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Motorola ME-560M Скачать руководство пользователя страница 24

Table 2.13

Fax commands

Fax Class 1 Commands

Description

+FCLASS=n - Select Service Class

0=data mode*
1=fax class 1

+FCLASS?

Query current

+FCLASS=?

Query range shows 0,1

+FTS=n - Stop Transmission and Wait

0-255 (x 10 ms)

+FRS=n - Receive Silence

0-255 (x 10 ms)

+FTM=n - Transmit Data

24=V.27ter 2400 bps
48=V.27ter 4800 bps
72=V.29 7200 bps
73=V.17 7200 bps long
74=V.17 7200 bps short
96=V.29 9600 bps
97=V.17 9600 bps long
98=V.17 9600 bps short
121=V.17 12000 bps long
122=V.17 12000 bps short
145=V.17 14400 bps long
146=V.17 14400 bps short

+FTM=?

Query range shows 24,48,72,73,74,96,97,98,121,122,145,146

Table 2.13

Fax commands

Fax Class 1 Commands

Description

+FRM=n - Receive Data

24=V.27ter 2400 bps
48=V.27ter 4800 bps
72=V.29 7200 bps
73=V.17 7200 bps long
74=V.17 7200 bps short
96=V.29 9600 bps
97=V.17 9600 bps long
98=V.17 9600 bps short
121=V.17 12000 bps long
122=V.17 12000 bps short
145=V.17 14400 bps long
146=V.17 14400 bps short

+FRM=?

Query range shows 24,48,72,73,74,96,97,98,121,122,145,146

+FTH=n - Transmit Data with HDLC Framing

3=V.21 300 bps
24=V.27ter 2400 bps
48=V.27ter 4800 bps
72=V.29 7200 bps
73=V.17 7200 bps long
74=V.17 7200 bps short
96=V.29 9600 bps
97=V.17 9600 bps long
98=V.17 9600 bps short
121=V.17 12000 bps long
122=V.17 12000 bps short
145=V.17 14400 bps long
146=V.17 14400 bps short
Note: all HDLC modes internally clip to V.21

+FTH=?

Query range shows 3.

+FRH=n - Receive Data with HDLC Framing

3=V.21 300 bps
24=V.27ter 2400 bps

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Содержание ME-560M

Страница 1: ...USER S MANUAL For Motorola 56K V90 External Data Fax Voice Modem ...

Страница 2: ...Commands Preceded by 2 3 Dial Modifiers 2 4 Commands Not Preceded By AT 2 5 Result Codes 3 S REGISTER REFERENCE 3 1 Register Summary 3 2 Glossary of the S Registers 4 TESTING 4 1 Local Analog Loopback 4 2 Local Analog Loopback with Self Test 5 TROUBLESHOOTING GUIDE 6 APPLICATION EXAMPLES 6 1 Dialing a Remote Modem 6 2 Dial a Stored Number 6 3 Manual Answer an Incoming Call 6 4 Auto Answer an Incom...

Страница 3: ...B TECHNICAL SPECIFICATIONS D QUICK REFERENCE E GLOSSARY F ASCII CODE TABLE G Approximately Power Consumption ...

Страница 4: ...s 2 4 Kbps ITU T V 23 1 2 Kbps 75 bps ITU T V22 1 2 Kbps ITU T V 21 300 bps Bell 212A 1 2 Kbps Bell 103 300 bps Automatic Mode Selection Automatic Rate Adaption Digital Near End Far End Echo Cancellation ITU T V 8 Signaling ITU T V 8bis Signaling ITU T V 54 Loopback Test support ITU T V 42 MNP 2 4 Error Correction ITU T V 42 MNP5 Data Compression Auto baud DTE Rate 230 4 Kbps Maximum Hayes AT Comm...

Страница 5: ... A host computer system should with a high speed RS 232 serial port capability of supporting 115200 BPS is a highly recommendation Fully data fax voice functionality is only supported on system using a Intel 368 processor or higher or equivalent LED Indicator Specification There are several LED light show in front of modem while the modem be powered on And each light would indicate the difference ...

Страница 6: ...ide of the cable into the serial port ie RS 232 on the back of the computer the terminal or other devices Then you might tighten the screws Connecting to the telephone line To connect your modem to the telephone line 1 Unplug your telephone from the wall jack by pressing the protruding tab toward the plastic connector and removing the connector from the wall jack 2 Take the telephone cord that was...

Страница 7: ...ling your modem on PC We suggest you to use PNP Plug and Play start up That would be more easy to you First of all TURN ON the POWER SWITCH in the rear of modem The PWR LED will lights up Start up Modem with PNP A Power up or reboot your PC Waiting for Windows 95 98 boot up and Windows95 98 would find your new modem by automatically Then it will stop while the modem was found and a dialog box appe...

Страница 8: ...hich we inserted Then pick a file named 3450RDK INF Select Motorola MC143450RDK for the model of modem Now click the Next Then the Windows 95 98 will copy some related date into the system by automatic And next screen changes to the one shown in following figure 1 4 Click on Next D After the modem is installed in your computer system reboot the computer system and waiting for it started ...

Страница 9: ...dard modem was found cause of she could not recognize the name of manufacture So we must Change the name for modem Click on the CHANGE button C Point to the disk which we have prepared Then pick a file named 3450RDK INF Select Motorola MC143450RDK for the model of modem Now click the Next Then Windows 95 98 will copy some related date into the system by automatic D After the modem is installed in ...

Страница 10: ...modem installation as shown in Figure 1 6 blow 5 Choose OK to leave this window Command response is currently preliminary and is always subject to change per upgrade An ERROR message or other information is acceptable for some of I commands Be sure to write down the COM port number so you can enter it in your selected applications software later This process verifies that your modem is now operati...

Страница 11: ...rect interaction you will have with your fax modem For example your communications software may have menus and commands that let you dial and answer calls If your communication software includes fax capabilities you can also use it to send faxes to and receive them from fax machines and fax modem The manual that came with your communications software should describe how to perform these data and f...

Страница 12: ...r AT commands to perform your tasks Otherwise you will not be able to exchange data You may want to talk with the person at the remote device to make sure that the remote modem or modem is using the same number of start bits data bits parity bit and stop bit s as your modem The manual that came with you communication software should describe how to change these settings Facsimile machines are amor...

Страница 13: ...he AT prefix the command line cannot be executed Once entered AT cannot be deleted with the Backspace or Delete key More than one command can be placed on a single line and if desired separated with spaces for readability Once the carriage return Enter key is pressed the command line is executed A line with no carriage return is ignored The modem accepts either upper or lower case characters in th...

Страница 14: ...register AT Read Selected S register AT Read Selected S register A Answer A Answer Bn CCITT or Bell 0 Responds with OK but does nothing 1 Responds with OK but does nothing Cn Carrier Control 1 Responds with OK but does nothing Dn Dial dial modifiers 0 1 2 3 4 5 6 7 8 9 A B C D Dial digits L redial last number Responds with Error if ATDL is issued but if L is embedded in the dial string it is consi...

Страница 15: ... From 0 to 95 T Set Tone Dial default tone dial Vn Result Code Form 0 short form 1 long form Wn Connect Message Control 0 upon connection modem reports only the DTE speed 1 upon connection modem reports error correction protocol and DTE speed 2 upon connection modem reports DCE speed Note that the connect message response is a function of Wn Xn and Vn See Table 3 24 for detail Xn Extended Result C...

Страница 16: ...ng Mn Async Sync Mode Selection 0 async Else responds with Error Pn Select Pulse Dial Make Break ratio 0 to 9 Responds with OK but does nothing Qn Sync Async Mode This is an extension of the Mn command 0 Responds with OK Else responds with Error Table 2 2 AT commands AT Commands Description Rn RTS CTS Option Under Async 0 CTS normal 1 CTS always on Sn DSR Override 0 DSR always on 1 DSR normal on i...

Страница 17: ...hex numbers same 8 hex numbers Set Plug and Play Serial Number 8 3 ascii chars 4 hex numbers same 3 ascii chars same 4 hex numbers Set Plug and Play Vendor ID and Product Number Display stored PnP serial number e g 00000000 as factory default Table 2 4 AT commands AT Commands Description Gn DCE DCE XON XOFF flow control 0 disable 1 enable Kn Break Control controls the response of the modem to a br...

Страница 18: ...ps 7200 7200 bps 9600 9600 bps 12000 12000 bps 14400 14400 bps 16800 16800 bps 19200 19200 bps 21600 21600 bps 24000 24000 bps 26400 26400 bps 28800 28800 bps 31200 31200 bps 32000 32000 bps 33600 33600 bps 34000 34000 bps 36000 36000 bps 38000 38000 bps 40000 40000 bps 42000 42000 bps 44000 44000 bps 46000 46000 bps 48000 48000 bps 50000 50000 bps 52000 52000 bps 54000 54000 bps 56000 56000 bps 5...

Страница 19: ...60000 60000 bps x_law 0 u law 1 A law rb_signaling 0 Responds with OK but does nothing 1 Responds with OK but does nothing Table 2 5 AT MS command AT MS Commands Description MS Query current e g MS 56 1 300 60000 60000 0 0 MS Query range shows MS 0 1 2 3 9 10 11 56 64 69 0 1 300 60000 300 60000 0 1 0 1 Table 2 6 AT A8 Commands V 8bis Requirements AT A8 Commands V 8bis Requirements A8E v8o v8a v8cf...

Страница 20: ...st message 2nd message sig_en msg_en supp_delay signal no default value 0 none 1 Initiate MRe 2 Initiate MRd 3 Initiate CRe low power 4 Initiate CRe high power 5 Initiate CRd 6 Initiate ESi 7 Responding MRd low power 8 Responding MRd high power 9 Responding CRd 10 Responding ESr This parameter is required Issue ERROR if missing 1st message and 2nd message These parameters contain octets for the V ...

Страница 21: ...ble 0 the ring cadence is not reported all ring cadences are reported as RING event codes If enable 1 and report 0 the ring cadence is reported with DRON and DROF messages no RING event codes are reported If enable 1 and report 0 the ring cadence is reported with DRON and DROF messages RING event codes are reported report 10 seconds after the falling edge of a ring cycle VDR Query current VDR Quer...

Страница 22: ...rig_fbk ans_fbk Synchronous Access Mode orig_rqst 1 Initiate call with buffered mode only 2 Initiate V 42 without detection phase If V 8 is in use this is a request to disable V 42 detection phase 3 Initiate V 42 with detection phase 4 Initiate alternative protocol 6 Initiate Sync Access Mode when connection is completed and data state is entered orig_fbk 0 Error control optional either LAPM or Al...

Страница 23: ...quence on idle framed_idle 0 in framed sub mode modem transmits HDLC flags on idle framed_un_ov 0 in framed sub mode modem transmits abort on underrun in middle of frame 1 in framed sub mode DCE transmits a flag on underrun in middle of frame and notifies DTE of underrun or overrun hd_auto 0 V 34 switching in half duplex operation with no additional procedures crc_type 0 crc generation and checkin...

Страница 24: ...ss 1 Commands Description FRM n Receive Data 24 V 27ter 2400 bps 48 V 27ter 4800 bps 72 V 29 7200 bps 73 V 17 7200 bps long 74 V 17 7200 bps short 96 V 29 9600 bps 97 V 17 9600 bps long 98 V 17 9600 bps short 121 V 17 12000 bps long 122 V 17 12000 bps short 145 V 17 14400 bps long 146 V 17 14400 bps short FRM Query range shows 24 48 72 73 74 96 97 98 121 122 145 146 FTH n Transmit Data with HDLC F...

Страница 25: ... q Quiet dle s Silence dle t Hook transition onhook to offhook dle u Underrun dle T Timing mark dle etx End of stream Shielded dle Voice Audio Commands from DTE Description dle p Pause dle r Resume dle E Purge DCE buffer dle u Increment playback volume dle d Decrement playback volume dle can Cancel dle eot Voice bytes buffered query dle etx Terminate Voice Audio commands Description A Answering in...

Страница 26: ... current VBS Query range shows 2 3 4 8 VBT n Beep Tone Timer 0 to 40 default 10 x 0 1s VBT Query current VBT Query range shows 0 40 VCI Identify Compression Method Return identifier string Responds with MOTOROLA ADPCM VLS n Voice Line Select 0 telephone line with telephone handset 1 tx rx device other than telephone line e g handset or speakerphone powered by modem 2 tx only device e g onboard spe...

Страница 27: ...ts associated with in voice tx j bits associated with voice rx k bits associated with in online voice command bit value 0 disable 1 enable bit0 dis enab DTMF tone bit1 dis enab 1300 Hz calling tone bit2 dis enab 1100 Hz calling tone bit3 dis enab 2100 Hz answer tone bit4 dis enab 2225 Hz answer tone bit5 dis enab call progress tone bit6 reserved bit7 reserved VTD Query current VTD Query range show...

Страница 28: ... Query range shows 0 1 0 1 VEQ w x y z Graphical Equalizer Not implemented For future use only w mute parameter 0 mute on 1 mute off x device parameter 0 speaker 1 microphone y band parameter 0 band 0 1 band 1 2 band 2 3 band 3 4 band 4 z level parameter 0 16 dB attenuation 1 14 dB attenuation 2 12 dB attenuation 8 0 dB attenuation 15 14 dB attenuation VEQ Query current VEQ Query range shows 0 1 0...

Страница 29: ...a DSP56303 0 9BCD2D5C 9 00000000 OK Table 2 17 AT HO Homologation support commands Command syntax AT HO option 0 option 1 option 2 option 3 CR Strap Settings Option 0 Option 1 Option2 Option 3 Normal 0 V 21 1 tx level 0 to 30 for 0 to 30 dB 0 ans 1 orig 0 mark 1 space 2 511 pattern Bell 103 2 tx level 0 to 30 for 0 to 30 dB 0 ans 1 orig 0 mark 1 space 2 511 pattern V 23 3 tx level 0 to 30 for 0 to...

Страница 30: ... in the figure below there are two forms for each result code Modem Response code and digit code Response Code Description Digital Code OK Command executed without errors 0 CONNECT Connected to an another modem 1 RING Detected a coming ring 2 NO CARRIER Carrier lost or without connect 3 ERROR Invalid command or invalid character 4 CONNECT 1200 Connection established on 1200 bps 5 NO DIALTONE Do no...

Страница 31: ...nnection established on 44000 bps 171 CONNECT 46000 Connection established on 46000 bps 172 CONNECT 48000 Connection established on 48000 bps 173 CONNECT 50000 Connection established on 50000 bps 174 CONNECT 52000 Connection established on 52000 bps 175 CONNECT 54000 Connection established on 54000 bps 176 CONNECT 56000 Connection established on 56000 bps 177 CONNECT 58000 Connection established o...

Страница 32: ...50 255 default 80 x 0 001s S12 Escape Prompt Delay Range 0 255 default 50 x 0 02s S13 Reserved Responds with OK S14 General Bit Mapped Options Responds with OK S15 Reserved Responds with OK S16 Test Mode Bit Mapped Options Responds with OK S17 Reserved Responds with OK S18 Test Timer Responds with OK S19 AutoSync Options Responds with OK S20 AutoSync HDLC Address or BSC Sync Char Responds with OK ...

Страница 33: ...mit Attenuation Level Range 9 30 default 10 x 1 dBm S92 Fax Transmit Attenuation Level Responds with OK S95 Result Code Messages Control Responds with OK S Registers Voice mode specific S Register for Voice Operation Motorola S30 Disconnect Inactivity Timer Range 0 255 default 0 x 1s 3 2 Glossary of S Registers S0 Number of Rings Before Auto Answer S0 determines the number of rings that must be re...

Страница 34: ...he line feed When disabled the line feed character that precedes or follows a result code is canceled Pertains to asynchronous operation only Range 0 127 ASCII decimal Default 10 Line Feed S5 ASCII Value of Backspace Character S5 stores the ASCII value of the backspace character The backspace is used to edit a command line If your computer does not recognize the default as a backspace change the v...

Страница 35: ...onfirm it The longer the response time the easier it is for the modem to correctly recognize a carrier without mistaking other signals or transient noise on the line as a carrier Range 1 255 tenths of a second Default 6 0 6 second S10 Delay between Loss of Carrier and Hang Up S10 determines the delay time between the loss of a carrier from the remote modem and hang up This allows for a temporary l...

Страница 36: ...ossible to return the modem to command state Range 0 255 1 50 of a second Default 50 1 second S13 Reserved S14 Bit Mapped Options Reserved S15 Reserved S17 Reserved S18 Test Timer The test timer determines how long tests are performed The modem automatically ends the test when the test time is expired The default value of 000 disables the test timer When the timer is thus disabled all tests must b...

Страница 37: ... than the value held in S25 is ignored by the modem while it is in data mode Range 0 255 1 second for synchronous mode 1 0 01 second otherwise Default 5 S26 RTS to CTS Delay Interval Pertains to synchronous operation only When CTS tracks RTS R0 and the modem detects an ON to OFF transition on RTS this register sets the time delay before the modem turns CTS to ON Range 0 255 hundredths of a second ...

Страница 38: ...ects If you set S38 between 0 and 254 the modem waits that number of seconds for the remote modem to acknowledge all data before it disconnects If you set S38 to 255 the modem waits indefinitely for the remote modem to acknowledge all data Range 0 255 seconds Default 20 S39 Flow Control Default 3 00000011b S40 General Bit Mapped Options Default 104 68h 01101000b S41 Bit Mapped Options Reserved S46...

Страница 39: ...dBm Range 9 to 30 dBm x 2 Corresponding to 0 to 15 dBm transmit level Default 10 10 dBm transmit level S92 Fax Transmit Attenuation Level Sets the transmit attenuation level from 0 to 15 dBm for the fax mode resulting in a transmit level from 0 to 15 dBm Range 0 to 15 dBm Corresponding to 0 to 15 dBm transmit level Default 10 10dBm transmit level S95 Extended Result Codes This register can overrid...

Страница 40: ... computer or terminal back to the same computer or terminal as shown in Figure 4 1 During the test data is not transmitted to the remote modem If characters are looped correctly during this test both the modem and the local computer or terminal are functioning correctly If incorrect characters appear on the screen either the local computer or terminal or the local modem is in error To perform a lo...

Страница 41: ...test ends and the test result is reported Example 2 test timer enabled Command AT Q0 CR ATS18 60 T1 CR Result CONNECT 56000 Test message THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 1234567890 Escape Result code OK 4 2 Local Analog Loopback with Self Test The local analog loopback with self test checks the integrity of the local modem In this test an internally generated data pattern of alternate b...

Страница 42: ...Command AT T0 CR ends the test Test result 000 Result code OK ...

Страница 43: ...odem Does Not Dial Out To make sure that your modem responds normally as described in section 4 1 If you can communicate through the keyboard check whether the modem is properly connected to the phone line Or a situation be similar to the following case Software respond No Dialtone mean that the modem do not detect line dial tone Sol So first of all to make sure the LINE has been plug into the LIN...

Страница 44: ...e S register S0 is S0 0 This condition disables the auto answer capability so that you must issue an ATA command to answer a call At power up your modem always monitors if there are incoming rings If incoming rings are detected your modem will display result codes on the screen as RING RING Seeing that you may issue the ATA command to answer the call This command must be entered within the quiet i...

Страница 45: ...nication with the remote modem 6 6 Display Format When command AT V is issued the modem responds with Active profile Stored profile 0 and Stored profile 1 as follows Columns Line up 0 1 2 3 4 5 6 7 01234567890123456789012345678901234567890123456789012345678901234567890123456789 Active profile Stored profile 0 Stored profile 1 OK When command AT V1 is issued the modem responds with the last connect...

Страница 46: ...0 C3 S00 000 S02 043 S06 002 S07 050 S08 002 S10 014 S12 050 S30 000 S32 017 S33 019 Factory Default 1 STORED PROFILE 1 DTE SPEED 115200 BPS 8N1 E1 L1 M1 N1 Q0 T V1 W0 X4 C0 D0 G2 K3 Q5 R1 S0 T4 X0 K5 N0 V0 C3 S00 000 S02 043 S06 002 S07 050 S08 002 S10 014 S12 050 S30 000 S32 017 S33 019 Forbidden Delayed numbers display Display Forbidden Numbers V3 FORBIDDEN NUMBERS 0 0123456789 1 12345678901234...

Страница 47: ...is displayed otherwise a CONNECT together with a speed is displayed Notes a x Don care b Deafult is V0 W0 and X4 V W X CON NECT DTE speed Modulat ion Pro tocol Com Pression DCE speed V0 W0 X4 V0 W1 X4 V0 W2 X4 V1 x x V1 x x V1 x x V0 W0 X0 V0 W1 X0 V0 W2 X0 V0 W0 X1 V0 W1 X1 V0 W2 X1 V0 W0 X2 V0 W1 X2 V0 W2 X2 V0 W0 X3 V0 W1 X3 V0 W2 X3 Assuming result code return is enabled ATQ0 Assuming long for...

Страница 48: ...W V 23 connection with no protocol established CONNECT 115200 NONE 75 TX 1200 RX 2a AT V0W0X4 V 34 connection with LAPM protocol and V 42bis data compression established CONNECT 115200 2b AT V0W0X0 V 34 connection with LAPM protocol and V 42bis data compression established CONNECT 3a AT V0W1X4 K56Flex connection with LAPM protocol and V 42bis data compression established PROTOCOL LAPM CONNECT 1152...

Страница 49: ...ually refers to a query of current setting e g MS MS 11 1 300 33600 0 0 Usually refers to a query of range of setting e g MS MS 0 1 2 3 9 10 11 56 64 69 0 1 300 60000 300 60000 0 1 0 1 APPENDIX A CALLER ID COMMANDS CIDn Caller ID Enables or disables Caller ID for U S A This command only apply to models which support the Caller ID function CID 0 Disables Caller ID Default CID 1 Enables Caller ID wi...

Страница 50: ...has requested private service and where O indicates that the calling number information is not available or out of service at the calling location NAME NAME listing name where listing name is the subscription name MESG MESG data tag length of message data checksum in printable ASII hex numbers This tag indicates a data item not listed above The message is only possible for Multiple Message Format ...

Страница 51: ...S C 1 Other Features Data Rates bps K56flex 300 1200 2400 4800 7200 9600 12000 14400 19200 21600 24000 26400 28800 31200 32000 33600 34000 36000 38000 40000 42000 44000 46000 48000 50000 52000 54000 56000 V 90 56000 54667 53333 52000 50667 49333 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 Receive only Flow Control Xon Xoff Hardware RTS CTS Operation Fu...

Страница 52: ......

Страница 53: ...Nn Automode Enable On Return to On line Data Mode P Set Pulse Dial as Default Q Result Code Display Sn Reading and Writing to S Registers T Set Tone Dial as Default Vn Select Word or Digit Result Codes Wn Negotiation Progress Reporting Xn Extended Result Codes Yn Enables or Disables Long Space Disconnect Zn Reset Cn Select DCD Options Dn DTR Option F Fetch Factory Configuration Gn Set Guard Tone K...

Страница 54: ... Transmit Break to Remote Gn Modem to Modem Flow Control XON XOFF Kn Break Control Nn Operating Mode Control Vn Single Line Connect Message Enable Cn Enable Disable Data Compression En Enable Disable Line Quality Monitor and Auto Retrain or Fallback Fall Forward L Report Received Signal Level Q Line Signal Quality MS Select Modulation Download to Flash Memory For models with flash Memory only Answ...

Страница 55: ...ng the modem continues to dial regardless of the existence of a dialtone ring or busy signal BPS Bits Per Second the number of bits that can be transmitted in one second Carrier Signal The analog data signal that a modem sends over telephphone wires COMx Where x 1 2 3 or 4 COMx is the name address of serial communications ports on personal computers Each serial port in a personal computer has a di...

Страница 56: ...e modem Data can be sent or received from the remote modem in this state No commands will be accepted from the modem except the escape command which will bring the modem into the on line command state On Line Command State A modem state in which the modem can accept or execute commands from an asynchronous computer or terminal while remaining connected with the remote modem The user can return the...

Страница 57: ...4 2C 076 4C L 108 6C l 013 0D CR 045 2D 077 4D M 109 6D m 014 0E SO 046 2E 078 4E N 110 6E n 015 0F SI 047 2F 079 4F O 111 6F o 016 10 DLE 048 30 0 080 50 P 112 70 p 017 11 DC1 049 31 1 081 51 Q 113 71 q 018 12 DC2 050 32 2 082 52 R 114 72 r 019 13 DC3 051 33 3 083 53 S 115 73 s 020 14 DC4 052 34 4 084 54 T 116 74 t 021 15 NAK 053 35 5 085 55 U 117 75 u 022 16 SYN 054 36 6 086 56 V 118 76 v 023 17...

Страница 58: ... Switched telephone Network PSTN However due to differences between the individual PSTNs provided in different countries the approval does not of itself give an unconditional assurance of successful operation on every PSTN termination point In the event of problems you sholud contact your equipment supplier in the first instance ...

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