Toshiba V.90 manuale d’uso

V .90 56K Internal Modem User’ s Guide TOSHIBA C500-0601M2[...]

ii FCC Notice “Declaration of Conformity Information” This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to P art 15 of th e FCC rules. These limit s are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and [...]

iii Industr y Canada Requirement This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conformé à la norme NMB-003 du Canada. Pursuant to FCC CFR 47, Part 68: When you are ready to install or us e the modem, call you r local telephone company and gi ve them th e following information: ❖ The t[...]

iv If problems arise If any of your telephone equipm ent 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, the y may temporarily discontinue service. When pract ical, they will notify you in advance of this disconnection. If[...]

v The customer should be aware that compliance with the abo ve conditions may not prev ent degradation of servi ce in some situations. Repairs to certified equipment should be coordinated by a representati ve designated by the supplier . Any repairs or alterations made by the user to this equipment, or equipmen t malfunctions, may giv e the telecom[...]

vi Export Administration Regulation This document contains technical data that may be controlled under the U.S. Export Administration Regulations, and ma y be subject to the approv al of the U.S. Department of Commerce prior to export. Any export, directly or indirectly , in contrav ention of the U.S. Export Ad ministration Regulations is prohibite[...]

vii Contents V .90 56K Internal Modem User’ s Guide .............................. ............................... ..................... i Contents..................... ........................................................ ........ vii Introduction ................ ........................................................ ........ xii Chapter 1[...]

viii Direct access line ................................................................ 8 Extension line ...................................................................... 8 Receiving a call.................................................................... 9 T erminating a call ................................................................[...]

ix &Gn V .22bis guard tone control...................................... 26 &Kn Local flow control selection .................................... 27 &Pn Select Pulse Dial Make/Break Ra tio ....................... 27 &Tn Self-test commands ................................................. 28 &V View active configuratio n and stor[...]

x S38 K56flex Dial line rate .................................................. 45 S38 56K Downstream Rate ............................................. 45 A T command set result codes ............................................. 46 Chapter 5: MNP and V .42.... ......................... ............................ 52 Error -correction ov erview .[...]

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Function charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv[...]

xii Introduction Congratulations on becoming the owner of a V .90 56K compliant internal modem offering adv anced functions for fax and data communication. This user’ s guide provides detailed information on features, operation and technical specifications of your internal modem. The V .90 56K internal modem provides capability for f acsimile tra[...]

xiii Some phone lines will not support V .90 56K connections at all, either because of quality impair ments or additional digital-to- analog con versions (i.e., PBX systems). The modem uses the V .34 protocol for “upstream” data transmission, which supports connection rates of up to 33,600 bits/second. NOTE: 56K rates can be achieved only when [...]

xiv Standard commands The internal modem is compatib le with the industry standard Hayes ® A T commands and S-Re gister settings. Error control This feature assures accurate data transmission e ven over telephone lines subject to noise interference. The internal modem uses Microcom Networking Protocol ® 4 (MNP ® 4) and V .42 error correction. Da[...]

xv Function charts The chart below lists the internal modem’ s supported communication protocols: Functions available in al l operating systems Function Remarks Data V .90 From 32 Kbps to 56 Kbps V .34 From 2400 bps to 33.6 Kbps V .32bis 4800, 7200, 9600 bps, 12, 14.4 Kbps V .32 480 0, 9600 bps V .22bis 1200, 2400 bp s V .22 120 0 bps V .23 75, 6[...]

xvi User’ s guide contents This user’ s guide is composed of six chapters, plus an Introduction, two appendixes, a glossary , and an index. ❖ The Introduction describes the f unctions and capabilities of the internal modem. ❖ Chapter 1, Setup, describes how to set up and configure the internal modem and provides information on checking mode[...]

xvii ❖ Chapter 6, T est Function, describes how to conduct the loopback test. ❖ The Appendixes provide technical information. ❖ The Glossary def ines telecommunications terminology . ❖ The Index quickly directs you to information contained in the user’ s guide. Conventions This user’ s guide uses the following formats to describe, ident[...]

xviii Display Messages Messages are used in this us er’ s gu ide to bring important information to your attention. Each type of message is identif ied as shown below . CAUTION: Pay attention! A caution informs you that improper use of equipment or fa ilure to follow in structio ns may cause data loss or damage your equipment. NOTE: Please read. A[...]

Chapter 1 Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2[...]

1 Setup This chapter describes how to set up your hardware and ho w to check the internal modem’ s functi ons. It is written primarily for users who, for some reason, need to set up the modem again. Some procedures may v ary slightly for users who have a preinstalled modem. Hardware Setup Use the MS-DOS ® or TSETUP program to set the COM port, I[...]

Setup Function chec k 2 NOTE: HWSETUP in Windows does not enable changes to ports. Function check Use the Diagnostic function accessi ble in the Modems Properties window to check the functions of your internal modem. T o run the diagnostics: 1 Click the Diagnostics tab in the Modems Properties window . Modem Pr operties window 2 Select the COM P or[...]

Setup Function chec k 3 3 Click More Info . . . . The system ex ecutes an automatic operati ons test. If the test does not run or if an error message appears, repeat the setup procedures. Diagnostics tab Mor e Info... window[...]

Chapter 2 Connection procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7[...]

5 Using the Internal Modem This chapter describes conn ection procedures and basic operations. Connection procedures This section describes how to connect the internal modem to, and disconnect it from, a telephone jack. CAUTION: The modem is designed for use with a standard analog telephon e line. Do not conn ect the modem to a digital telephone li[...]

Using the Internal Modem Connection pr ocedur es 6 ❖ If a (working) telephone connected to the wall jack has an REN (Ringer Equi valenc y Number) printed on its label, then it is an analog phone. If the phone is working correctly , then the wall jack itself is analog. ❖ T elephones in an off ice en vironment are commonly connected to digital ph[...]

Using the Intern al Modem Basic operation 7 NOTE: When you connect the RJ11 jack, insert it until you hear a click. Disconnecting the internal modem When you need to disconnect the internal modem’ s modular cable for transporting the computer or for some other reason: 1 Pinch the connecting lev er on the connector in the telephone wall jack and p[...]

Using the Internal Modem Basic operation 8 Connecting to a telephone line The A T commands for connecting to a telephone line depend on whether you are using a direct line or an extension line, such as in an of fice b uilding. Direct access line ❖ T o place a call using tone dialing, enter: AT D T ****** * and press Enter . The asterisks * indica[...]

Using the Intern al Modem Basic operation 9 Y ou can enter as many commas as you need. The follo wing example will result in a six-second pause: AT D T 9 , ******* and press Enter . NOTE: If you are using a PBX connection that does not wait for a dial tone, add the X0, X1 or X3 to the A T command line. For example: AT X 3 D P 9 , ******* and pr ess[...]

Using the Internal Modem Basic operation 10 Setting the data flow control Data flow control is used to start and stop data transmission according to the status of the da ta buf fer (full or empty). The follow ing describes how to set the data flow control method: ❖ CTS/R TS (hardware control) ❖ XON/XOFF (software) Also, see “MNP and V .42” [...]

Using the Intern al Modem Basic operation 11 Facsimiles Fax communication uses EIA-578 Class 1 commands and requires fax software. Communication is controll ed by the fax software. NOTE: Use only software compa tible with EIA-578 Class 1. Do not use EIA-592 Class 2-compatible software.[...]

Chapter 3 A T command formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13[...]

13 A T Commands In most cases, you will not need to type A T commands manually . Ho wev er , there may be some oc cas ions when you will need to do so. This chapter describes A T commands for data mode. Fax commands are taken care of by application software. A T command formats The format for entering A T commands is: AT X n where X is the A T comm[...]

A T Commands A T command formats 14 +++ Escape sequence The escape sequence allo ws the modem to exit data mode and enter online command mode . While in online command mode, you can communicate directly with your modem using A T commands. When you finish, you can return to data mode using the A TO command. There must be a pause, the length of which[...]

A T Commands A T command formats 15 Result Codes: : Dn Dial This command instructs the mo dem to dial a telephone number . Enter n (the telephone number and any modifiers) after the A TD command. Any digit or symbol (0-9, *, #, A, B, C, D) may be dialed as touch- tone digits. Characters such as spaces, hyphens, and parentheses do not count. They ar[...]

A T Commands A T command formats 16 En Echo command This command controls whether or not the characters entered from your computer ke yboard are displayed on your monitor (echoed) while the modem is in command mode. . Result Codes: Hn Hook control This command instructs the modem to go on-hook to disconnect a call, or of f-hook to make the phone li[...]

A T Commands A T command formats 17 Result Codes: In Request ID information This command displays product information about the modem. OK n=0,1 ERR OR Otherwise I0 Returns modem identity string and driv er version number , same as 13. I1 Calculates R OM checksum and displays it on the DTE. I2 Performs a R OM check and calculates and verifies the ch[...]

A T Commands A T command formats 18 The A TI11 command may be issued from online command mode or after the end of a call. After a call, some of the values are no longer v alid; it’ s useful to kno w which ones. Each of the line items in the A TI11 results are defined as follo ws: 1 V .90, V .34, or V .32 depending on the type of connection negoti[...]

A T Commands A T command formats 19 6 LAPM or MNP or None, de pending on V .42 negotiation. 7 V42bis or MNP or None, depending on V .42 negotiation. 8 Mean-square error of recei ved do wnstream signal. This is a dimensionless decimal number , only v alid during a call. Higher numbers are worse. Ther e’ s no absolute threshold of good reception; i[...]

A T Commands A T command formats 20 2 = No answer , b usy , etc. 3 = T raining failure V .90, 56K or V .34 4 = Protocol failure if required b y N4, for example. 21 For PCM connection only , a hexi decimal 6-bit pattern of T1 frames with robbed-bit signaling. 22 For PCM connection only , the downstream digital loss. Result Codes: Ln Monitor speaker[...]

A T Commands A T command formats 21 Result Codes: Nn Modulation handshake This command controls whether or not the local modem performs a negotiated handshak e at con nection time with the remote modem when the communication speed of the two modems is dif ferent. Result Codes: On Return online to data mode M2 The sp eaker is alw ays on when modem i[...]

A T Commands A T command formats 22 Result Codes: P Select pulse dialing This command configures the m odem for pulse (non-touch-tone) dialing. Dialed digits are pulsed until a T command or dial modifier is rece iv ed. T one dial is the default setting. Qn Result code control Result codes are informational messages sent from the modem and displayed[...]

A T Commands A T command formats 23 Vn DCE response format This command controls whether resu lt codes (including call progress and negotiation progress messages) are displayed as words or their numeric equiv alents. Result Codes: Wn Result Code Option Result Codes: Xn Result code selection, call progress monitoring This command sets detection opt [...]

A T Commands A T command formats 24 Extended result codes Dial tone detect Busy tone detect Command Extended Result code Dial tone Detect Busy signal Detect X0 Disable Disable Disable X1 Enable Disable Disable X2 Enable Enable Disable X3 Enable Disable Enable X4 (default) Enable Enable Enable X5 Enable Enable Enable X6 Enable Enable Enable X7 Disab[...]

A T Commands A T command formats 25 Zn Recall stored profile The modem performs a soft reset and restores (recalls) the configuration prof ile according to the parameter supplied. If no parameter is specified, zero is assumed. Either Z0 or Z1 r estores the profile. Result Codes: &Cn Data Carrier Detect (DCD) control Data Carrier Detect is a sig[...]

A T Commands A T command formats 26 &Dn Data T erminal Ready (DTR) control This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal. Result Codes: &F Load factory settings This command loads the configuration stored and programmed at the factory . This operation replaces all of the command [...]

A T Commands A T command formats 27 command is only used in V .22 and V .22bis mode. This option is not used from North America and is for international use only . Result Codes: &Kn Local flow control selection Result Codes: &Pn Select Pulse Dial Make/Break Ratio &G0 Guard tone disabled (default). &G1 Sets guard tone to 550 Hz. &[...]

A T Commands A T command formats 28 Result Codes: &Tn Self-test commands These tests can help to isolate problems if you experience periodic data loss or random errors. Result Codes: &V View active configuration and stored profile This command is used to display the active prof iles on your computer’ s monitor . For ex am p l e: OK n=0 to[...]

A T Commands A T command formats 29 Press any ke y to continue; Esc to quit. Press any ke y to continue; Esc to quit. Speaker V olume Medium L Speaker Control OnUntilCarr M Result Codes Enable Q Dialer T ype T one T/P Result Code Form T ext V Extend Result Code Enable X Dial T one Detect Enable X Busy T one Detect Enable X LSD Actio n Standard RS- [...]

A T Commands A T command formats 30 Press any ke y to continue; Esc to quit. Stored phone numbers &Z0= &Z1= &Z2= &Z3= OK &W Store current configuration Sav es the current (acti ve) configuration (prof ile), including S- Registers. The current configuration comprises a list of storable parameters illustrated in the &V command[...]

A T Commands A T command formats 31 &Zn=x Store telephone number This command is used to store up to four dialing strings in the modem’ s non volatile memory for later dialing. The format for the command is &Zn=“stored number” where n is the location 0-3 to which the number should be written. The dial string may contain up to 40 chara[...]

A T Commands A T command formats 32 Result Codes: Qn Local flow control selection Result Codes: Vn Protocol result code Result Codes: N5 V .42. MNP or Buffer (s ame as N3). N7 V .42. MNP or Buffer (s ame as N3). OK n = 0, 1, 2, 3,4,5,7 ERR OR Otherwise Q0 Disable flow control. Q1 XON/XOFF software flo w control. Q3 R TS/CTS to DTE (default)[...]

A T Commands A T command formats 33 %Cn Data compression control This command determines the operation of V .42bis and MNP class 5 data compression. Online changes do not take effect until a disconnect occurs first. Result Codes: -V .90=<n> This command enables/disables V .90 and changes the do wnstream rate. Possible values of n: %C0 V .42bi[...]

A T Commands A T command formats 34 +MS Command This command can be used to set protocol and connection speed parameters for the modem. Instead of having to change multiple S registers, this single command produces the same ef fect. The command can also be used to provide information concerning the current modem protocol settings and maximum connec[...]

A T Commands A T command formats 35 +MS= <carrier>, <automode>, <0>, <max_rate>, <0>, <max_r x_rate> This command is used to set th e various parameters described below: Example: +MS=V90C,1,0,0,0,0 This sets the modulation to be V .90 and the speed negotiations to use automode. This is the modem default. Example:[...]

A T Commands A T command formats 36 +MS:(V21,V22,V22B,V23,V32,V32B,V34,V90C,56K),(0,1), (0),(0,300-33600),(0),(0,300-56000) The valid v alues for carrier are: The valid v alues for max_rate for the dif ferent carriers are: The valid v alues for max_rx_rate for the dif ferent carriers are: Va l u e M e a n i n g V90C or V90 V90 K56 K56fle x V34 V34 [...]

A T Commands A T command formats 37 V32bis 4 800-19200 in steps of 2400 V32 4800-14400 V22bis 24 00 V22 2200 V23 1200 V21 300[...]

Chapter 4 S-Register v alues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 A T command set result codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46[...]

39 S-Registers S-Registers contain the settings that determine ho w se veral functions of the internal modem operate, such as choosing how many times to let the telephone ring before the modem answers and how long to w ait before it ha ngs up if a connection fails. Y ou can also customize certain A T commands, such as the escape sequence and comman[...]

S-Registers S-Re gister values 40 S-Register values ❖ The format for displaying the v alue of an S-Register is: AT S n ? where n is the register number . After you type in the register press Enter . ❖ The format for modifying the value of an S-Re gister is: A TSn=r where n is the register number , and r is the new re gister value. After you typ[...]

S-Registers S-Re gister values 41 S2 A T escape character (user - defined) This regis ter determines the ASCII v alue used for an escape sequence. The default is the + chara cter . The escape sequence allows the modem to e xit data mode and enter command mode when online. V alues greater th an 127 disable the escape sequence. S3 Command line termin[...]

S-Registers S-Re gister values 42 recognize the backspace character if it is set to an ASCII value greater than 32. This character can be used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the backspace charac ter , an ASCII space character , and a second backspace character . This means a total of[...]

S-Registers S-Re gister values 43 S8 Comma pause time This register sets the time, in seconds , that the modem must pause when it encounters a comma (,) in the dial command string. S10 Automatic disconnect delay This register sets the length of time , in tenths of a second, that the modem waits before hanging up after a loss of carrier . This allow[...]

S-Registers S-Re gister values 44 S11 DTMF dialing speed This register determines the dialing speed. S12 Escape guard time This re gister sets the v alue (in 20 ms increments) for the required pause after the escape sequence (d efault 1 second). S37 Dial line rate Range: 50-150 Default: 95 Units: .001 seconds Range: 0-255 Default: 50 Units: .02 sec[...]

S-Registers S-Re gister values 45 S38 K56flex Dial line rate S38 enables and disables K56flex mode and sets the maximum K56flex do wnstream speed that the modem attempts to connect. NOTE: Not all modems support K56flex. If this command returns an ERROR, then K56flex is not supported. S38 56K Downstream Rate T o force a particular 56K do wnst ream r[...]

S-Registers A T command set r esult codes 46 A T command set result codes The follo wing table shows the result codes. S38=3 34 kbps S38=4 36 kbps S38=5 38 kbps S38=6 40 kbps S38=7 42 kbps S38=8 44 kbps S38=9 46 kbps S38=10 48 kbps S38=11 50 kbps S38=12 52 kbps S38=13 54 kbps S38=14 56 kbps Command Set Result Codes T able Result Code Numeric Descri[...]

S-Registers A T command set r esult codes 47 ERR OR 4 In v alid command CONNECT 1200 EC * 5 C onnection at 1200 bps NO DIAL TO NE 6 No dial tone detected BUSY 7 Busy signal detected CONNECT 2400 EC * 1 0 Con nection at 2400 bps CONNECT 4800 EC * 1 1 Con nection at 4800 bps CONNECT 9600 EC * 1 2 Con nection at 9600 bps CONNECT 14400 EC * 1 3 Con nec[...]

S-Registers A T command set r esult codes 48 CONNECT 57600 EC * 1 8 Con nection at 57600 bps (DTE rate) CONNECT 115200 EC* 87 Connection at 115200 bps (DTE rate) CONNECT 32000 EC * 7 0 Connection at 32000 bps (56K mode) or V .90 CONNECT 34000 EC * 7 1 Connection at 34000 bps (56K mode) CONNECT 36000 EC * 7 2 Connection at 36000 bps (56K mode) or V [...]

S-Registers A T command set r esult codes 49 CONNECT 52000 EC * 8 0 Connection at 52000 bps (56K mode) or V .90 CONNECT 54000 EC * 8 1 Connection at 54000 bps (56K mode) CONNECT 56000 EC * 8 2 Connection at 56000 bps (56Kflex mode) CONNECT 28000 EC* 100 Connection at 28000 bps (V .90 mode) CONNECT 29333 EC* 101 Connection at 29333 bps (V .90 mode) [...]

S-Registers A T command set r esult codes 50 CONNECT 45333 EC* 109 Connection at 45333 bps (V .90 mode) CONNECT 46666 EC* 110 Connection at 46666 bps (V .90 mode) CONNECT 49333 EC* 111 Connection at 49333 bps (V .90 mode) CONNECT 50666 EC* 112 Connection at 50666 bps (V .90 mode) CONNECT 53333 EC* 113 Connection at 53333 bps (V .90 mode) CONNECT 54[...]

Chapter 5 Error-correction o vervie w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Flow control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Data compr[...]

52 MNP and V .42 The internal modem has built-in protocols MNP ® (Microcom Networking Protocol) Class 4 and V .42 for error correction and MNP class 5 and V .42bis for data compression. Error -correction over view T elephone line noise, or electrical interference, can c ause errors in data communication. Noise is espe cially a problem at high spee[...]

MNP and V .42 Operation modes 53 The protocol of both modems must be the same. Therefore, if the remote modem supports only class 3 or below , the protocol for the remote modem will be used. If the remote modem does not use MNP , the communication will be made at the speed of the remote modem. V .42 error correction The V .42 (ITU-T -Rec V .42) pro[...]

MNP and V .42 Flow contr ol 54 Commands ( Nn ) The follow ing N modulation handsha ke commands are used to set the communication mode: For det ails, refer to “ A T Commands” on page 13 . Flow control In both normal mode and reliable mode, the buf fers in the modem and its flow control function permit communication ev en if the speed is dif fer[...]

MNP and V .42 Flow contr ol 55 The modem card has two kinds of flo w control: ❖ Serial port flow control ❖ Modem port flow control (only in reliable mode) Flow contr ol Serial port flow control Serial port data flow is co ntrolled by the modem in its communication with a personal computer . If the serial port speed is higher than the modem port[...]

MNP and V .42 Flow contr ol 56 XON/XOFF flow control (software) Flo w control is performed by sending XON and XOFF control codes in the data stream. The XOFF code makes a transmission halt request. The XON code makes a transmission restart request. Since these two codes, XON and XOFF , are used as flow control characters, binary data that in cludes[...]

MNP and V .42 Data compr ession 57 If data transmission from the m odem under serial port flow control is interrupted because the computer cannot catch up with it, modem port flow control is applied to the remote modem so that transmitted dat a will not exceed bu f fer capacity . This flow control functions in normal mode only . Data compression Pr[...]

Chapter 6 T est description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 T esting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60[...]

59 T est Function Normally , data commu nications are ex ecuted by connecting your computer and modem to those of a remote station with a communication line. If any er rors or malfunctions are encountered, it is necessary to check whether the cause is in the local station, the remote stat ion or the communication line. T est description This intern[...]

T est Function T esting pr ocedur e 60 Local/analog/loopbac k test T esting procedure T o conduct the loopb ack test: 1 Enter the follo wing A T commands to set the modem to normal mode: AT & F N 0 Recei ve OK Computer Modem T ransmitter Receiver T ransm ission Reception[...]

T est Function T esting pr ocedur e 61 2 Enter the follo wing A T commands to select the local/ analog/ loopback test: AT & T 1 Y ou are now in the online state. 3 Enter characters from the keyboard as desired. The characters you enter should be displayed on the screen. 4 Enter the escape code as follo ws to return to the command state from the[...]

Appendix A[...]

63 Specifications This appendix summarizes the T oshiba internal modem’ s technical specif ications. Network control unit (NCU) Ty p e o f N C U A A T ype of line General telephone line T ype of dialing Pulse To n e Control comm and A T commands EIA-578 commands Monitor function Computer’ s speaker[...]

Specifications 64 Communication specifications Communication system Data: Full duplex Fax: Half duplex Communication protocol Data ITU-T -Rec V .21 / V .2 2 / V .22bis / V .32 / V .32bis / V .34 / 56 K / V .90 Bell 103/212A Fax IT U -T - Re c V. 1 7 / V. 2 9 / V. 2 7 t e r (Former CCITT) /V .21 ch2 Communication speed Data 300 / 1200 / 2400 / 4800 [...]

Appendix B[...]

66 Communication Conditions Communication parameters Select communication parameters from the table belo w. Start (bit) Data length (bit) Pa r i t y (bit) Stop (bit) 1 8 None 1 or more 17 0 1 o r m o r e 17 1 1 o r m o r e 17 O d d 1 o r m o r e 1 7 Ev en 1 or more 1 7 None 2[...]

Communication Conditions 67 T elephone line types This internal modem can be connected to 2-wire analog subscriber telephone lines (PO TS lines) only . Connectable lines (2-wire) ❖ Ordinary analog telephone lines with direct connection ❖ Corporate analog lines connected to a PBX ❖ Analog lines connected to a PBX, which, for example, provide d[...]

Communication Conditions 68 If you connect to the dialed number , the line is tone dial type. If you do not get a connection, it is pulse dial type. The command A TDP will conn ect a pulse line.[...]

69 Gl os s a r y Acronyms bps or BPS: Bits per Second COM1: Communicatio ns Port 1 (serial port) COM2: Communicatio ns Port 2 (serial port) CPU: Central Processi ng Unit FCC: Federal Co mmunications Co mmission FTP: File T ransfer Protocol GND: Ground HDD: Hard Disk Drive HTML: HyperT ext Markup Language I/O: Input/Output IRQ: Inte rrupt Request IS[...]

Glossary 70 LFB: Linear Frame Buffer LPT1: Line Printer Port 1 (parallel port) MB: Me gab yte MIPS: Millions of Instruction s per Second PBX: Pri vate Branch Exchange PCI: Peripheral Component Intercon nect PIO: Programmed Input/Output RFI: Radio Frequency Interference RO M : Read-Only Memory RTC: Real-T ime Clock SIMM: Single Inline Memory Module [...]

Glossary 71 American National Standards Institute (ANSI) char acter set: The set of characters a vailable in Micros oft Windo ws (or other operating system). The character set include s letters, numbers, symbols and foreign language characters. American Standard Code for Informa tion Inter change (ASCII): A set of 256 binary codes that represent th[...]

Glossary 72 buff e r: An area of memory where inform ation is held un til it can be processed. Buf fers are frequently used to compensate for the f act that some parts of the system are faster than others. F or example, the computer sends information to a pr inter much f aster than ev en the fastest printer can ha ndle it. A print buffer stores pri[...]

Glossary 73 Class 1: A standard for fax transmission. The T oshiba internal mod em supports class 1. choose: T o use the mouse o r keyb oard to select a menu item, a button or an icon. click: T o press and release a mouse button. In W indo ws, refers to the left mouse button, unless otherwise stated. COM1 and COM2: Names that the operating system g[...]

Glossary 74 DCE (Data Communications Equipment or Data Circuit-terminating Equipment): A device that establishes, ma intains and terminates a session on a network. It may also conv ert signals for transmissi on. It is typically the m odem. DCD signal : This signal tells th e persona l computer whether the modem is recei ving the carrier fr om the o[...]

Glossary 75 escape: 1) T o cancel the task currently in progress. 2) A code (ASCII code 27, generated by the Esc ke y) telling the compu ter that what follo ws are commands, not data. Used with peripheral devices such as printers and modems. E r ro r c o n t ro l: Detection of errors in data communicatio n. Requests retransmission of data in which [...]

Glossary 76 handshake: After a telephone l ine is co nnected from one station to another , some signals are exchange d according to the ITU-T or Bell standard to confirm that the standa rd is the same between the calling and called stations prio r to starting d ata communicatio n between them. This ex change of signals is called handshake. hangup: [...]

Glossary 77 modem: A device for transmitting computer information over telephone lines. A modem conv erts (mo dulates) digital infor mation for transmission and also con verts (dem odulates) information it recei ves back to digital format. Man y modems also interpret and ex ecute commands receiv ed from the computer . modem port: The port to send a[...]

Glossary 78 pr otocol: A set of rules and conv entions th at makes it possible to transfer information between computers. If you’ re transmitting a file, both modems must use the same pro tocol—just as two people talking o n the telephone must speak the same languag e to communicate ef fectively . Examples of modem protocols are V .34, V .42, a[...]

Glossary 79 S-Re gister : The S-Register stores the pa rameters for various commands and modem operations. synchr ono us: Having a constant time interv al between successive bits, characters or ev ents. Synchronous data transmission req uires both the sending and receiving de vices to use special synchronizing characters to correct v ariations in t[...]

80 Index Numerics 56K technology xi i i A analog/loopback test 5 9 answer command 1 4 A T command set result codes 4 6 A T commands answer command 1 4 communication standard setting 14 data carrier detect 2 5 data compression control 3 3 data terminal ready (DTR) 2 6 dial a telephone number 1 5 dial tone detect 2 4 display result codes 2 3 echo com[...]

Index 81 view acti ve conf iguration and stored profile 2 8 C call recei ving 9 terminating 9 Clear T o Send 1 0 communication standard setting 1 4 communications dial mode types 67 facsimiles 11 handshake commands 5 4 modes 5 4 parameters 66 protocols supported x v specifications 63 telephone line types 6 7 connecting internal modem 5 , 6 connecti[...]

Index 82 M MNP protocol 5 2 modem connecting internal 5 flow control function 5 4 modem port 55 serial port 5 5 maximum connection sp eed 3 4 protocol settings 3 4 protocols x i i i MS command 3 4 N N modulation handshake 2 1 O operation modes 5 3 normal 5 3 reliable 5 3 P protocol result code 3 2 protocols MNP 5 2 V. 4 2 5 3 R recall stored config[...]

Index 83 test function loopback test 6 0 transfer on/transfer of f 1 0 V V .42 protocol 5 3 V .90 enable/disable 3 3 view acti ve conf iguration and stored profile 28 X XON/XOFF control 1 0[...]