 128K x 16 SRAM, 256K x 16 Flash Memory and 8K x 8 EEPROM included

· ISDN line U interface (integrated NT1) with 2B1Q encoding (ANSI T1.601) for North American usage

· V.120 rate adaptation, point to point protocol (PPP), Multi-link PPP, Asynchronous Inverse Multiplexing (AIM), and synchronous BONDING protocol

· ISDN control program allows connection with AT&T 5ESS, Northern Telecom DMS 100 and National ISDN-1 central office switches

· EIA-232E/V.24 ready serial interface at TTL levels (RS-232-TTL)

· 300 to 115,200 bps asynchronous, 1200 to 64,000 bps synchronous data rate; up to 128k bps with BONDING protocol

· Menu-driven and stored configurations

· Control outputs to interface with XEISDNP Analog Telephone (POTS) Equipment Interface module

· On-board ISDN Monitor supports user program downloading and system debugging

· Jumper configurable memory addressing allows easy change from Development to Application mode (using built-in ISDN control program or user developed program)

ISDN Terminal Adapter with NT1 and Channel Bonding

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XECOM (2) XEISDNB

XEIS D N B

DMA

(1)

68000

Core

T imers

(3)

DMA

(6)

512 KB

Flash

memory

1152 Byte

Dual port

RAM

SM Cs (2)

and

SCP

SCCs

(3)

256 KB

SRAM

8 KB

EEPROM

Interfac e

I/O p orts

RISC

C ontr oller

POTS Data RS-232 -T TL POTS Control

ISDN Local Loop

IDL B U S

SCC

(1)

DMA

(2)

XEISDNB Block Diagram

Mechanical Specifications

INCHES METRIC (MM)

MIN MAX MIN MAX

A 2.740 2.760 69.60 70.10 B 1.370 1.390 34.80 35.31 C 0.420 0.430 10.67 10.92 D 1.190 1.210 30.23 30.73 E 2.290 2.310 58.17 58.67 F 0.125 0.200 3.18 5.08 G 0.080 0.100 2.03 2.54 H 0.215 0.235 5.46 5.97 I 0.090 0.110 2.29 2.79

J 0.020 0.025 0.51 0.64

Denotes Pin 1

HI H

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XECOM (3) XEISDNB

TD TTL

TOUT2

RD TTL

TTL

LK TTL

R TTL

RI TTL

TBT

LK TTL

DTMF RDY

TRL

D D7

Pin Configuration

Pin Descriptions

Pin Name Pin # Direction Description

TIN1 1 ISDN U transformer primary A TIN2 2 ISDN U transformer primary B No Pin 3 N/A No pin TOUT1 4 ISDN U transformer secondary A TOUT2 5 ISDN U transformer secondary B Reserved 6 N/A No user connection allowed Reserved 7 N/A No user connection allowed Reserved 8 N/A No user connection allowed GND 9 Ground Power & signal ground CFG/SDO 10 Input/Output Configuration setup. See Modes of Operation. When re-pro-

gramming the In-System Programmable (ISP) CPLD, this pin is used for the cascade connections and should not be pulled low or

high. TD_TTL 11 Input RS-232C, Transmitted Data, TTL Level RD_TTL 12 Output RS-232C, Received Data, TTL Level

Reserved

FSX

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XECOM (4) XEISDNB

RTS_TTL 13 Input RS-232C, Request to Send, TTL Level CTS_TTL 14 Output RS-232C, Clear to Send, TTL Level DSR_TTL 15 Output RS-232C, Data Communications Equipment (DCE) Ready, TTL

Level CD_TTL 16 Output RS-232C, Received Line Signal Detect, TTL Level TCLK_TTL 17 Output RS-232C, Transmit Clock, TTL Level Reserved 18 N/A No User Connection Allowed DTR_TTL 19 Input RS-232C, Data Terminal Ready, TTL Level RI_TTL 20 Output RS-232C, Ring Indicator, TTL Level MCLK_TTL 21 Input RS-232C, Master Clock, Transmitter Signal Timing (DTE Source)

RST_BT 22 Input Optional on-board processor Reset button No Pin 23 N/A No Pin GND 24 Ground Power & signal ground Reserved 25 N/A No User Connection Allowed D7 26 Input Data bus line 7 for CODEC Data D6 27 Input Data bus line 6 for CODEC Data D5 28 Input Data bus line 5 for CODEC Data D4 29 Input Data bus line 4 for CODEC Data PDI 30 Output CODEC Power Down Control RT_CTRL 31 Output CODEC Voice Signal Route Control PWR_CTRL 32 Output POTS Phone Set Power Control DC_EN 33 Output Enable DC Source for RING generation RING_EN 34 Output RING Signal Enable for POTS module DTMF_RDY/SDI 35 Input DTMF Signal Ready from POTS module. When used with the In

System Programmable CPLD, It becomes the SDI OH/MODE 36 Input Off Hook Signal from POTS module. When used with In System

Programmable CPLD it becomes the Mode Control SCLK 37 Input SCLK for In System Programmable CPLD ISP_EN 38 Input In System Programmable CPLD Enable Signal FSR 39 Output CODEC Frame Sync. Receive Reserved 40 N/A No User Connection Allowed Reserved 41 N/A No User Connection Allowed Reserved 42 N/A No User Connection Allowed Reserved 43 N/A No User Connection Allowed FSX 44 Output Frame Synchronization DIN 45 Input Data In DOUT 46 Output Data Out DCL 47 Output Data Clock

+5V 48 Power +5 Volt power supply

Electrical Specifications

ABSOLUTE MAXIMUM RATINGS Parameter Maximum V alue

Supply Voltage VCC (+5V) +6.5 Volts DC input voltage (TTL inputs) -0.6 Volts to +6.5 Volts Storage Temperature Range -25C to +85C

Lead Temperature (soldering, 2 sec/wave) +260C Operating T emperature Range 0 to 70C

* Exceeding these values may result in permanent damage to the device

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XECOM (5) XEISDNB

POWER SUPPLY CHARACTERISTICS (Ta = +70C)

Symbol Parameter Min Typ Max Unit Notes

Vcc Supply Voltage 4.75 5.0 5.25 Volts Icc Vcc Supply Current 200 mA

I/O Characteristics

ISDN U - INTERFACE Parameter Specification

Line interface ANSI T1.601, 2B1Q encoding, U reference point (with recommended components) ISDN Switch Compatibility National ISDN-1, Northern Telecom DMS-100,Lucent 5ESS

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

RS-232-TTL Interface

Parameter Symbol Min Typ Max Unit Notes Input High Voltage V sub IH 2.0 5.0 Volts

Input Low Voltage V sub IL -0.3 0.8 Volts Input Leakage Current I sub IL 20 MA Output High Voltage V sub OH 3.875 Volts Vcc = 5 Volts Output Low Voltage Vsub OL 0.5 Volts Vcc = 5 Volts

Recommended Components List

Component Qty Value Supplier Part Number Phone Number

Transformer 1 Midcom 671-7834 605-886-4385

Schott 671 46720 615-889-8800

Pulse Engineering PE 68628 619-674-8100 Resistor 2 6 Ohm, ¼ W Capacitor 1 3300 pF Connector 1 8 pin (pins 4,5 active) RJ45

Design Considerations

ISDN Capability

Integrated Services Digital Network (ISDN) is a powerful, flexible, high-speed service now available from most local 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 function without dedicating an entire board and a significant firmware investment to this purpose.

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XECOM (6) XEISDNB

Terminal Adapter Function

The XEISDNB integrated ISDN Terminal Adapter Module is designed to provide a compact, simple design solution for adding ISDN service access to industrial, medical, computer, business, and consumer products which need to communicate with remote computers or networks at high data rates. Only four passive components must be added to implement the hardware interface, signaling and protocols for the North American ISDN standard interface to the local telephone company.

When used alone the XEISDNB module presents a high speed digital data channel to the local host equipment through an RS-232E-ready (TTL) serial interface. This channel can be configured by the designer or user for high speed synchronous or asynchronous applications. Async Inverse Multiplexing (AIM) or Multi-link PPP provides up to 115.2k bps asynchronous throughput. BONDING protocol provides a 128k synchronous channel.

When combined with the XEISDNP Analog Telephone Equipment Interface, the XEISDNB can provide either B channel ( on the same physical ISDN line) for simultaneous use by an independent analog phone, fax, or modem designed for “Plain Old Telephone Service” (POTS). Thus the user can place voice calls over the same ISDN line as data calls, and his investment in existing analog phone equipment is preserved.

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XECOM (7) XEISDNB

Typical Application Circuit

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XECOM (8) XEISDNB

Modes of Operation

Application Mode

The normal mode of operation of the XEISDNB is Application Mode. This would typically be the only mode visible to the equipment end user. When the CFG/SDO (pin 10) is pulled high, the XEISDNB module is in the Application mode. The ISDN configuration and control program supplied by Xecom or the equipment designer’s specially developed control program will boot-up upon power-on. In this mode the control program can occupy up to 240K x 16 of the 256K x 16 Flash memory.

Development Mode (ISDN Monitor)

XEISDNB also provides a development tool for designers who wish to write their own firmware control code. When the CFG/SDO (pin 10) is pulled low, the module will boot-up from the on board ISDN Monitor program. The xecom ISDN Monitor has fifteen debugging commands including program downloading, memory contents display and Flash memory operation. The complete command set is listed in the Configuration Guide.

After the designer program has been developed and tested using the ISDN Monitor utility it can be downloaded into non-volatile Flash memory. The module is then reconfigured to the Application Mode, and the program is ready to run.

Configuration and Setup

An ISDN telephone line presents a significantly more powerful and complex interface to the user than a standard analog (POTS) line. Unlike an analog line, the digital ISDN line requires special setup, demultiplexing, and signal processing to separate its two 64k bps data channels (B channels) and its 16k bps signaling channel (D channel) at the user interface. In order to establish a connection to an ISDN line, certain parameters must be exchanged between the telephone company switch and the local data communication equipment to initialize the call. It is assumed here that the user has access to an already installed ISDN line and the configuration parameters (Dial Numbers, Service Profile Identifiers, Switch Type, Switch Version, Long Distance Carrier) provided by the phone company for that line. Further information on these parameters is contained in the Configuration Guide.

In addition to the remote switch configuration, the local terminal adapter (TA), like an analog modem, must be set up properly to operate. There are several parameters which must be set compatibly at the TA and the switch to specify the exact services to be provided over the line. These parameters will vary with the application. The XEISDNB implements these functions based on setup information provided by the user. There are three methods for configuration of the link.

AT Command Configuration

The most basic configuration technique is through AT commands. The user interface is similar to that of an analog modem with an extended command set. The user communicates this information to the module through the RS232E serial port. A PC running standard VT100 compatible serial communications software is typically used for this purpose. The AT command set of the XEISDNB is designed to enable configuration and testing for both the remote switch and the terminal adapter.

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XECOM (9) XEISDNB

Like an analog modem, the XEISDNB operates in two modes: data mode and command mode. In data mode the device sends all data received at its data ports down the ISDN link. In command mode the TA interprets these inputs as configuration and setup commands and processes them locally. Commands are communicated to the TA via its RS-232 serial interface from the local host processor. The TA enters command mode upon power-on, any time the Escape command “+++” is received, or when a call is terminated.

The commands for TA configuration are modeled on the standard set used for analog modems with extensions for the new ISDN functions. Commands for remote switch configuration and the unique ISDN functions required of the terminal adapter have been added. The XEISDNB firmware contains an AT Command Help listing which can be displayed by typing “AT&H” while in command mode. The module will respond with a listing of AT commands with brief definitions of each. The complete command set listing appears in the Configuration Guide along with examples of configuration profiles for typical applications.

Menu Configuration

The second configuration method uses a group of Setup Menus built into the XEISDNB firmware. These menus are accessed by entering the AT command “@SETUP” while the module is in Command Mode. Keyboard commands from a PC in VT100 terminal emulation mode allow the user to move through the complete set of configuration choices, enter variable data, and store the results. Operation of the Setup Menus are explained in the Configuration Guide.

Stored Configurations

A complete set of configuration parameters must be in place each time the XEISDNB places a call. However the current parameters are held in volatile memory and are lost when the host equipment power is interrupted. Also, once a working configuration has been established for a particular ISDN line, terminal equipment set, and service type there is no need to change it for each call. To speed up and/or automate the call setup process stored configurations are provided in the XEISDNB.

Two types of stored configurations are provided: factory defaults and user defined configurations. Factory defaults are stored in Flash memory while user defined sets are stored in EEPROM. The factory default configuration sets provided represent setups for common applications. Descriptions of these are contained in the Configuration Guide. There are provisions for two user defined configuration sets. In addition the settings associated with switch parameters are stored and accessed separately to help prevent accidental changes. Extended AT commands are provided to store and load these configuration sets upon power up or separately. These commands are detailed in the Configuration Guide.

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XECOM (10) XEISDNB

Terms of Sale

Devices sold by XECOM are covered by the warranty provisions appearing in its Terms of Sale only. XECOM makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or regarding the freedom of the described devices from patent infringement. XECOM makes no warranty of merchantability or fitness for any purposes. XECOM reserves the right to discontinue production and change specifications and prices at any time and without notice. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing and authorization by XECOM for such application.

Xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xecom product. No other circuits, patents, or licenses are implied.

Life Support Policy

Xecom's products are not authorized for use as Critical Components in Life Support Devices or Systems.

Life Support Devices or Systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions provided in the labeling, can be reasonably expected to result in significant injury to the user.

A Critical Component is any component of a life support device or system whose failure to perform can be reasonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness.

Copyright, Xecom © 1999 While Xecom, Inc. has made every effort to ensure that the information presented here is accurate, Xecom will not be liable for any damages arising from errors or omission of fact. Xecom reserves the right to modify specifications and/or prices without notice. Product mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies.

Xecom

Incorporated 374 Turquoise Street, Milpitas, CA 95035 Ph:408-945 -6640 Fax:408 -942-1346 Email: [email protected]