Westermo TD-22 User Manual

PTT ModemINSTALLATION MANUAL6177-2203www.westermo.seTD-22 ACTD-22 DC©Westermo Teleindustri AB • 1998 • REV AGalvanicIsolationTransientProtectionCEAppr

116177-2203LED Status IndicatorsPWR: Full Intensity The modem is functioning normallyHalf intensity The modem is in test mode or remote configuration

12 6177-2203DTE Command LinesA command line is a string of characters sent from a DTE to the modem (DCE) while the modem isin a command state. A comma

136177-2203AT COMMAND SETThe modem will respond to the commands detailed below. Parameters applicable to each commandare listed with the command descr

14 6177-2203&Bn – DTR Dial OptionThis command interprets the OFF to ON transition of the DTR signal from the DTE to enable themodem to dial the te

156177-2203Dn – DialThis command directs the modem to go on-line, dial according to the string entered and attempt toestablish a connection. If no dia

16 6177-2203&Dn – DTR OptionThis command interprets the ON to OFF transition of the DTR signal from the DTE in accordancewith the parameter suppli

176177-2203%En – Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward (V.22bis only)Controls whether or not the modem will au

18 6177-2203%Fn – Split-Speed direction select, V.23Determines which direction (transmit or receive) has the 75bps channel and which has the 1200bpsch

196177-2203Hn – Disconnect (hang up)This command initiates a hang up sequence.This command may not be available for some countries due to PTT restrict

20 6177-2203\Kn – Break ControlControls the response of the modem to a break received from the DTE or the remote modem or the\B command according to t

36177-2203TABLE OF CONTENTSINTRODUCTION ...

216177-2203Ln – Speaker VolumeThe modem sets the speaker volume control according to the parameter supplied. The parametervalue, if valid, is written

22 6177-2203*L – Display secure access (callback) directoryThe modem will display all secure access (callback) directory entries.Format: Entry Number

236177-2203&Mn – Asynchronous/Synchronous Mode SelectionThis command determines the DTR operating mode. The modem treats the &M command as a s

24 6177-2203\Nn – Operating ModeThis command controls the preferred error correcting mode to be negotiated in a subsequent dataconnection. This comman

256177-2203Qn – Quiet Results Codes ControlThe command enables or disables the sending of result codes to the DTE according to the parametersupplied.

26 6177-2203&Rn – RTS/CTS OptionThis selects how the modem controls CTS. CTS operation is modified if hardware flow control isselected (see &K

276177-2203&Sn – DSR OverrideThis command selects how the modem will control DSR. The parameter value, if valid, is written toS21 bit 6.&S0 DS

&Tn – Test and DiagnosticsThe modem will perform selected test and diagnostic functions according to the parameter supplied.A test can be run only

296177-2203&V – Display Current Configuration and Stored ProfilesReports the current (active) configuration, the stored (user) profiles, and the f

30 6177-2203\W – Split Speed OperationThis command supports a split-speed DCE/DTE interface for applications such as Viewdata terminalswhich require a

4 6177-2203IntroductionThe Westermo TD-22 is an industrialised dial and leased line modem. This modem has beendeveloped to be used in industrial appli

316177-2203&Xn – Select Synchronous Clock SourceSelects the source of the transmit clock for the synchronous mode of operation. The parameter valu

32 6177-2203Zn – Soft Reset and Restore ProfileThe modem performs a soft reset and restores (recalls) the configuration profile according to theparame

336177-2203Result CodesWhen a command is sent from the terminal the modem replies with a result code. The reply may beeither in Long Form i.e. text (V

34 6177-2203S-REGISTERSBelow follows a description of the S-registers and its different components. Note that someparameters can not be changed due to

356177-2203S10 – Lost Carrier To Hang Up DelaySets the length of time, in tenths of a second, that the modem waits before hanging up after a loss ofca

36 6177-2203S16 – General Bit Mapped Test Options Status (&T) (Read only register, not stored with &W)Indicates the test in progress status. B

376177-2203Bit 5 RLSD (DCD) behaviour (&Cn)0 = &C0 selected (Default.)1 = &C1 selectedBit 6 DSR behaviour (&Sn)0 = &S0 selected

38 6177-2203Bits 6-7 Guard tone (&Gn)0 = None (&G0)1 = None (&G1)2 = 1800 Hz (&G2) (Default.)S24 – Receiver disconnect levelIf %D1 is

396177-2203S29 – Flash Dial Modifier Time (Not stored with the AT&W command. Only for Germany)Sets the length of time that the modem will go on-ho

40 6177-2203S38 – Delay Before Forced Hang Up (Not stored with the AT&W command!)This register specifies the delay between the modem's receip

56177-2203SpecificationsInstallationThe modem should beconnected in the followingway:Power connection is madethrough screw-block at bottomright corner

416177-2203Bit 3 Modem-to-modem flow control0 = Disabled (\G0) (Default.)1 = Enabled (\G1)Bits 4-5 ReservedBit 7 Enable fallback to V.22 bis/V.22 (

42 6177-2203S200 – Bit Mapped RegisterBit 0 If not set is normal faxspeeeds used, or else it is a special function.Bit 6 and 7 Equal to \C command (No

436177-2203Example1:Several commands can be stacked on each command-line. For exampleATEQ1\N4D12345can be used instead of ATE0OKATQ1OKAT\N4OKATD12345w

To use multidrop V23 in half duplexMultidrop connection is possible only when the modem is set for V23 half duplex. This allows amaximum line transmis

456177-2203Dial up with hardware signallingDial-up can be made by applying an external signal to the DTR-pin in the RS-232 contact. A typicalapplicati

Leased line applicationsLeased line connections can be done using either 2-wire or 4-wire.When renting a 4-wire line from a telephone company one pair

476177-2203GlossaryASCIIA binary code system which defines 128 characters using different combinations of 1s and 0s. ASCII= American Standard Code for

48 6177-2203V.42bis.Data Compression technique used by modems rather than MNP5, because it offers bettercompression on already compressed data.Data Ra

496177-2203Modulation TechniquesDPSKDifferential Phase Shift Keying. employed in data rates up to 4800bps.FSKFrequency Shift Keying. Used in the lowes

50 6177-2203RS232 SignalsTDTransmitted Data. Data going from DTE to DCE.RDReceived Data. The Data going from DCE to DTE.RTSRequest to Send. Hardware

25 Pin Screw Direction Name DescriptionD-sub Terminal DCE-DTE1 - - - PE Protective earth2 8 TXD Transmit data3 7 RXD Receive data4 6 RTS Request to

516177-2203OWN COMMENTS...

6177-2203 11.98 TunaTryck AB, Eskilstuna, SwedenWestermo Teleindustri AB • S-640 40 Stora Sundby, SwedenPhone +46 16 612 00 Fax +46 16 611 80E-mail: i

76177-2203Typical TD-22 line connections4-positionscrew-terminalHandshakingLeased line 2-wireTelephoneexchangeTelephoneexchangeDial up line 2-wireTele

8 6177-2203DIP Switch SetupDisconnect power before changing DIP-switches.Take ESD-protection when changing switches.The DIP-switches can be used to pr

96177-2203SW4:87654321Select speed and parity towardscomputer/terminal0 0 0 0 Automatic speed and format setting up0 0 0 1 300 Baud0 0 1 0 600 Baud0 0

10 6177-22038765321Select Line Modulation0 0 0 Use saved parameters0 0 1 V.21 300 bps (0-300) ATF10 1 0 V.23 Hdx ATF3 %F30 1 1 V.23 1200/75 bps ATF31