Altec AL5068S User's Manual
Contents
1. ANALOG CH A ANALOG CH B Gi c2 0 01UF NA C4 20 mu p s 2 10K 10K 19 1UF E RO Ti 4 U1 48 D I ae VCC3V PI nie C5 POTEL gt 1 MC145481DW ax PO T Motorola 10K 10K die SOCKET MODEM 7I A R9 10K L C8 c9 I SOCKET MODEM 0 01UF NA C10 SE i R10 R11 eo 1 REF VAG T 2 49 10K 10K 3 RO TI ZP 4 U2 ja Poz Deelen VEGA PI TI C12 RE er MC145481DW RU Ble PO me PO2 Motorola 10K 10K JUF PO2 PO MU A cis 8 vpp vss B1 B2 7 NA DD 8 B R16 C14 10K L 0 1UF 9 No AL5068S E00 105 Altec Electronic AG Seite 25 252. No AL5068S E00 105 Altec Electronic AG Seite 23 25 AL5068S Designer s Guide 6 3 6 3 1 6 3 2 Considerations for EMC EMC Compliance EU Countries The Socket Modem has been assessed with respect to emission of and immunity to electromagnetic disturbances and has been found to comply with the relevant harmonized standards as defined by the European EMC Directive 89 336 EEC These standards are Generic emission standards which refers to EN 55022 1998 A1 2000 Class B Generic immunity standards which refers to EN 55024 1999 Installation in Host Systems European Countries It is assumed that the Socket Modem will only assembled in host systems that comply with the EMC Directive As per definition of the EMC Directive the card and its host system will constitute an installation similar to e g a PC card modem installed in a personal computer Therefore if the host system complies with the EMC Directive there should be no need for verifying continued compliance of the complete system However note that it is the responsibility of the professional installer of Socket Modem to ensure that the complete system placed on the market complies with the Directive No AL5068S E00 105 Altec Electronic AG Seite 24 25 AL5068S Designer s Guide 7 Appendix A T 1 Schematic of external codecs
3. 3V Version AL5068SI 3V ISDN Socket Modem 3V Version and IOM 2 bus The description apply to all these isdn modems with any differences between product families noted Refer to Modem Firmware Release notes for commands applicable to modem firmware AT commands and S registers are defined in the AT Command Reference Manual 1 2 Product description Altec s AL5068S and AL5068SI 3V Socket Modem Family provides the OEM with a complete ISDN data voice speakerphone modem in a compact socket mountable module This modules enables any devices to send and receive data over the ISDN network The European EurolSDN DSS 1 ISDN network is supported The module is fully approved and homologated and conforms to the CE regulations This gives fastest time to market to ISDN enable any devices The compact size and high level of integration of the Socket Modem minimizes real estate and cost for motherboard and box modem applications Its low power consumption makes it ideal for a wide variety of embedded control applications The pin compatibility between the full range of Analog Series Socket Modems ISDN and GSM Socket Modems allows upgrading and production configurability without hardware changes As a data modem the AL5068S Socket Modem can send and receive data at speeds up to 64kbps and 128kbps in the 2 channel version B Channel protocols such as V 110 V 120 PPP transparent and X 75 are supported For X 25 networks X 31 Case A and X 31 Case B D
4. Bus Transmit Negative from ISDN S Bus Receive Positive from ISDN S Bus Receive Negative from ISDN S Bus Table 3 3 LED Interface Signal Descriptions UO Type Signal Name Description LED driver lines are open drain inverter driven 74HCT05 lines with 1 5 KO 1 10W pull up resistors DCDIND OG Active High DCD Status RXDIND OG Active High RXD Status DTRIND OG Active High DTR Status TXDIND OG Active High TXD Status No AL5068S E00 105 Altec Electronic AG Seite 12 25 AL5068S Designer s Guide Table 3 4 Serial Interface Signal Descriptions Request To Send TTL Active Low RTS is used to condition the local modem for data transmission and during half duplex operation to control the direction of data transmission On a full duplex channel RTS OFF maintains the modem in a non transmit mode A non transmit mode does not imply that the ISDN link have been terminated RTS input ON causes the modem to transmit data on TXD when CTS becomes active Received Data TTL Active Low The modem uses the RXD line to send data received from the ISDN line to the DTE and to send modem responses to the DTE During command mode RXD data represents the modem responses to the DTE Modem responses take priority over incoming data when the two signals are in competition for RXD Transmitted Data Active Low The DTE uses the TXD line to send data
5. HDLC transparent PPP sync async RFC 1662 X 75 B channel protocols Bit transparent X 31 X 25 V 110 V 120 Firmware Updates Firmware updates can always be affected via the local serial interface Supported Interfaces The major hardware signal interfaces of the AL5068S Series Socket Modem are illustrated in Figure 1 1 TTL RJ45 Serial Interface Modular Jack 8 pole Modem Module Test Interface 4 optional Optional IOM 2 Interface for ee 4 external PCM eds Codecs Figure 1 1 Typical Serial Block Diagrams No AL5068S E00 105 Altec Electronic AG Seite 8 25 AL5068S Designer s Guide 2 7 2 8 Serial Indicator Interface DTE serial interface and indicator outputs are supported Serial Interface 8 line TTL logic serial interface to the DTE is supported LED Interface Four direct connect LED indicator outputs are supported The terminal DTE baudrate is determined automatically by the MCU firmware It provides autobaud from 9600bps to 115200bps The terminal DTE character format is fixed to 8 bits no parity and 1 stop bit There is no setting required for the DTE character format ISDN Line Interface The AL5068S Socket Modem family connects to the ISDN network So Interface spec 1 430 It supports the EDSS 1 EurolSDN protocol stack for network access IOM 2 Interface The AL5068SI 3V modem provides the IOM 2 bus External PCM codecs can be connected to use
6. Locate high frequency circuits in a separate area to minimize capacitive coupling to other circuits 8 Locate cables and connectors so as to avoid coupling from high frequency circuits 10 Ifa multilayer board design is used make no cuts in the ground or power planes and be sure the ground plane covers all traces 11 Minimize the number of through hole connections on traces carrying high frequency signals 12 Avoid right angle turns on high frequency traces Forty five degree corners are good however radius turns are better 13 On 2 layer boards with no ground grid provide a shadow ground trace on the opposite side of the board to traces carrying high frequency signals This will be effective as a high frequency ground return if it is three times the width of the signal traces 14 Distribute high frequency signals continuously on a single trace rather than several traces radiating from one point 4 1 3 Other Considerations The pins of all Socket Modems are grouped according to function The ISDN interface Host interface and LED interface pins are all conveniently arranged easing the host board layout design Altec Electronic has tested the AL5068S Socket Modems for compliance with CTR3 The certificates apply only to designs that route the ISDN signals pins 1 to 4 directly to the RJ45 jack No AL5068S E00 105 Altec Electronic AG Seite 20 25 AL5068S Designer s Guide 4 2 Manufacturing Considerations T
7. VCC 3 3VDC 5 TA 25 C 3V Version No AL5068S E00 105 Altec Electronic AG Seite 15 25 AL5068S Designer s Guide 3 3 So INTERFACE The ISDN Socket Modem has all the necessary circuitry for the So Interface on board and is designed to meet the 1 430 requirements of the European ISDN Network So Bu s The TX and RX signals must be provided from the RJ45 Telco jack to pins 1 to 4 of the Socket Modem The TX and RX signal traces are to be no closer than 2 5mm 0 1 from any other traces on the main board Pin 1 To Pin 2 Modem 4 Module Ets Pin 4 RJ45 Jack 8 pole Pin Signal UO type Function 1 TX O ISDN Transmit RJ45 jack Pin 3 2 TX O ISDN Transmit RJ45 jack Pin 6 3 RX ISDN Receive RJ45 jack Pin 4 4 RX ISDN Receive RJ45 jack Pin 5 6 TX O ISDN Transmit RJ45 jack Pin 3 7 RX ISDN Receive RJ45 jack Pin 4 8 RX ISDN Receive RJ45 jack Pin 5 9 TX O ISDN Transmit RJ45 jack Pin 6 No AL5068S E00 105 Altec Electronic AG Seite 16 25 AL5068S Designer s Guide 3 4 External Reset Interface The AL5068S Socket Modem provides an external RESET input pin This signal is used to force a reset procedure by providing low level during at least 100uS This signal has to be considered as an emergency reset only A reset procedure is already driven by an internal hardware during the power
8. analog voice interfaces see application notes Power consumption and power down modes To reduce power consumption of the AL5068S a power down mode can be activated by the AL5068S The following values are approximate power consumption values in the different states Condition Power usage Power down TBD ISDN active 27 mA Command Sets and S Registers Modem operation is controlled by AT and S Register Commands issued by the DTE Refer to the AT commands for the AL5068S Modem Reference Manual No AL5068S E00 105 Altec Electronic AG Seite 9 25 AL5068S Designer s Guide 3 HARDWARE INTERFACE 3 1 Interface Signals The ISDN Socket Modem pin assignments with DTE serial TTL interface are shown in Figure 3 1 and are listed in Table 3 1 3 2 Signal Descriptions The Socket Modem interface signals are described in Table 3 2 3 3 and 3 4 The digital electrical characteristics are listed in Table 3 5 The absolut maximum ratings are listed in Table 3 6 No AL5068S E00 105 Altec Electronic AG Seite 10 25 AL5068S Designer s Guide Figure 3 1 Serial TTL Pinout DCDIND RXDIND DTRIND TXDIND d lt z o E D O RX TX DCDIND RXDIND DTRIND TXDIND Table 3 1 Serial TTL Signals OPTIONAL Pin Name UO Type Pin Name UO Type 1 TX So BUS Standard 33 RTSTTL Input 2 TX So BUS Standard 34 RXDTTL Output 3 RX S BUS Standard 35 TXDTT
9. and B channel is supported The integrated X 3 PAD can be used for data transfer to the X 25 network The AL5068SI 3V Socket Modem supports Voice features By adding two external PCM Codecs the modem supports two independent analog voice ports Digital voice transfer is also supported No AL5068S E00 105 Altec Electronic AG Seite 5 25 AL5068S Designer s Guide 1 3 1 4 Features D Channel Protocols DSS1 X 31 D Channel B Channel Protocols HDLC transparent PPP async sync RFC1662 X 75 V 120 V 110 X 31 X 25 ISDN SO 1 430 Interface Several Dial Procedures AT commands Auto Connect X 3 PAD intergrated Command Interpreters with standard AT Commands Trace Log Buffers Caller ID access control Firmware updatable Optional analog voice interface Programmable EAZ MSN Advice of charge Hardware based ISDN modem controller Worldwide operation Complies to CTR3 and other country requirements Built in host DTE interface with speeds up to 230 4 kbps Serial ITU T V 24 EIA TIA 232 E logical interface Flow control RTS CTS and speed buffering Automatic format Speed sensing 3 3V 5V DC Operation Typical power use 130 mW Normal Mode Compact size 64 5 x 26 5 mm EMC approved according EN50081 EN55082 EN55022 EN55024 Safety approved according EN60950 2001 Network approved according TBR3 2 Years warranty Command Sets and S Registers Modem operat
10. 1 from any other traces for European applications 6 Ifthe Socket Modem is mounted flush with the host PCB the host PCB should be clear of all traces directly underneath the Socket Modem oscillator section It is strongly suggested that the Socket Modem is mounted at least 0 130 inch above the host board See section 4 4 No AL5068S E00 105 Altec Electronic AG Seite 19 25 AL5068S Designer s Guide 4 1 2 Electromagnetic Interference EMI Considerations The following guidelines are offered to specifically help minimize EMI generation Some of these guidelines are the same as or similar to the general guidelines but are mentioned again to reinforce their importance In order to minimize the contribution of the Socket Modem based design to EMI the designer must understand the major sources of EMI and how to reduce them to acceptable levels 1 Keep traces carrying high frequency signals as short as possible 2 Provide a good ground plane or grid In some cases a multilayer board may be required with full layers for ground and power distribution 3 Decouple power from ground with decoupling capacitors as close to the Socket Modem module power pins as possible 4 Eliminate ground loops which are unexpected current return paths to the power source and ground 5 Decouple the power cord at the power cord interface with decoupling capacitors Methods to decouple power lines are similar to decoupling telephone lines 7
11. 85 F Humidity 90 non condensing 90 non condensing No AL5068S E00 105 Altec Electronic AG Seite 22 25 AL5068S Designer s Guide 6 1 6 1 1 6 2 6 2 1 6 2 2 SOCKET MODEM APPROVALS The Socket Modem module is approved as a host independent modem card To maintain type approvals permits and or licenses valid the guidelines described in this document must be followed Considerations for Telecom Approvals The Socket Modem has been assessed and has been found to comply with the relevant harmonized standards as defined by the European ETSI Directive ETSI TC TE These standards are TBR3 CTR3 ISDN Connection The Socket Modem can be connected to the SO Bus of the ISDN Telephone Network either a by using a 4 wire flying cable to connect pins 1 to 4 of the module to an RJ 45 connector which can be assembled in a suitable location of the host system enclosure OR b by providing traces on the host system motherboard for the ISDN connection signals between the card and an RJ 45 connector If connection option a is used the cable and its installation inside the host system must be in accordance with the guidelines in IEC950 EN60950 e g the insulation material must withstand electric strength tests as described in section 3 4 If connection option b is used NO additional components must be connected to the SO Bus signals Other components not intended for use with this design may affect the networ
12. AL5068S Designer s Guide ISDN Socket Modem AL5068S AL5068S 3V Series Designer s Guide RELEASED 13 SEPTEMBER 2006 AX altec No AL5068S E00 105 Altec Electronic AG Seite 1 25 AL5068S Designer s Guide Information provided by Altec Electronic AG is believed to be accurate and reliable However no responsibility is assumed by Altec Electronic for its use nor any infringement of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Altec Electronic other than for circuitry embodied in Altec products Altec Electronic reserves the right to change circuitry at any time without notice This document is subject to change without notice Product names or services listed in this publication are for identification purposes only and may be trademarks or registered trademarks of their respective companies All other marks mentioned herein are the property of their respective owners 2006 Altec Electronic AG Printed in Switzerland All Rights Reserved No AL5068S E00 105 Altec Electronic AG Seite 2 25 AL5068S Designer s Guide TABLE OF CONTENTS de NTRODUC TION sedens neen arn enne ane 5 dl OVEN ET 5 1 2 Product ES Chi PIONS etudes oH oo Cet cute To PC eR IH TRI A es 5 Ted EE 6 1 4 Command Sets and S Registers see 6 2 TECHNICAL OVERVIEW evccasec ates vec testis ese ser etsi ter Go edes eter e
13. Gaieiv nnen 23 6 2 1 Conditions for Maintaining Safety Compliance nnn 23 6 2 2 Power Supply EN60950 1 2001 1 6 eenen 23 6 3 Considerations for EMO ende ned deg ned pda 24 6 3 1 EMC Compliance EU Countries eeeeeeeeee eee eee eee 24 6 3 2 Installation in Host Systems European Countries 24 T2 PRC UB usus MM RM M EI IMMER EE 25 7 1 Schematic of external codecs 2 cccccccenceececeneceneceneeeneeeneceneeeneeeeeneneeeneeent 25 No AL5068S E00 105 Altec Electronic AG Seite 3 25 AL5068S Designer s Guide List of Figures FIGURE 1 1 TYPICAL SERIAL BLOCK DIAGRAMS sess 8 FIGURE 3 1 SERIAL TTL PINOUT WEEN 11 FIGURE 4 1 AL5068S SOCKET MODEM PHYSICAL DIMENSIONS 22 List of Tables TABLE 3 1 SERIAL TTL SIGNALS se dr S deus 11 TABLE 3 2 SIGNAL DESCRIPTIONS eterni ropes ee ee ee ee ee ee ee ee Re Re nanne 12 TABLE 3 3 LED INTERFACE SIGNAL DESCRIPTIONS son inten oet et etes 12 TABLE 3 4 SERIAL INTERFACE SIGNAL DESCRIPTIONS 13 TABLE 3 5 DIGITAL ELECTRICAL CHARACTERISTICS e 14 TABLE 3 6 ABSOLUTE MAvIMUMRATNGS Henn 15 No AL5068S E00 105 Altec Electronic AG Seite 4 25 AL5068S Designer s Guide 1 INTRODUCTION 1 4 Overview This Designer s Guide describes the hardware for the following ISDN socket modems of Altec Electronic AG AL5068S ISDN Socket Modem 5V Version AL5068S 3V ISDN Socket Modem
14. L Input 4 RX So BUS Standard 36 RITTL Output 5 No pin 37 DSRTTL Output 6 TX So BUS S2 option 38 CTSTTL Output 7 RX S BUS S2 option 39 DCDTTL Output 8 RX So BUS S2 option 40 DTRTTL Input 9 TX So BUS S2 option 41 GND Ground 10 Nopin 42 NC 11 Nopin 43 NC 12 Nopin 44 DU IOM 2 Bus Optional 13 No pin 45 DD IOM 2 Bus Optional 14 No pin 46 DCL IOM 2 Bus Optional 15 No pin 47 FSC IOM 2 Bus Optional 16 Nopin 48 No pin 17 No pin 49 No pin 18 No pin 50 No pin 19 No pin 51 No pin 20 Nopin 52 Nopin 21 No pin 53 Nopin 22 Nopin 54 No pin 23 No pin 55 No pin 24 RESET Input 56 No pin 25 No pin 57 Nopin 26 GND Ground 58 No pin 27 NC NC 59 No pin 28 NC NC 60 No pin 29 DCDIND LED Driver Output 61 VCC Power 30 RXDIND LED Driver Output 62 NC NC 31 DTRIND LED Driver Output 63 GND Ground 32 TXDIND LED Driver Output 64 NG NC No AL5068S E00 105 Altec Electronic AG Seite 11 25 AL5068S Designer s Guide Table 3 2 Signal Descriptions Signal Name Description 5 VDC 3 3 VDC Ground Connect to Digital Ground on the interface circuit Modem Reset The Active Low RESET input resets the Socket Modems logic and returns the AT command set to the original factory default values and to stored values in NVRAM RESET is connected to a built in reset circuit on the Socket Modem This input is 5V tolerant Transmit Positive from ISDN S
15. ains the connection established by the DTE manual answering or internally automatic answering DTR OFF places the modem in the disconnect state under control of the AT Command AT amp Dx DTRTTL IA No AL5068S E00 105 Altec Electronic AG Seite 13 25 AL5068S Designer s Guide Table 3 5 Digital Electrical Characteristics Parameter Test Condition Input Voltage Type IA Type IC 5V tolerant 5V tolerant Output Voltage Type IA Type IC Input High Voltage Type IA Type IC Input Low Voltage Type IA Type IC Output High Voltage Type OA Type OG ILOAD 4 0 MA lLoAD 1 0mA Output Low Voltage Type OA Type OG lLoAD 4 0 mA lLoAD 1 0 mA Three State Leakage Current 3 3 0 5V Vin 3 3 0 5V Circuit Types Type IA Type IC Type OA Notes 1 Test Conditions VCC 5 TA o to 70 C Vee 3 3V 5 TTL RESET TTL with 3state No AL5068S E00 105 Altec Electronic AG Seite 14 25 AL5068S Designer s Guide Table 3 6 Absolute Maximum Ratings Parameter Test Condition Supply Voltage 5V Version 3V Version Input Voltage Nominal Supply Voltage 5V Version 3V Version Static Discharge Voltage 25 C Operating Temperature Range Storage Temperature Range Supply Current Notes Test Conditions VCC 5VDC 5 TA 25 C 5V Version
16. he Socket Modem has been designed to be mounted onto the host board in one of two ways The first method consists of soldering two 32 pin strip sockets to the host board and inserting the Socket Modem into the sockets A suggested part number for the 32 pin socket is Sam Tec SMM 132 01 F S The second way is to solder the Socket Modem directly to the host board The most efficient way to do this is through a wave solder process The recommended hole size for the Socket Modem pins is 0 036 in 0 003 in in diameter Spacers can be used to hold the Socket Modem vertically in place during the wave solder process A spacer should be placed on pin 32 and pin 64 of the Socket Modem A suggested part number for the spacer is BIVAR 938 0 130 for P1 0 310in option Socket Modems The spacers can be left on permanently and will not effect operation Socket Modems can be put through a water wash process No AL5068S E00 105 Altec Electronic AG Seite 21 25 AL5068S Designer s Guide 5 PACKAGE DIMENSIONS Figure 4 1 AL5068S Socket Modem Physical Dimensions 64 5mm 2 54 oooooooooo 7 6mm jt 0mm 6 5mm oooooooooo 20 5mm 1 6mm Wim ooooooooe ooooooooo 26 5mm 1 04 AL5068S Dimensions Europe US Width 26 5 mm 1 05 Height 14 1 mm 0 55 Length 64 5 mm 2 55 Weight 12g 0 42 oz Operating temperature 0 70 C 32 160 F Storage temperature 10 85 C 14 1
17. hickness and geometry etc component selection composition value and tolerance interface connections and shielding are required for the board design to achieve desired modem performance and to attain certification The aspects of proper engineering practices are beyond the scope of this designer s guide The designer should consult noise suppression techniques described in technical publications and journals electronics and electrical engineering text books and component supplier application notes Technical and professional associations as well as component suppliers often offer seminars addressing noise suppression techniques PC Board Layout Guidelines General 1 Ina 4 layer design provide an adequate ground plane covering the entire board Socket Modem DGND and AGND pins are tied together on the Socket Modem 2 As a general rule route digital signals on the component side of the PCB and the analog signals on the solder side The sides may be reversed to match particular OEM requirements Route the digital traces perpendicular to the analog traces to minimize signal cross coupling 3 Route the modem signals to provide maximum isolation between noise sources and noise sensitive inputs When layout requirements necessitate routing these signals together they should be separated by neutral signals 4 All power and ground traces should be at least 0 05 in wide 5 ISDN SO signal traces are to be no closer than 2 5mm 0
18. ion is controlled by AT and S Register Commands issued by the DTE Refer to the AT commands for the AL5068S Reference Manual No AL5068S E00 105 Altec Electronic AG Seite 6 25 AL5068S Designer s Guide 2 1 2 2 2 2 1 2 2 2 TECHNICAL OVERVIEW Dialing procedures The following dial procedures are supported e AT commands e Auto connect Hotline call e X 3 PAD AT Commands Via AT Commands you may control the ISDN connections and change the configuration of the AL5068S ISDN specific configuration commands are supported Configuration Commands A range of parameters can be controlled by the configuration commands of the AL5068S as listed below e Setting own msn number e Recommended B channel protocol e Serial Interface Parameters baud rate flow control etc e AT Auto connect operation mode e Firmware download AT Connection Commands Command Function Response ATDxxx Establishes an ISDN connection CONNECT ATH Disconnects an ISDN connection OK Whenever the ISDN connection with a communication partner is established a transparent channel for serial data is provided A detailed description of the AT Commands is found in the AT Command manual for the socket modem AL5068S No AL5068S E00 105 Altec Electronic AG Seite 7 25 AL5068S Designer s Guide 2 3 2 4 2 5 ISDN Protocols ISDN Channel Protocols I DSS1 D channel protocols X 31 D channel
19. k access characteristics of the modem and may therefore invalidate the type approvals permits and or licences In both cases for the connection between the host and the PSTN wall connector a cable with RJ 45 modular jack and an appropriate national plug must be used Considerations for Electrical Safety Conditions for Maintaining Safety Compliance The Socket Modem has been assessed with respect to electrical safety and has been found to comply with relevant standards as defined by the European Low Voltage Directive 72 23EEC The particular standard is EN 60950 1 2001 The card is rated as Class III equipment and it is intended for use in Pollution Degree 2 environments only see EN60950 1 2001 2 10 4 Material Group Illa or IIIb Comparative Tracking Index below 400 according o IEC 112 method A is assumed for any host system PCB that has traces and or circuitry with TNV potential It is assumed that the modem card will only be assembled in a host system unit that complies with IEC60950 EN60950 Some particular requirements are see EN60950 1 2001 2 1 1 2 2 2 3 2 9 2 10 and 4 7 3 2 Power Supply EN60950 1 2001 1 6 Before installing the Socket Modem in a host system the installer must ensure that the power drawn by the card together with the host and any auxiliary cards drawing power from the host is within the rating of the host power supply unit The Socket Modem s power consumption is typically 0 15 W 5 0 Vdc
20. ra eia bes tna 7 2 Dialing procedures EE 7 22 SE Point cp DU E 7 2 2 1 Configuration Commands toteteteekelstenstedetendteletontetekendelekoutelet eunte 7 2 2 2 AT Connection Commands sss nene 7 29 SDN Protocol Siea a a a a a ai 8 24 terre lee 8 2 0 SUPPORMEC IMEMACES dE 8 2 7 Power consumption and power down modes nnee ennen 9 2 8 Command Sets and S Registers nnen neee eeeee nennen 9 3 HARDWARE INTERFACE nennen eee nenenenennneeeeeeneennnnnnnnnnnenreerenn 10 Sech rte 10 da Signal De SCIIPNONS i ei ak ene n nee nwo nee nua nonet in dss 10 99 So UNTEREAC Et eerte eter cute eee chee eS AAT LL ee eh E yk 16 3 4 External Reset Interface rerserrenenenensnenensdenenenenetahenedrbenekanekthenadskeheke EN 17 3 4 1 Recommended Reset Circuit nennen Re ee ee ee ee aet ee aet ee ee ee aaa ee ee Re 17 3 5 TIOM 2 Bus Interface detiene a aoa EE ENG 18 4 DESIGN CONSIDERATIONS ee 19 4 14 PC Board Layout Guidelines enmet eenen eve ERR EE Hexe Fez 19 Alet GES PU 19 4 1 2 Electromagnetic Interference EMI Considerations 20 4 1 3 Other Considerations ee RR 20 4 2 Manufacturing Considerations nanne nennen nennen eenen 21 5 PACKAGE DIMENSIONS nennen eenennnnnnnnneeeneeeeennnnnnnnnnneneeenenn 22 6 SOCKET MODEM APPROVALS nn ereeeneneeerenennnnnnnnnneneeenenenn 23 6 1 Considerations for Telecom Approvals aaa ee ee ee eee 23 0 1 1 SDN GONE CIOs rc t 23 6 2 Considerations for Electrical
21. ription of all the AT commands regarding the voice modes For a detailed schematic refer to Appendix A in this manual No AL5068S E00 105 Altec Electronic AG Seite 18 25 AL5068S Designer s Guide 4 4 1 4 1 1 DESIGN CONSIDERATIONS Good engineering practices must be adhered to when designing a printed circuit board PCB containing the AL5068S Socket Modem module Suppression of noise is essential to the proper operation and performance of the modem itself and for surrounding equipment Two aspects of noise in an OEM board design containing the AL5068S Socket Modem module must be considered on board off board generated noise that can affect analog signal levels and analog to digital conversion ADC digital to analog conversion DAC and on board generated noise that can radiate off board Both on board and off board generated noise that is coupled on board can affect interfacing signal levels and quality especially in low level analog signals Of particular concern is noise in frequency ranges affecting modem performance On board generated electromagnetic interference EMI noise that can be radiated or conducted off board is a separate but equally important concern This noise can affect the operation of surrounding equipment Most local government agencies have stringent certification requirements that must be met for use in specific environments Proper PC board layout component placement signal routing trace t
22. to the modem for transmission over the ISDN network or to transmit commands to the modem The DTE should hold this circuit in the mark state when no data is being transmitted or during intervals between characters Clear To Send TTL Active Low CTS is controlled by the modem to indicate whether or not the modem is ready to transmit data CTS ON together with the RTS ON DSR ON and DTR ON where implemented indicates to the DTE that signals presented on TXD will be transmitted to the ISDN network CTS OFF indicates to the DTE that it should not transfer data across the interface on TXD CTS ON is a response to DTR ON and RTS delayed as may be appropriate for the modem to establish an ISDN connection CTSTTL OA Ring Indicate TTL Active Low RI output ON low indicates the RITTL OA presence of ALERTING on the ISDN network Data Set Ready TTL Active Low DSR indicates modem status to the DSRTTL OA DTE DSR OFF high indicates that the DTE is to disregard all signals appearing on the interchange circuits except Ring Indicator RI Data Carrier Detect TTL Active Low DCD output is ON low when a DCDTTL OA link is established over the ISDN network and is OFF high when no link is present Data Terminal Ready TTL Active Low The DTR input is turned ON low by the DTE when the DTE is ready to transmit or receive data DTR ON prepares the modem to be connected to the ISDN network and maint
23. up sequence If no external reset is necessary this input can be left open If used emergency reset it has to be driven by an open collector or an open drain 3 4 1 Recommended Reset Circuit RESET PIN 24 SWITCH RESET NPN Switch Reset Reset Pin 24 Reset Status 1 0 Active 0 1 Inactive Additional comments on RESET The reset process is activated either by the external Reset signal OR by an internal signal coming from the internal RESET generator This automatic reset is activated at power up The module remains in reset mode as long as the reset signal is held low As soon as the reset is complete the AT interface answers OK to the application No AL5068S E00 105 Altec Electronic AG Seite 17 25 AL5068S Designer s Guide 3 5 IOM 2 Bus Interface The AL5068SI 3V ISDN Modem supports 2 independent analog channels by adding 2 external PCM Codecs This Codecs are connected to the IOM 2 bus on pins 44 47 of the socket modem It is possible to setup 2 simultaneous links for both incoming and outgoing calls The serial port remains in command state in this mode The 2 external Codecs are marked with Codec A and Codec B Each Codec A or B can have his own MSN Each call can therefore be directed to a specific Codec There are 2 additional I O signals to drive the B Channel source of each Codec Please refer to the AL5068S AT Commands Reference Manual chapter 9 for a detailed desc
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