XE924M Base Access Point Multiple Remote Machines Description Xec
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XE924M
XE924M Base Access Point Multiple Remote Machines
Description Xecom combines proven embedded modem technology transceiver XE924M, Base Access Point. Base Access Point simple scheme connect remote systems single dial-up telephone line. Each remote system communicates with Base Access Point using Xecom's XE900M Smart Transceiver. XE924M eliminates hardware redundancy, therefore reduces both initial investment operating costs. Xecom's Base Access Network significantly reduces hardware costs locations with multiple systems. example, credit card verification normally requires dedicated modem telephone line each sales terminal. Each time terminal added another modem another telephone line also need added. Base Access Point connects terminals through shared modem telephone line. only hardware requirement addition XE900M Smart Transceiver terminal equipment. This scheme eliminates installation requirements wired network. Whether system equipped with Smart Transceiver network build facility, wireless link eliminates need install cables configure server. virtue commonality with millions cordless telephones XE924M also offers most cost effective wireless link available. XE924M reduces hardware costs multiple system environments. Systems which require dedicated modem telephone line each unit connected through shared modem telephone line.
System XE900M Equipped
System XE900M Equipped
XE924M Base Access Point
System XE900M Equipped
Dial-up Telephone Line
900MHz Base Access Network Features Small Size: 2.75" 1.38: 0.500" Provides dial-up network access machines equipped with Xecom's XE900M Smart Transceiver. Count-off feature allows polling nodes less than seconds Telephone Modem Data Transfer 300, 1200, 2400 Telephone Modem Control Configuration industry standard Commands. Supports Wireless Carrier Frequency from Wireless Range; maximum Feet indoors Wireless Data Rate 9600 BPS, half-duplex Integrated communications controller regulates wireless communications protocols, error correction controls wireless link modem. circuit upgradeable firmware User Transferrable Part Registration Part Compliance
XECOM
XE924M
XE924M MECHANICAL SPECIFICATIONS
(Top View)
Inches 2.740 2.760 0.500 0.520 1.370 1.390 5.300 0.510 2.490 2.510 0.090 0.110 0.115 0.135 1.190 1.210 0.130 0.150
69.60 12.70 34.80 13.46 63.25 2.29 2.92 30.23 3.30
70.10 13.21 35.31 12.95 63.37 2.79 3.43 30.73 3.81
Description: Pins gold plated Dimensions .025 inches square, .minimum 0.120 inches long
XECOM
XE924M
XE924M BLOCK DIAGRAM
Antenna
Comm Controller
FLASH
Transceiver 2400 MODEM Ring
Communications Controller Serial
Modem Serial
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Operating Temperature Range
-25O +85O +70O
Units screened operation from +85C. extra charge will applied this screening.
XECOM
XE924M
XE924M CONFIGURATION
RGND RESERVED RGND RESERVED RGND RESERVED RGND RESERVED RGND RGND RESERVED RESERVED RESERVED DGND /RST_VPP RESERVED /DSR /MDM_DSR /MDM_RXD /MDM_TXD /MDM_RI RGND RESERVED RGND RESERVED RGND RESERVED RGND RESERVED RGND RGND RESERVED RESERVED RESERVED RGND /CTS /MDM_CTS /DCD /MDM_DCD /DTR /MDM_DTR /RTS /MRTS RING
XE924M
XE924M CONFIGURATION
SIGNAL RGND RESERVED PINS 40,41, DESCRIPTION RFGND provides common reference point high frequency signals. These pins reserved future use. connections should should made these pins. provides volt power communications controller DGND provides ground reference modem communications controller circuitry XE924M. RST_PV provides hardware reset line XE924M's communications controller. provides volt power transceiver
DGND /RST_VPP
XECOM
XE924M
XE924M CONFIGURATION
SIGNAL /DSR /MDSR /MRXD PINS DESCRIPTION /DSR Data Ready input communications controller. This normally tied /MDSR, /MDSR supplies Data Ready output from modem. /MDSR active output. This normally tied /DSR, serial data input communications controller. This normally tied /MRXD, /MRXD serial data output from XE924M's internal modem. Mark condition /MRXD active low. This normally tied RXD, serial data output from communications controller. normally tied /MTXD, /MTXD serial data input internal modem. Mark condition /MRXD active low. normally tied /MTXD, provides Ring Indication input communications controller. normally tied /MRI supplies Ring Indication output from embedded modem XE924M. /MRI active low. /MRI normally tied Ring signals provide connection from XE924M telephone line. Part Rules require 1500 volt isolation barrier between telephone line other circuits. This isolation must preserved throughout system. UL60950 requires minimum creepage clearances distances maintained between Ring other circuits. Clearance shortest distance between conductive circuits; creepage distance between conductive surfaces along surface. Ring signals provide connection from XE924M telephone line. Part Rules require 1500 volt isolation barrier between telephone line other circuits. This isolation must preserved throughout system. UL60950 requires minimum creepage clearances distances maintained between Ring traces other circuits. Clearance shortest distance between conductive circuits; creepage distance between conductive surfaces along surface. This intentionally removed improve isolation from local telephone line. provides Volt power integral modem.
/MTXD /MRI RING
XECOM
XE924M
XE924M CONFIGURATION
/MRTS /MRTS provides Request Send output from modem inside XE924M. This active output. /MRTS normally tied /RTS, /RTS supplies Request Send from communications controller. /RTS active output. /MDTR connects modems Data terminal Ready line. active input XE924M. /MDTR normally tied /DTR, /DTR provides Data Terminal Ready output from communications controller. /DTR normally tied /MDTR, This active output. /MDCD provides Data Carrier Detect output from modem inside XE924M. This active output. /MDCD normally tied /DCD, /DCD Data Carrier detect input communications controller. normally tied /MDCD, /MCTS provides Clear Send output from modem inside XE924M. This active output. /MCTS normally tied /CTS, /CTS Clear Send input XE924M communications controller. /CTS normally tied Programmable from embedded communications controller. used analog input (AN1), Digital output, digital input. from XE900M internal micro-controller.
/RTS /MDTR /DTR
/MDCD
/DCD /MCTS /CTS RA1/AN1
XECOM
XE924M
XE924M ELECTRICAL SPECIFICATIONS
Parameter
Output Power Wireless Receive Sensitivity Antenna Output reversal reversal Telephone Ring Sensitivity Ring Frequency Detected Telephone Loop Current Line Impedance Data Transmit level DTMF Transmit Level -0.3 VCC+0.3 15.3 -2.5 2.85
2.85
3.15
Units
Volts
Comments
Transceiver Power
Volts
Modem Power Modem Line Comm. Controller Power
3.15
Volts
Ohms
Load
VRMS Ohms Volts Volts Volts Volts over second interval Type Ringer Type Ringer
XECOM
XE924M
XE924M Typical Application Schematic
+3.3Vo
0.01
+3Vo
0.01
Reserved Reserved Reserved Reserved Reserved Reserved /RST_VPP Reserved /DSR /MDM_DSR /MDM_RXD /MDM_TXD /MDM_RI /MDM_RTS /RTS /MDM_DTR /DTR /MDM_DCD /DCD /MDM_CTS /CTS
XE924M
RGND RGND RGND RGND RGND RGND RGND RGND RGND RGND RGND RGND RGND DGND
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
RING
RJ11 JACK
Parts List XE924M Application Schematic Reference Designation FB1, Description Cap. 2600V PTC, TR600-150 Ferrite, ACB2012L-120
Antenna Xecom recommends Linx Technologies right angle antenna, ANT-916-CS-RCL-ND
XECOM
XE924M
XE924M COMMUNICATIONS CONTROLLER
Hardware: low-cost micro-controller performs duties communications controller XE924M. This microcontroller manages network data translation between transceiver embedded modem. embedded modem Xecom's XE2420, 2400 modem. This modem includes dedicated controller modem functions including commands. serial interface signals from XE2420 brought XE924M's pins diagnostic purposes. Network network controlled XE924M supports nodes eight remote systems. these systems communicate with XE924M using Xecom's XE900M Smart Transceiver. XE924M XE900M utilize half-duplex channel single carrier frequency, 916.48 MHz. XE924M communications controller manages this channel preventing collisions, correcting errors, reversing channels. Carrier Sense Multiple Access (CSMA) primary tool used prevent collisions between systems CSMA protocol each transceivers. XE900M XE924M units network listen communications activity 916.48 band before initiating session. Count-off Function count-off function permits Base Access Point quickly check status network nodes. When count-off command, AT#C: AT#C=, broadcast Base Access Point each node responds predetermined time slot. time slot determined address assigned node. node's response count-off command contains user-programmable byte data packet. This data packet programmed with AT#E: AT#E= command. count-off function also initiated from XE900M acting network hub. Data Packets XE924M places data incoming across modem link into packets. Likewise XE900M places data arriving through serial port into packets. These packets providing addressing error correction wireless communications link. communications controllers XE900M XE924M place data packets only wireless link. data extracted from packets before being sent modem XE900M serial port. Wireless Link Modem Link Translation Data wireless link travels packets 9600 BPS. communications controller strips data from packets before transmitting through modem. Because maximum data rate modem connection 2400 BPS, communications controller buffers data, sends modem 2400 BPS. While this happening incoming data from modem buffered held until wireless channel reversed. When wireless channel available transmit, data buffer into packets transmitted over transceiver 9600 BPS. communications controller also manages modem's connections. commands entered remote node placed packets passed across wireless link XE900M. XE924M Communications Controller removes command from packet, passes modem, waits modem response. modem response packet returned XE900M equipped node. routing incoming modem calls will also handled communications controller. After modem answers incoming call establishes connection, XE924M Communications Controller waits entry desired node address before directing call proper node.
XECOM
XE924M
XE924M EMBEDDED MODEM
modem embedded XE924M includes Part Registration. This registration applied user equipment without additional certification testing. Modem Control Industry standard Commands perform control configuration embedded modem. change modem configuration initiate call, remote node network sends desired commands across wireless link data. XE924M communications controller passes commands modem where they executed. modem responses returned across wireless link remote node. Command Line Format Command lines issued modem follow strict format. Each command begins with prefix ends with Carriage Return. XE924M communications controller sends commands embedded modem 2400 BPS. modem uses command prefix automatically determine parity incoming characters. Command Prefix Each command, except command, begins with prefix. either both upper case both lower case cannot different cases. prefix identifies speed parity commands sent modem host. Speed determined measuring width incoming bits. Parity determined comparing parity "T." Command Line Commands strung together single command line characters. modem executes commands command string sequence they appear. Spaces inserted into command line fill space modem's command buffer. Carriage Return terminates command line causes commands executed. Register allows user select character other than Carriage Return terminate command line. Re-Execute Last Command command reexecutes last command line. This only command which does require "AT" prefix. Omitted Parameters Most commands include parameter which determines function setting. When command parameter omitted from command string, assumed Result Codes modem normally issues result code after each action. Result codes provided full words, digit numeric codes, disabled. Each result code ends with Carriage Return when numeric result codes chosen. When full word result codes chosen, Line Feed Carriage Return precede follow each result code. Escape Sequence specific character repeated three times succession switches modem from data mode command mode. character used this sequence defined register default sequence "+++." Command must entered within period defined complete switch command mode.
XECOM
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XE924M
Embedded Modem Commands
asterisk indicates factory default Answer Command forces modem off-hook answer mode Select Communications Standard Selects CCITT standards Selects Bell standards* Selects V.23/Bell (see S37) Responses Send responses Responses
Interrogate Register Sr=n Register Value Result Codes Numeric Result Codes English Word Result Codes* Result Code Responses Responses Responses Responses 0-5, Responses Reset Factory Defaults Guard Timer None Guard Timer 1800 Guard Timer
Dial Command 0-9, A-D, Dialing Digits Pulse dial Tone dial Connect answering modem Wait dial tone Pause duration Wait silence Switch hook flash Return command state Dial Stored Number Command Echo Enabling command echo embedded modem will reduce efficiency wireless link recommended Switch Hook Control Switch hook relay opens Switch hook relay closes
Automatic Retrain Automatic Retrain Disabled Automatically retrain poor signal quality Data Buffering Data Buffered Direct Mode data buffering
Modem Identification Line Return Line with retrain* Initiate retrain while returning line.
XECOM
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XE924M
Embedded Modem Registers
Answer Ring: sets modem automatically answer ring. Setting disables automatic answer. Range: Units Rings Default Ring Count: read-only register showing number rings detected. ring detected within seconds, reset zero. Range: Units Rings Default Escape Character: determines ASCII escape character. Values 0-127 select valid ASCII escape characters; values from disable escape sequence. Range: Units ASCII Character Default Line Termination Character: determines ASCII character which will terminate commands modem responses. Range: Units ASCII Character Default (Carriage Return) Line Feed Character: sets ASCII character line feed character modem responses. Range: Units ASCII Character Default (Line Feed) Backspace Character: defines ASCII character used backspace edit command line. Range: Units ASCII Character Default (Back Space) Dial Tone Wait Time: determines long modem waits dial tone before dialing begins. Dial Tone Wait Time cannot less than seconds. Range: Units Seconds Default Wait Carrier after Dialing: determines long modem waits valid carrier signal after dialing completed. Range: Units Seconds Default Comma Pause Time: defines duration pause initiated comma dialing string. pause generally used when waiting second dial tone. Range: Units Seconds Default Carrier Detect Response Time: establishes length time remote modem's carrier must present recognized valid. Range: Units Seconds Default Carrier Disconnect Delay: selects long carrier must lost before modem disconnects. Note: smaller than value 255, modem will automatically disconnect loss carrier. Range: Units Seconds Default Tone Dialing Speed: sets duration spacing dialing tones. does affect pulse dialing rate. Range: Units Millisecond Default Escape Code Guard Timer: sets escape sequence guard timer. characters received before after escape sequence, within guard timer, modem aborts escape attempt remains data mode. Range: Units 0.02 Seconds Default
XECOM
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XE924M
Embedded Modem Registers continued
Inactivity Timer: determines long modem will remain line with data flowing. this register disables inactivity time out. Range: 0-255 Units Minutes Default Hook Flash Time: determines amount time modem will on-hook when hook switch flash called for. Range: 0-255 Units 0.02 Seconds Default Maximum Line Data Rate: sets maximum line data rate modulation technique that modem will support connection. Register Value Communications Supported Maximum Data Rate determined autobaud function Command Connect using V.23, asymmetrical modem modulation, 1200/75 Connect using Bell 202, asymmetrical modulation, 1200/150 V.21, 103, Reserved V.22, Bell 212A 1200 V.22bis 2400
Embedded Modem Responses
Numeric Full Word CONNECT RING CARRIER ERROR CONNECT 1200 DIAL TONE BUSY ANSWER CONNECT 2400 CONNECT 1200TX/75RX CONNECT 75TX/1200RX CONNECT 1200TX/150RX CONNECT 150TX/1200RX Description Successfully executed command line connection Ring signal detected Carrier detected/lost Error command line 1200 connection dial tone detected Busy signal detected second silence detected 2400 Connection V.23 Connection transmitting 1200 V.23 Connection transmitting Bell Connection transmitting 1200 Bell Connection transmitting
XECOM
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XE924M
COMMANDS TRANSCEIVER
Interface When communications initiated from remote modem, XE924M switches wireless commands after modem connection established. These commands control configuration wireless link. Command Line Format Wireless Command lines issued XE924M follow same format those modem commands Each command begins with prefix ends with carriage return. commands issued communications controller modem data rate; there autobaud function. modem uses command prefix automatically determine parity incoming characters. Command Prefix Each command, except command, begins with prefix. either both upper case both lower case cannot different cases. prefix identifies parity commands comparing parity bits characters. Command Line Commands strung together single command line characters. Commands command string executed sequence they appear. Omitted Parameters Most commands include parameter which determines function setting. When command parameter omitted from command string, assumed Result Codes modem normally issues result code after each action. Result codes provided full words, digit numeric codes, disabled together. Each result code ends with carriage return when numeric result codes chosen. When full word result codes chosen, Line Feed Carriage Return precede follow each result code. Disconnect Sequence three character sequence initiates disconnect wireless link. sequence assigned disconnect link.
XECOM
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XE924M
Embedded Wireless Commands
asterisk indicates factory default Answer Command forces smart transceiver respond summons from another wireless device. Initiate Wireless Link attempts establish connection with transceiver address Identification displays product identification code. Display Product Code Display Product Name Display Model Number Display Copyright Display Firmware Revision Result Code Display determines results codes will displayed. Display Result Codes Display Result Codes Value Register Sn=? Read Value Register Response Type selects Full Word Numeric responses Numeric Responses Full Word Responses Reset executes soft Reset Reset Values Stored User Profile Reset Values Stored User Profile Restore Factory Settings returns configuration commands registers their factory default values. View Active Configuration sends active configuration data system host.
Store Current Configuration loads current XE900M configuration into either User Profile User Profile load configuration into User Profile load configuration into User Profile Wireless Broadcast Mode initiates wireless broadcast mode diagnostic purposes. Count-Off Request (ASCII) Initiates "count-off' sequence network with node status reported ASCII format.
Count-Off Request (Hex) Initiates "count-off' sequence network with node status reported hexadecimal format. Check RSSI Level Displays current Wireless received signal levels Display single value Display Values Display continuous values
XECOM
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XE924M
Wireless Configuration Registers
Answer Wireless Link Request: determines XE900M will automatically respond wireless link request. S0=0 S0=1 Automatic response link requests Automatically respond link requests Bit-mapped Register stores values commands. S105 XE900M Number S105 sets number XE900M. Each unit Base Access Network required have unique number. number Base Access Point always Range: 2-254
Wireless Disconnect Character sets ASCII character used link disconnect sequence. default character tilde "~". Range: 0-255 Default:
S106 Noise Threshold S106 S108 Transmit Level Control S108 sets transmit level XE900M. Range: Units: S110 Frequency Channel S110 selects frequency channel wireless communications. channels spaced 200KHz intervals from 902.5 927.5 Range: 1-126 Default: (916.5 MHz) 0-63 Default:
Disconnect Guard Timer sets value guard timer milliseconds before after disconnect sequence. characters other than disconnect sequence received within window defined link will disconnected. Range: Units: 0-255 Milliseconds Default:
Wireless Responses
Numeric Full Word CONNECT RING DISCONNECT ERROR BUSY WAIT Description Successfully executed command line Wireless Connection Established Wireless Link Request Detected Failed Establish Lost Wireless Link Error command line Link Request Time occurred Wireless Link available
XECOM
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XE924M
XE924M COMMUNICATIONS FREQUENCIES
XE924M utilizes 126, channels data transfer. communications channel selected Register S110. address communications channels shown below. Channel Address Frequency (MHz) 902.5 902.7 902.9 903.1 903.3 903.5 903.7 903.9 904.1 904.3 904.5 904.7 904.9 905.1 905.3 905.5 905.7 905.9 906.1 906.3 906.5 906.7 906.9 907.1 907.3 907.5 907.7 907.9 908.1 908.3 908.5 908.7 Channel Address Frequency (MHz) 908.9 909.1 909.3 909.5 909.7 909.9 910.1 910.3 910.5 910.7 910.9 911.1 911.3 911.5 911.7 911.9 912.1 912.3 912.5 912.7 912.9 913.1 913.3 913.5 913.7 913.9 914.1 914.3 914.5 914.7 914.9 915.1 Channel Address Frequency (MHz) 915.3 915.5 915.7 915.9 916.1 916.3 916.5 916.7 916.9 917.1 917.3 917.5 917.7 917.9 918.1 918.3 918.5 918.7 918.9 919.1 919.3 919.5 919.7 919.9 920.1 920.3 920.5 920.7 920.9 921.1 921.3 921.5 Channel Address Frequency (MHz) 921.7 921.9 922.1 922.3 922.5 922.7 922.9 923.1 923.3 923.5 923.7 923.9 924.1 924.3 924.5 924.7 924.9 925.1 925.3 925.5 925.7 925.9 926.1 926.3 926.5 926.7 926.9 927.1 927.3 927.5
XECOM
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XE924M
Part Instructions
information shown below must appear users manual system which XE924M used. XE2420 used XE924M complies with part Rules Regulations. With each device shipped, there label which contains, among other information, Registration Number Ringer Equivalence Number (REN) this product. must, upon request, provide this information your telephone company. mounting this device final assembly must made such manner preserve high voltage protection between TIP/RING Connection rest system. Typically, this accomplished maintaining minimum spacing mils between TIP/RING Traces RJ-11C Jack voltage portion system. additional circuitry attached between TIP/RING telephone line connection, unless specifically allowed rules. useful determine quantity devices connect telephone line still have these devices ring when number called. most, areas, RENs devices connected line should exceed five (5.0). certain number devices connect line, determined REN, should contact local telephone company determine maximum calling area. your system causes harm telephone network, telephone company discontinue service temporarily. possible, they will notify advance. advance notification practical, will notified soon possible. Your telephone company make changes facilities, equipment, operations procedures that could affect proper functioning your equipment. they will notified advance give opportunity maintain uninterrupted telephone service. experience trouble with this device, please contact XECOM (408) 945-6640 information obtaining service repairs. telephone company disconnect this device from network until problem been corrected until sure that device malfunctioning. device used coin service lines provided telephone company (this does apply private coin telephone applications which standard telephone lines). Connection party lines subject state tariffs.
XECOM
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XE924M
Part Compliance
XE924M designed comply with Part rules, however, approved. XE924M eligible approval because component which requires addition other components function. These other components include power supply, antenna, printed circuit board. these other components could affect Part compliance properly designed. Approvals required your system before sold united States other countries. XE924M subject rules governing both intended unintended radiation. transceiver must transmit signal compliance with Part rules governing intended radiation. Part rules also govern unintended radiation sources such Telephone line cable connected XE924M. Your system will have approved before sold; however, because XE924M utilizes band, your customers will require license.
XECOM
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XE924M
Terms Sale
Devices sold XECOM covered warranty provisions appearing Terms Sale only. XECOM makes warranty, express, statutory, implied, description regarding information forth herein, regarding freedom described devices from patent infringement. XECOM makes warranty merchantability fitness purposes. XECOM reserves right discontinue production change specifications prices time without notice. This product intended normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, high reliability applications, such military, medical life-support life-sustaining equipment, specifically recommended without additional processing authorization XECOM such application. Xecom assumes responsibility circuitry other than circuitry embodied Xecom product. other circuits, patents, licenses implied.
Life Support Policy
Xecom's products authorized Critical Components Life Support Devices Systems. Life Support Devices Systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. Critical Component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
Copyright, Xecom 2002 While Xecom, Inc. made every effort ensure that information presented here accurate, Xecom will liable damages arising from errors omission fact. Xecom reserves right modify specifications and/or prices without notice. Product mentioned herein used identification purposes only trademarks and/or registered trademarks their respective companies.
Xecom Incorporated Turquoise Street, Milpitas, 95035 Ph:408-945-6640 Fax:408-942-1346 E-Mail: info@xecom.com
XECOM
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XE924M
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