PRELIMINARY CH224ATF CH224ATF Complete 2400 bps Modem Module INTRODUCTION FEATURES The CH224ATF is a complete FCC Part 68 preapproved, 2400 bps full function modem solution; incorporating an on-board Data Access Arrangement (DAA) in a small footprint, socket-able packaging format (2.5” L x 1.0 W x 0.45” H). • • • • • This product is specifically designed for use as direct re-placement for Conexant/Rockwell’s SocketModem (serial TTL I/O option, Part No. SF224ATF-H1-D5-A0-P1). • This modem provides a fast and convenient way to integrate a PSTN connectivity into any OEM product while utilizing a small portion of PCB area. The CH224ATF requires two external interfaces: a CCITT V.24 serial interface that is routed directly from the UART or UART interface, and a TIP and RING interface, which is connected directly to a conventional RJ-11 jack for the PSTN line connection. The CH224ATF also has various indicator and status lines to monitor operations or to establish triggers. The CH224ATF modem is controlled by industry standard “AT” commands and is compatible with available industry communication software. The device supports asynchronous operation at 2400 bps, 1200 bps, and 300 bps to both Bell and CCIT standards. The resident PSTN line interface is FCC Part 68 approved, and is also Canadian DOC approveable, and can be approved in other countries that require 1500VAC RMS isolation. • • • • • • • • • • • • FCC Part 68 pre-approved UL1950, 3rd edition listed 1500 Vrms isolation Complete solution: on-board DAA Data modes - CCITT v.22 bis (2400 bps), V.22 (1200 bps) - Bell 212A (1200 bps) and 103 (300 bps) Enhanced AT commands Group 3 fax modes V.29 (6900/7200 bps) transmit V.27 ter (4800/2400 bps) transmit and receive V.21 Channel 2 (300 bps) transmit and receive EIA-578 Service Class 1 commands V.42/MNP2-4 and V.42 bis/MNP5 support without additional hardware Data/fax discriminator and auto answering Communications software compatible Serial asynchronous DTE interface NVRAM interface allows storage of two user configurations and four 36-digit dial strings Automatic adaptive/ fixed compromise equalization Programmable sleep mode Full-duplex data mode test capabilities: Analog loop, local digital loop, and remote digital loop Half-duplex fax mode test capabilities Automatic format/speed sensing Low power consumption (typical): Interface Serial TTL: • Operating 155mW Sleep 35mW Single +5VDC power supply 1 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF PART NUMBER ORDERING INFORMATION Part Number CH224ATF Description Data/Fax modem module with TTL serial interface, on-board DAA, 0.310” pins TECHNICAL SPECIFICATIONS General The CH224ATF modem is a full-featured, selfcontained data/fax solution. External microcontroller for data or fax control functions are fully supported and controlled through the AT command set. Data modes perform complete handshake and data rate negotiations. All tone and pattern detection required by the applicable CCITT or Bell standard are supported. Operation Modem operation is controlled by AT commands (Table 2), fax service class 1 commands (Table 3), and supporting S registers (Table 4). Result codes and messages are listed in Table 5. Data Modes: Data rate selection is determined by the speed of the originating and answering modems: Originate Modem Rate (bps) Fax modes support Group 3 fax requirements. Fax data and fax control (V.21 300 bps) performed by the modem is controlled and monitored through the fax EIA-578 Class 1 insertion/deletion, and CRC generation/checking is provided. Both transmit and receive fax data is buffered within the modem. Data transfer to and from the DTE is flow controlled by XON/XOFF. Connect Speed Based on Answer Modem Rate (bps) 300 1200 2400 300 300 300 300 1200 1200 1200 1200 2400 1200 1200 2400 Fax Modes: Fax modes are negotiated as defined in T.30 and are implemented by AT+F commands. The AT+FCLASS=1 command causes entry into the fax mode from the data mode. Most other fax class 1 commands, which start with the AT+F prefix, are valid only in the fax mode. All data commands are valid in the fax mode except A/, On & Tn, and the escape sequence (+++). The AT+FCLASS=0 command terminates the fax mode and causes entry into the data mode. Configurations and Rates The supported modem configurations and signaling rates are listed in Table 1. In data modes with serial interface selected, DTE rate offsets of +1%, -2.5% are accommodated by adding/deleting stop bits are required. In fax modes, the DTE rate is 19200 bps. Table 1. Configurations and Rates Configuration Modulation Data Mode V.22 V.22 Bell 212A Bell 103 QAM DPSK DPSK FSK Fax Mode V.29 V.22 Bell 212A Bell 103 QAM DPSK DPSK FSK Transmitter Carrier Frequency (Hz) +0.01% Answer 2400 2400 2400 2225 2025 S Receive N/A N/A 1800 1800 1650 M 1850 S Originate 1200 1200 1200 1270 M 1070 S Transmit 1700 1700 1800 1800 1650 M 1850 S Data Rate (bps) Baud (Symbols/Sec.) Bits Per Symbol Constellation Points 2400 1200 1200 300 600 600 600 300 4 2 2 1 16 4 4 1 9600 7200 4800 2400 300 2400 2400 1600 1200 300 4 3 3 2 1 16 8 8 4 1 Notes: Legend: QAM = Quadrature Amplitude Modulation DPSK = Differential Phase Shift Keying FSK = Frequency Shift Keying M = Mark Condition S = Space Condition N/A = Not Applicable 2 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF Table 2. “AT” Command Set Summary Command Function Table 3. Fax Command Set Summary Fax Command Function A/ A Bn Cn Dn En F1 Hn In Ln Mn On P Qn Sn Sn=v Sn? T Vn Xn Yn Zn &Cn &Dn &F &Gn &Jn &L0 &M0 &Pn &Q0 &Sn &Tn &V &Wn &X0 &Yn &Zn=x %Dn %J %Ln Dial Modifier P R S=n T W ; Re-execute command Answer a call Select CCITT or Bell Mode Carrier control Dial modifier Command echo On-line character echo option Disconnect (Hangup) Identification Speaker volume Speaker control Go on-line Force pulse dialing Quiet Result codes control Select S register as default Set default S register to value Return the value of S register Force DTMF dialing Report codes form Extended result codes Long space disconnect Soft reset and restore profile RLSD (DCD) option DTR option Recall (restore)factory profile Select guard tone Telephone jack control Dial-up line operation Asynchronous mode Pulse dial make/break ratio Asynchronous mode DSR override Test and diagnostic Display current configurations Store current configuration Asynchronous data transmission Select default profile Store dial string to location n DTMF Level Attenuation Load Secondary Defaults Transmit Level Attenuation Function Pulse Dial Originate Call in Answer Mode Dial Stored Number Tone Dial Wait for Dial Tone Return to Idle State +FCLASS=n +F<command>? +F<command>=? +FAA=n +FF +FTS=n +FRS=n +FTM=n +FRM=n +FTH=n +FRH=n +FRTn +FTTn=m +Hn @ ! , 0-9, A, B, C, D, #, * Wait for Quiet Answer Command Flash Hook Pause Dial Digits/ Characters Service class Report Active Configuration Report Operating Capabilities Data/Fax Auto Answer Enhanced flow Control Stop Transmissions & Wait Receive Silence Transmit Data Receive Data Transmit Data with HDLC Framing Receive Data with HDLC Framing Receive Test Data Transmit Test Data Rockwell Protocol Interface (RPI Enable Table 4. Register Summary Register Function S0* Rings to Auto-Answer S1 Ring Counter S2 Escape Character S3 Carriage Return Character S4 Line Feed Character S5 Backspace Character S6 Maximum time to Wait for Dial Tone S7 Wait for Carrier S8 Pause Time for Comma S9 Carrier Detect Response Time S10 Carrier Loss Disconnect Time S11 DTMF dialing Speed S12 Escape Prompt Delay S14* General Bit mapped Options S16 Test Mode Bit Mapped Options (&T) S17 Fax Mode Null Byte Timer S18* Test Timer S19 Rockwell Protocol Interface Speed S20 Fax Mode Inactivity Timer S21* General bit Mapped Options S22* General bit Mapped Options S23* General Bit Mapped Options S24 Sleep Inactivity Timer S25* Delay to DTR Off S26* RTS-to-CTS Delay S27* General Bit Mapped Options S28* General Bit-Mapped Options * Register value may be stored in one of two user profiles with the AT&W command. 3 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF Equalization Table 5. Results Codes & Messages Digit Code Word Code 0 OK 1 2 3 4 CONNECT RING NO CARRIER ERROR 5 6 7 8 CONNECT 1200 NO DIAL TONE BUSY NO ANSWER 10 +F4 13 CONNECT 2400 +FCERROR DATA 15 FAX Meaning Command line executed without errors Connection at 300bps Ringing signal detected Carrier lost or never present Invalid command, checksum, error in command line, or command line exceeds 40 characters Connection at 1200 bps No dialtone detected Busy signal detected No silence detected when dialing a system not providing a dialtone Connection at 2400 bps Fax carrier error Connected as data modem during auto answer Connected as fax modem during auto answer Automatic adaptive qualization as well as fixed compromised equalization is provided to compensate for line distortions and to minimize the effects of the intersymbol interference. Scrambler/Descrambler The modem incorporates a self-synchronizing scrambler/ descrambler satisfying the applicable CCITT or Bell requirements. Transmit Level The transmit level is –10 dBm +1 dB (at TIP and RING). Answer Tone: An answer tone of 2100 Hz (V.22bis, V.22, or T.30) or 2225 Hz (Bell 212A or 103) is generated. Guard Tone: An 1800 Hz guard tone can be generated in all data modes. Data/Fax Auto Answering The modem can automatically determine if the incoming call is from a data or fax modem, make the appropriate connection, and inform the DTE of the connection type. Calling Tone: A 1100 Hz (0.5 seconds on, 3 seconds on, 3 seconds off) calling tone (T.30) is generated in the originate fax mode. AT Command Format Each command line must start with the AT prefix and be terminated with a carriage return (CR). Several commands may be included on one command line. A command line may contain up to 40 characters excluding the AT prefix and the terminating CR. A separator is not required between data commands. A semicolon (;) separator is required between fax commands. Receive Level The receiver satisfies performance rquirements for a received signal from –9 dBm to –43 dBm. The carrier detect is ON at –43 dBm and OFF at –48 dBm with a minimum of 2 dB hysteresis. AT commands are composed of 10-bit ASCII encoded asynchronous characters. The character format in data mode is 8 data bits with no parity, or 7 data bits with even, odd, or no (two stop bits) parity, at a data rate of 19200, 2400, 1200, or 300 bps. The character format in fax mode is 8 data bits with no parity at 19200 bps. Data Modulation The data modulation conforms to V.29, V.27 ter, V.22 bis, V.22, V.21, Bell212A, or Bell 103, depending on the selected configuration. Transmitter and receiver spectrum shaping is provided in accordance with the applicable standard. Receiver Tracking The modem can accommodate carrier frequency offset up to +7 Hz, and a transmit timing error of + 0.01% (V.22 bis or V.27 ter) or + 0.02% (V.22 or Bell 212A). Low Power Sleep Mode To conserve power, the CH224ATF is configured for idle (power down) mode. Idle mode is entered whenever the modem is inactive beyond the time value specified by S24. The idle mode allows reduced power consumption with automatic recovery without additional circuitry. The modem exits Idle mode and returns to full operation whenever a ring signal occurs, the DTE writes to the modem (parallel interface), or ~DTR or ~TXD is asserted (serial interface). 4 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF HARDWARE INTERFACE Serial/Indicator Interfaces A DTE serial interface and indicator output are supported. Serial Interface. A TTL logic serial interface to the DTE is supported. LED indicator interface. Four direct connect LED indicator outputs are supported. Speaker Interface A speaker output, controlled by AT or V.25 bis commands, is provided for an optional OEM-supplied speaker circuit. Line Interface The CH224ATF connects to the telco line via tip and ring signals. TTL SERIAL INTERFACE TELCO JACK & EMI FILTERING CH224ATF INDICATOR LEDS SPEAKER CIRCUIT TTL Serial Interface CH224ATF Integrated System Block Diagram LOW POWER MODES Sleep mode Entry. The modem will enter the low power sleep mode when no line connection exists and no host activity occurs for the period of time specified in the S24 register. All device circuits are turned off except the internal MCU clock circuitry in order to consume lower power, but are able to immediately wake up and resume normal operation. Wake-up. Wake-up occurs when a ring signal occurs, or the DTE sends a character to the modem. HARDWARE INTERFACE SIGNALS The SocketModem pin assignments for serial TTL interface selected are shown in Figure 2 and are listed in Table 7. The SocketModem hardware interface signals are defined in Table 9. The digital electrical characteristics for the hardware interface signals are listed in Table 10. The analog electrical characteristics for the hardware interface signals are listed in Table 11. The current absolute maximum ratings are listed in Table 13. 5 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY DAA CH224ATF TIP RING 1 2 64 63 62 61 SPKR AGND NC VCC ~RESET 24 41 40 DGND ~DTRTTL DGND NC 26 27 DCDIND RXIND ~DTRIND TXIND 29 30 31 32 39 38 37 36 35 34 33 ~DCOTTL ~CTSTTL ~DSRTTL ~RITTL ~TXDTTL ~TXDTTL NC Notes: Pins 10-23, 25, 28, and 42-53 are not installed. Figure 3. CH224ATF (Serial TTL Pinout) 6 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY Table 7. Signal Pin CH224ATF CH224ATF Serial TTL Signals I/O Type Pin Signal I/O Type 1 TIP IF 33 NC - 2 RING IF 34 ~RXDTTL OA 3 NO PIN - 35 ~TXDTTL IA 4 NO PIN - 36 ~RITTL OA 5 NO PIN - 37 ~DSRTTL OA 6 NO PIN - 38 ~CTSTTL OA 7 NO PIN - 39 ~DCDTTL OA 8 NO PIN - 40 ~DTRTTL IA 9 NO PIN - 41 DGROUND GND 10 NO PIN - 42 NO PIN - 11 NO PIN - 43 NO PIN - 12 NO PIN - 44 NO PIN - 13 NO PIN - 45 NO PIN - 14 NO PIN - 46 NO PIN - 15 NO PIN - 47 NO PIN - 16 NO PIN - 48 NO PIN - 17 NO PIN - 49 NO PIN - 18 NO PIN - 50 NO PIN - 19 NO PIN - 51 NO PIN - 20 NO PIN - 52 NO PIN - 21 NO PIN - 53 NO PIN - 22 NO PIN - 54 NO PIN* - 23 NO PIN - 55 NO PIN* - 24 ~RESET IC 56 NO PIN* - 25 N0 PIN - 57 NO PIN* - 26 DGROUND GND 58 NO PIN* - 27 NC - 59 NO PIN* - 28 NO PIN* - 60 NO PIN* - 29 DCDIND OG 61 VCC PWR 30 RXDIND OG 62 NC - 31 ~DTRIND OG 63 AGROUND GND 32 TXIND OG 64 SPKR O(DF) * It is suggested that a hole be placed in the host board for upgrade purposes. 7 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY Label I/O ~RXDTTL OA ~TXDTTL IA ~RITTL OA ~DSRTTL OA CH224ATF Table 9. Signal Designations Signal Name Designation The Serial Interface signals are all TTL-level. Received Data. Active low. The modem uses the ~RXD line to send data received from the telephone 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 to the modem for transmission over the telephone line 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. Ring Indicate. Active low. ~RI output ON (low) indicates the presence of an ON segment of a ring signal on the telephone line. The modem will not go off-hook when ~RI is active; the modem waits for ~RI to go inactive before going off-hook. For US models, ~RI will respond to ring signals in the frequency range of 15.3 Hz to 68 Hz. The ring signal cycle is typically two seconds ON, four seconds OFF. The OFF (high) condition of the ~RI input should be maintained during the OFF segment of the ring cycle (between rings) and at all other times when ringing is not being received. Data Set Ready. Active low. ~DSR indicates modem status to the DTE. ~DSR OFF (high) indicates that the DTE is to disregard all signals appearing on the interchange circuits except Ring indicator (~RI). ~DSR output is controlled by the AT&Sn command. If the AT&S1 option is selected, ~DSR will come ON in the handshaking state when carrier is detected in the originate mode or when carrier is first sent in the answer mode. In addition if a test mode is entered (AT&T1, AT&T3, AT&T6-AT&T8), ~DSR will go off while the test is running. ~DSR goes OFF if ~DTR goes OFF. ~CTSTTL OA ~DCDTTL OA ~DTRTTL IA If AT&Q0 and AT&S0 are selected, ~DSR will remain on at all times regardless of the modem’s current state. Clear To Send. Active low. ~CTS is controlled by the modem to indicate whether or not the modem is ready to transmit data. CTS OFF indicates to the DTE that it should not transfer data across the interface on TXD. In data modes, the ~CTS output is always ON. In fax modes, ~CTS is optionally used for flow control. Data Carrier Detect. Active low. When AT&C0 commands is not in effect, ~DCD output is ON when a carrier is detected on the telephone line or OFF when carrier is not detected. ~DCD can be strapped ON using AT&C0 command. Data Terminal Ready. 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 telephone line, and maintains 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 &DN and &Qn commands. The effect of ~DTR ON and ~DTR OFF depends on the &Dn and &Qn commands. Automatic answer is enabled when ~DTR is ON if the “Answer Ring count” selectable option is not set to 0. Regardless of which device is driving ~DTR, the modem will respond to an incoming 8 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF ring by going off-hook and beginning the handshake sequence. GND The response of the modem to the ~DTR signal is very slow (up to 10 ms) to prevent noise from falsely causing the modem to disconnect from the telephone line. Ground LED drivers are open-drain inverter-driven (74HCT05) lines with 1.5K ½, 1/10W pull-up resistors on-board. DCD LED indicator. Active high DCD status. RXD LED indicator. Active high RXD status. DTR LED indicator. Active high TXD status. Speaker Analog Output. The SPKR output reflects the received analog input signal. The SPKR is controlled by the ATMn command. GND DCDIND RXDIND ~DTRIND SPKR OG OG OG O(DF) SKR is tied directly to SPKR pin of the data pump. Parameter Table 10. Digital Interface Characteristics Sy Min. Typ. Max. Units mb ol V Input High Voltage Type IA Type IC Type IH Input Low Voltage Type IA and IC Input Low Voltage Type IF Input Leakage Current IA and IC Output High Voltage Type OA Type OD Type OG Output Low Voltage Type OA Type OB Type OD Type OG Three –State (Off) Current Notes: IH Vdc 2.0 3.5 -30 - -0.3 - V CC V CC 30 V IL Vdc V IL 38 I Test Conditions Vrms +10 IN - 0.8 Note 2 V IN=0 to V CC µAdc - VOH Vdc 2.4 - - V CCV CC V OL ILOAD = 100µA ILOAD = 0 mA Vdc I LOAD = 1.6 mA LOAD = 0.8 mA I LOAD = 15 mA I LOAD = 8 mA V IN=0.8 V to 4.5V I I TS +25 µAdc 1. Test Conditions: VCC = 5V + 5%, TA = 0°C to 70°C (unless otherwise stated.) Output loads: 50 pF + one TTL. 2. AC Vrms voltage between Tip and Ring, using the on-boatd modular DAA. 9 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF Table 11. Analog Characteristics Name Type SPKR Characteristic O (DF) Value Minimum Load Maximum Capacitive Load Output Impedance Output Voltage D.C Offset 300Ω 0.01µF 10Ω 2.5 + 1.6V < 20 mV Table 12. Current and Power Requirements Current (ID) Maximum Current Mode Serial TTL Normal mode Sleep mode Power (PD) Typical Maximum Power Power Typical Current @25°C @0°C @25°C @0°C 31mA 7 mA 33 mA 9 mA 155 mW 35 mW 165 mW 45 mW Notes: 1. Test conditions: 5.0 VDC for typical values; VDD = 5.25 for maximum values. Table 13. Absolute Maximum Ratings Parameter Symbol Limits Supply Voltage Input Voltage Analog Inputs Voltage Applied to Outputs in High Z State DC Input Clam Current DC Output Clamp Current Static Discharge Voltage (@25°C) Latch-Up Current (@25°C) Operating Temperature Range Storage Temperature Range V DD IN V IN V DD I IK I OK V ESD I TRIG T A T STG V -0.5 to +6.0 -0.5 to (+5VD +0.5) -0.3 to (+5VA +0.3) -0.5 to (+5VD +0.5) +20 +20 +2500 +400 -0 to +70 -40 to +80 Units V V V V MA MA V mA °C °C 10 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF Figure 5. CH224ATF Physical Dimensions 11 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY PHONE LINE CONNECTION GUIDELINES 1) The CH224ATF must be mounted in the final assembly such that it is isolated from exposure to any hazardous voltages within the assembly. Adequate separation and restraint of cables and cords must be provided. 2) The circuitry from the CH224ATF to the telephone line interface must be provided in wiring that carries no other circuitry other than that specifically allowed in the FCC rules (such as A and A1 leads). 3) Connection to phone line should be made through an RJ-11C jack. 4) PCB traces from the modem’s RING and TIP pins to the RJ-11C jack must be 0.1 inch spacing or greater to one another and 0.2 inch spacing or greater to all other traces. The traces should have a nominal width of 0.020 inches or greater. 5) The RING and TIP PCB traces should be as short as possible and oriented to prevent coupling other high speed or high frequency signals present on the host circuit PCB. 6) No additional circuitry other than that shown in Figure 7A or 7B may be connected between the modem module and the RJ-11C jack. Doing so will invalidate the FCC approval. 7) The CH224ATF requires external surge protection (see Figure 7).This is mandatory to maintain FCC Part 68 conveyed approval. 8) The CH224ATF, the RJ-11C jack, the interfacing circuitry and all PCB traces in between, must be contained on a PCB with a 94 V-0 flammability rating. 9) The supplied FCC registration label must be applied visibly on the outside of the product. 10) The product ’s User Manual must provide the user with instructions for connection and use as recommended in the FCC Registration Section below. CH224ATF The entire host product must be submitted to the country of interest’s Telephone Network approval authority. They are available on special order. The end product supplier is responsible for submission of the end product for independent testing and subsequent approval. See Application Cermetek Note #142 for typical telephone requirements. CH224ATF HANDLING AND ASSEMBLY RECOMMENDATIONS The CH224ATF contains static-sensitive compo-nents and should only be handled by personnel and in areas that are properly protected against static discharge. INTERNATIONAL APPROVALS The CH224ATF can be approved for some international telephone connections. This must be done after the modem is installed in the host product. 12 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY FCC REGISTRATION All products in the CH224ATF series are registered with the FCC (Federal Communications Commission) under Part 68. To maintain the validity of the registration, you must serve notice to the end user of the product of several restrictions the FCC places on the modem and its use. The CH224ATF requires external surge protection (see Figure 7) This is mandatory to maintain FCC Part 68 conveyed approval.. Refer to Cermetek Application Note #126 for more details. In addition to restriction notification, the FCC requires that Cermetek make all repairs to all products in the CH224ATF. If repairs are necessary after installation of the CH224ATF in the end product and the end product has been delivered to the end user, the end product must be returned to the end product supplier where the CH224ATF can be removed and then forwarded to Cermetek for repair. The following notice is recommended and should be included in the end product ’s user manual. CH224ATF comply with the mechanical requirements specified in Part 68, Sub-part F, specifically the dimensions, tolerances and metallic plating requirements. The compliance of these connectors will be assured by purchase specifications and incoming inspection. Documentation of such specifications and/or inspections will be provided to the FCC within 30 days of their request for the same. Telephone Company Procedures: The goal of the telephone company is to provide you with the best service it can. In order to do this , it may occasionally be necessary for them to make changes in their equipment, operations or procedures. If these changes might affect your service or the operation of your equipment, the telephone company will give you notice, in writing, to allow you to make any changes necessary to maintain uninterrupted service. In certain circumstances, it may be necessary for the telephone company to request information from you concerning the equipment which you have connected to your telephone line. Upon request of the telephone company, provide the FCC registration number and the ringer equivalence number (REN); both of these items are listed on the equipment label. The sum of all of the 13 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99) PRELIMINARY CH224ATF FOR YOUR USER ’S MANUAL The Part 68 rules require the following (or equivalent) be provided to the end user of equipment containing a DAA: REN ’s on your telephone lines should be less than five in order to assure proper service from the telephone company. In some cases, a sum of five may not be useable on a given line. Consult your telephone provider. Type of Service: The (insert end product name)is designed to be used on standard device telephone lines. It connects to the telephone line by means of a standard jack called the USOC RJ-11C (or USOC RJ45S). Connection to telephone-company-pro-vided coin service (central office implemented systems) is prohibited. Connection to party lines service is subject to state tariffs. If Problems Arise: If any of your telephone equipment is not operating properly, you should immediately remove it from your telephone line, as it may cause harm to the telephone network. If the telephone company notes a problem, they may temporarily discontinue service. When practical, they will notify you in advance of this disconnection. If advance notice is not feasible, you will be notified as soon as possible. Changes in Attestation Procedure for Plugs and Jacks: (Name of applicant) attests that the network interface plugs or jacks used on this equipment comply with and will continue to telephone provider. Cermetek reserves the right to make changes in specifications at any time and without notice. The information furnished by Cermetek in this publication is believed to be accurate and reliable. However, no responsibility is assumed by Cermetek for its use, or for any infringements of patents or other rights of third parties resulting from its use. No license is granted under any patents or patent rights of Cermetek. Printed in U.S.A 406 TASMAN DRIVE | SUNNYVALE CA 94089 | LOCAL: 408-752-5000 | TOLL FREE: 1-800-8826271 | FAX: 408-752-5004 | WEB SITE: http://www.cermetek.com | EMAIL: [email protected] 14 1999 Cermetek Microelectronics, Inc. Document No. 607-0005 Rev.A (11/99)