Motorola V3229 - 14.4 Kbps Modem, V3229 V3229L Operating Instructions Manual

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V.3229 / V.3229L

Installation and Operation

Motorola

Doc. 6 209 5262 07 014

20 Cabot Boulevard

May 1995

Mansfield, MA 02048

(508) 261-4000

<C#>

Introduction

V.3229 / V.3229L <C#>-1

Introduction

Chapter 1

Introduction

GENERAL

The UDS V.3229 and the V.3229L are versatile high speed asynchronous or synchronous modems that allow data transfer between two host computers via the telephone communication system.

The modems can operate full-duplex on both dial-up and leased lines. The modems are compatible with all required standards and recommendations, and feature a wide variety of automatic, remote, and backup capabilities.

Major characteristics include:

¥14.4 kbps data rate ¥V.42 bis and MNP 5 error control protocols with data compression ¥a V.25 bis autodialer ¥secure operation ¥trellis coding for superior signal-to-noise performance.

Data Rates

The V.3229 operates at data rates of

¥7.2, 12.0, and 14.4 kbps trellis-coded per CCITT V.32 bis ¥9.6 kbps trellis-coded and 4.8 and 9.6 kbps uncoded per CCITT V.32 bis ¥2400 and 1200 bps per CCITT V.22 bis ¥300 bps per Bell specification 103

DESCRIPTION

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Introduction

<C#>-2 V.3229 / V.3229L

Introduction

Functional

The V.3229 processes serial asynchronous data from a DTE at all standard rates from 300 bps to 57.6 kbps, and serial synchronous data at rates from 1.2 to 14.4 kbps. Transmission can be over the dial-up telephone network or 2- or 4-wire, point-to-point, dedicated leased lines. The maximum telephone line speed is

14.4 kbps.

Built-in test features can determine system performance and isolate faults in the data link.

Operation and configuration are controlled by either the front panel LCD, the AT command set or V.25 command set. Changes can be made easily.

AutoConfiguration

AutoConfigure allows any of eleven option sets to be quickly enabled or selected as the powerup configuration. There are two ways to enable option sets: the LCD and the AT command set. Refer to Chapter 3 and 5 respectively.

Appendix D lists the nine factory option sets. For maximum versatility two additional options sets designed by the user can also be stored for instant recall or as the powerup configuration.

Remote configuration allows option changes to be made to a remote unit.

Standard and L Models

The modem is available in two models: standard and the L model. The standard model has a 32 character (liquid crystal display) LCD front panel with three pushbuttons for option selection (Figure 1-1).

The L model has a TALK LED and TALK/DATA

<C#>

Introduction

V.3229 / V.3229L <C#>-3

Introduction

button. The LED is on in talk mode and off in data mode; the pushbutton selects between the two modes (Figure 1-2).

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Introduction

<C#>-4 V.3229 / V.3229L

Introduction

Both models have six light emitting diodes (LEDS) to show communication status between the modem and data terminating equipment (DTE).

Standalone and Shelf Units

The standard and L models are available in both standalone or shelf mount configurations. The pc (printed circuit) boards are identical for either so that the standalone board can be field changed for use in the shelf or vice versa. Hardware straps on the pc board offer additional customer options.

The shelf mount unit has edge connectors that insert into the shelf backplane. The shelf backplane performs the same functions as the standalone rear panel.

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Introduction

V.3229 / V.3229L <C#>-5

Introduction

The standalone rear panel has an EIA-232 DTE connector, an 8-pin (TELSET / LEASED LINE) jack, and an 8-pin (DIAL) jack, the power switch, fuse and power cord (Figure 1-3). Some versions have a 110/220V selection switch.

HOW TO USE THIS MANUAL

Most of the manual applies to both the standard and the L model. Users of the L model can ignore Chapter 3 and other explanations of LCD and pushbutton operation throughout the manual. However, these discussions include valid operating information and can be consulted as desired.

Option Selection

There are six ways to change or select options:

¥LCD - Using the front panel LCD and pushbuttons is simple, straightforward, and requires the least amount of technical background. Refer to Chapter 3.

¥ Software program - A variety of software programs is available, or advanced computer users can write their own software programs to interact with the modem. This manual does not discussed software programs.

¥AT Commands - The AT compatible command set can be used to select modem options. Refer to Chapter 5.

¥Status Registers - A series of special ATS commands allows the user to change the decimal or hexadecimal value of a memory byte to change one or more options in that byte. Refer to Chapter 6.

¥Single Bit Commands - A second series of special ATS commands allows the user to change single bits

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Introduction

<C#>-6 V.3229 / V.3229L

Introduction

within a byte to changeanoption. Refer to Chapter 6.

¥V.25 bis Commands - An extended set of V.25 commands allows selection of modem options during synchronous operation. Refer to Chapter 7.

Quick Startup

A quick startup procedure at the beginning of Chapter 4 provides information for quickly getting online.

Specifications

Appendix A contains modem specifications.

SECURITY

Three separate security schemes prevent unauthorized access to local and remote modems and DTEs:

¥An AT command password prevents remote configuration of the modem.

¥An AT command password prevents remote access to the DTE while operating in dial-up mode.

¥An autocallback option requires the remote modem to callback the originating modem using the remote unit's autodial capability.

<C#>

Introduction

V.3229 / V.3229L <C#>-1

Installation

Chapter 2

Installation

GENERAL

This chapter provides information for the mechanical and electrical installation of the modem.

SITE SELECTION

Install the modem within 6 feet of a standard 115 or 230 Vac grounded wall outlet as required for the specific model and no further than 50 feet from the terminal equipment.

The installation area should be clean and free from extremes of temperature, humidity, appreciable shock, and vibration. See equipment specifications in Appendix A for details. Allow clearance for operation and maintenance and at least 4 inches at the rear for cables and air flow.

Receipt Inspection

After unpacking the equipment, check the contents against the packing list. Inspect the equipment for any damage that may have occurred in shipment. If any damage or equipment shortage is noted, refer to the warranty literature. Keep the shipping container and material.

Tools Required

Normal installation requires a screwdriver to secure the data terminal equipment (DTE) cable to the modem and to attach the telephone cable to the 42A terminal block for leased line operation.

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Introduction

<C#>-2 V.3229 / V.3229L

Installation

Strap Inspection

Several hardware straps on the printed circuit board may require changing prior to installation. Refer to Strap Option Selection at the front of Chapter 3 for information.

ELECTRICAL INSTALLATION

The rear panel (Figure 2-1) houses connectors for the DTE cable and telephone lines.

AC Power Connection

Power is supplied through a 6-foot line cord with a grounded 3-wire plug. If common ground is available through the third prong of the plug, a separate ground wire is not required. If the modem has a 110/ 220V switch, select the appropriate voltage. If 220 Volt operation is selected, install the supplied 1/8 Amp fuse before connecting power to the modem.

DC Power Input Option

Caution: To protect the dc to dc converter from damage, ensure the positive and negative leads are properly connected.

If the modem is equipped for dc power input, connect 12 to 60 Vdc power to the terminal block attached to the modem back panel. A chassis ground connection is also supplied on the terminal block.

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Introduction

V.3229 / V.3229L <C#>-3

Installation

DTE CONNECTION

The DTE connector is a 25-pin D-series type conforming to EIA-232 specifications. Pin signals are shown in Figure 2-2 and described in Table 2-1.

TELEPHONE LINE CONNECTION

The modem operates in one of three line-related modes:

¥Permissive (PSTN) ¥Programmable (PSTN) ¥Private line

Permissive and programmable modes are used on the Public Switched Telephone Network (PSTN). Private line mode is used on 4-wire or 2-wire dedicated leased lines. The user must decide which mode to use and then select the telephone jack arrangement accordingly.

PSTN Connection

Modems are registered with the Federal Communications Commission (FCC) for direct connection to the PSTN (dial-up network). The label on the chassis bottom gives the FCC registration number and other information.

Direct connection to the PSTN provides two modes of operation (Figure 2-3):

¥Permissive (standard) ¥Programmable

Permissive

In permissive mode, the modem transmits a maximum signal level of -10 dBm. For standard tele-

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Introduction

<C#>-4 V.3229 / V.3229L

Installation

phones the jack arrangement is RJ11C . Cable PN 61020202-0301 connects the DIAL jack on the back of the modem to the RJ11C wall jack.

Programmable

<C#>

Introduction

V.3229 / V.3229L <C#>-5

Installation

Programmable mode corrects for the signal level loss between the modem and the telephone company central office. This is done by setting the modem transmit output signal level with a resistor selected and installed in the jack by the telephone company. This allows the output signal to reach the central office at the optimum level of -12 dBm. Jack arrangements for this mode are the RJ45S (Programmable) and RJ41S (Universal). The RJ41S has a switch option that must be selected to Programmed (P). Cable PN 61020192-0301 (not supplied with modem) is used to connect the DIAL jack to the RJ41S or RJ45S wall jack.

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Introduction

<C#>-6 V.3229 / V.3229L

Installation

* Modem options may force these signals on or cause them to be ignored.

Tabl e 1:

n N

EIA-

232D

CCI

V.24

Signal Name Description

1 101 Shield Protective Ground

2 BA 103 Transmitted

Data

Serial digital data (to be modulated) from a data terminal or other digital data source: Synchronous data must be accompanied by the modem transmit clock (pin 15) or by an external data rate clock (pin 24). Data transitions should occur on negativegoing clock transitions; asynchronous data does not require a transmit clock.

3 BB 104 Received Data Serial digital data output to the DTE

interface: Sync data is accompanied by an internal data rate (receive) clock (pin 17) with negative-going transitions on the data transition. Async datadoes not requirea receive clock.

4 CA 105 Request to

Send

A positive level to the modem when data transmission is desired

5 CB 106 Clear to Send A positive level from the modem in

response to request to send and when the modem is ready to transmit*

6 CC 107 Data Set Ready A positive level from the modem

when power is on and ready to operate. In dial-up operation, the modem must be off hook to give a high DSR signal.*

7 AB 102 Signal Ground

or Common

Return

Common signal and DC power ground

8 CF 109 Received Line

Signal Detector

A positive level from the modem indicating the presence of a received signal (carrier detect)*

9 +12 Volts +12 voltage reference

10 -12 Volts -12 voltage reference

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Introduction

V.3229 / V.3229L <C#>-7

Installation

<C#>

Introduction

<C#>-8 V.3229 / V.3229L

Installation

* Modem options may force these signals on or cause them to be ignored.

This function can be disabled or its logic sense reversed by hardware straps.

Tabl e 2:

n N

EIA-

232D

CCI

V.24

Signal Name Description

11 Signal Quality

Indicator

This circuit indicates probability of errors in the received data: a positive level indicates poor signal quality while a negative level indicates good signal quality.

15 DB 114 Transmit Clock

(DCE)

A transmit data rate clock output for use by the DTE equipment. Negative clock transitions correspond to data transitions.

17 DD 115 Receive Clock A receive data rate clock output for

use by the DTE equipment. Negative clock transitions correspond to data transitions.

18 141 Local Loopback

(Loop 3) Control

A positive level causes the modem to enter the local analog loopback test mode.*

20 CD 108.2Data Terminal

Ready

This circuit is positive when the DTE is ready to originate or answer a call in dial-up operation. DTR must always be active (high)in 2-wire private line operation. Cycling DTR causes retraining.*

21 140 Remote Digital

Loopback

A positive level causes a digital loopback test mode at the remote modem.

22 CE 125 Ring Indicator In dial line operation this circuit is

positive in response to an incoming ring signal.*

23 CH 111 Data Rate Se-

lect

Supplies a data rate control input to select primary or fallback data rate: Negative voltage selects primary data rate and positive voltage selects fallback data rate.*

24 DA 113 External

Transmit Clock

A serial data rate clock input from the data source. Negative clock transitions correspond to data transitions.

25 142 Test Mode Indicates the modem is in a test mode

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Introduction

V.3229 / V.3229L <C#>-9

Installation

Refer to Strap Options.

Note: The modem is compatible with exclusion key phone arrangements.

Leased Line Connection

The modem operates on either 2-wire or 4-wire leased lines. The telephone company will install the leased line and wall jack at your site. The line connects to the modem at the 8-position TELSET/ LEASED LINE jack.

The 42A block is the most common termination for leased line use. It requires the use of the 8-pin modular to spade lug cable (PN 61020569-0000). Figure 2-4 illustrates the typical hook-up of the modem for operation over private leased lines with dial backup.

Note: Although the 42A block is the most common, some Bell operating companies have discontinued its use for leased lines. Instead, the modular jack JM8 is used. If this is the case in your area, you need a special cable (PN 61020575-0000). Contact your distributor for further information.

<C#>

Introduction

<C#>-10 V.3229 / V.3229L

Installation

<C#>

Introduction

V.3229 / V.3229L <C#>-11

Installation

V.3229 / V.3229L <C#>-1

Option Selection

Chapter 3

Option Selection

GENERAL

Note: This chapter contains the options available by pushbutton in response to the LCD. Users of the L model are encouraged to consult the different sections of this chapter as appropriate for further information on modem operation and option selection.

Nine factory option sets provide complete setups for most data communication arrangements. The modem is shipped configured to factory option set #1. Appendix D lists the options for each set. Because of the number of possible applications, most modems require some option changes to fit the application.

Two user programmed option sets are also available. These allow the user to configure customized option sets and store them in memory for immediate recall or as the powerup configuration.

The AutoConfigure feature, explained later in this chapter, allows immediate use of any stored option set.

STRAP OPTION SELECTION

Modem configuration is controlled by front panel pushbuttons and the LCD, AT or V.25 bis commands, and hardware option straps located on the pc board. Normally straps do not have to be changed. If a change is required, remove the modem cover to access the option straps.

<C#>-2 V.3229 / V.3229L

Option Selection

The strap diagrams on the following pages indicate the factory settings.

V.3229 / V.3229L <C#>-3

Option Selection

Removing Cover

Warning: Disconnect ac power before removing the cover. Although dangerous voltage levels are not exposed, disconnecting power ensures an electrical shock hazard is not present.

Place the unit on its side on a flat surface. To disengage the lock prong insert a medium size flat screwdriver blade in one of the bottom rear latch slots. DO NOT PUSH the screwdriver but lightly pry the handle away from the unit as illustrated in Figure 3-1. Assist removal by pushing the cover from the chassis with your fingers on the unit rear edges. Repeat this procedure with the remaining three latch slots.

<C#>-4 V.3229 / V.3229L

Option Selection

To replace the cover align the lock clips, rear guide grooves, and front lock tabs. Press the cover in place until the lock clips engage the lock prongs.

Board Identification

V.3229 / V.3229L <C#>-5

Option Selection

Two different printed circuit boards exist for the V.3229. After removing the cover use Figures 3-2a and 3-2b to identify which board is in your modem and to locate hardware straps. The board represented in Figure 3-2b has a piggyback board.

Setting Straps

Figure 3-3 shows a typical strap application.

HARDWARE STRAPS

Strap illustrations in this section match the board with the TR LED.

Tip and Ring Polarity

Some telephones are tip and ring polarity sensitive. If a dial tone is detected after dialing, reverse these two straps.

* factory setting

Ground Strap

Signal ground is normally connected to chassis ground. If interference exists, isolate signal ground from chassis ground.

QM Disabled

When enabled, the Quality Monitor (QM) output is connected to the EIA-232 (pin 11) interface. Disabling it disconnects the QM output. Refer to Chapter 4 and Table 2-1 for more information.

<C#>-6 V.3229 / V.3229L

Option Selection

QM Normal / Inverted

This strap only applies to the board shown in Figure 3-2b. Select normal or inverted QM output.

*factory setting

LCD OPTION SELECTION

Modem options can be checked or changed with the front panel LCD and pushbuttons.

Note: Options are also controlled by AT or V.25 bis operating commands discussed in Chapter 5 and 7.

MAIN MENU

Six main menus support modem operations:

¥MODEM STATUS ¥DIAL STORED NUMBER ¥DISPLAY STATUS ¥SELECT TEST ¥MODIFY CONFIGURATION ¥CHANGE PHONE NUMBERS

Each main menu contains submenus, items, and options (Table 3-1). The two right columns in the table show associated AT commands and S-registers.

Menu Sequence

The user can step through the menu by pressing the YES, NO, and TALK/DATA pushbuttons. Main Menus allow access to Submenus. Each Submenu

V.3229 / V.3229L <C#>-7

Option Selection

has a Submenu Item column; if an option setting is selected or if all options have been scrolled through, the menu returns to the Submenu header.

If the NO pushbutton is pressed and held, the modem scrolls through the menu.

Note: The displays in Main Menu 1 show the current operating mode or status. These displays are not option selections. In most cases, while operating in the option menu, pressing NO scrolls down the columns in Table 3-1 and pressing YES advances across the rows.

Table 3-1

Menu Options

Tabl e 1:

MAIN MENU LCD MESSAG-

+++

V.32b 14400 TALK V.32b 14400 TRAINING V.32b 14400 ONLINE V.32b 14400 RINGING V.32b 14400 IN TEST

+ (Press

NO to advance to MAIN 2)

M A

M E N U

SUBMENU SUBMENU ITEM ITEM

OP-

TION

AT COM-

MAND

S-

DIAL STORED NUMBER?

DIAL #1-9 YES,

DSn

(n-1-9)

---

DISPLAY STATUS?

(status only)

DTE SIGNALS QM ON/OFF

DSR ON/OFF OH ON/OFF RI ON/OFF

DISPLAY STATUS

--- ---

<C#>-8 V.3229 / V.3229L

Option Selection

* Modem must be online for results ** Modem must be online with protocols disabled

^ ^ PROTOCOL NONE

NEGOTIATING V.42 LAPM OR V.42 MNP 2/3/4/5

DISPLAY STATUS

--- ---

COMPRESSOR * NONE

MNP 5 V.42 bis

DISPLAY STATUS

--- ---

CARRIER DESCRIPTIONS*

RECEIVE LEVEL NEAR END ECHO LEVEL FAR END ECHO LEVEL FAR END ECHO DELAY ESTIMATED DELAY FREQUENCY

TRANSLATION

DISPLAY STATUS

--- ---

SELECT TEST? (Offline test only) LONG ANALOG LOOP INI-

TIATE, EXIT

&T1 S16

^^ LALWITHTP INI-

TIATE, EXIT

&T8 S16

^^ (4-wire only) REMOTE ANALOG

LOOP**

INITIATE, EXIT

&T2 S16

^^ ^ RALWITHTP** INI-

TIATE, EXIT

&T9 S16

^^ (Online test) LOCAL DIGITAL

LOOP**

INITIATE, EXIT

&T3 S16

^ ^ ^ REMOTE DIGITAL

LOOP**

INITIATE, EXIT

&T6 S16

^ ^ ^ RDL WITH TP** INI-

TIATE, EXIT

&T7 S16

^ ^ ^ TEST PATTERN** INI-

TIATE, EXIT

%T ---

Tabl e 1:

V.3229 / V.3229L <C#>-9

Option Selection

Table 3-1 Cont.

Menu Options

Tabl e 2:

M A

M E N U

SUBMENU SUBMENU ITEM ITEM

OPTION

AT COM-

MAND

S-

MODIFY CONFIGURA-TION?

CHANGE MODEM OPTIONS?

CHANGE DCE RATE DTE SPEED

14400 TRELLIS 12000 TRELLIS 7200 TRELLIS 9600 TRELLIS 9600 UNCODED 4800 UNCODED 2400 V.22 bis 1200 V.22 bis 300 BELL 103

%B %B9 %B8 %B7 %B6 %B5 %B4 %B3 %B2 %B1

^ ^ ^ FORCED ANSWER

OR NORMAL ORIGINATE

NORM ORIGIN FORCED

ANSWER

*OR

*OR1

^ ^ ^ V.32 FAST TRAIN ENABLE

DISABLE

*FT1

*FT

^ ^ ^ AUTO RETRAIN ENABLE

DISABLE

%E1

^^ ^ AUTORATE

RENEGOTIATION

DIS, low BER, med, high BER

%R, %R1,

%R2, %R3S53

^ ^ ^ TRANSMIT CLOCK INT, EXT, RX &X, &X1,

&X2

^ ^ ^ LINE TYPE LEASE, DIAL &L1, &L2,&L S2

^ DIAL LINE

TRANSMIT LEVEL

-9 to -21 dBm *TDn (n=9-21)

^ JACK TYPE PER - RJ11

PROG - RJ45

%Z1

---

^ ^ ^ LINE CURRENT

DISCONNECT

OFF, 8 MS,

90 MS

*LC, *LC1,

*LC2

^^ ^ LONGSPACE

DISCONNECT

ENABLE DISABLE

^ ^ ^ V.22 GUARD TONE DIS, 550,

1800 Hz

&G, &G1,

&G2

^^ (leased only) 2-WIRE/4-WIRE 2-WIRE/4-

WIRE

&L1, &L2 S3

<C#>-10 V.3229 / V.3229L

Option Selection

Table 3-1 Cont.

Menu Options

^ ^ ^ DIAL BACKUP MANUAL,

AUTO

*DB, *DB1 S3

^ ^ ^ LOOKBACK TIMER OFF, 15, 30,

45, 60 MIN

--- S2 8

^ ^ ^ LL TRANSMIT LEV-EL0 to -21 dBm *TLn S5

^ CHANGE

PROTOCOL OPTIONS?

(async only)

LAPM PROTOCOL ENABLE

DISABLE

\N4, \N5,

\N6, \N7

\N, \N1,

\N2, \N3

^ ^ ^ MNP PROTOCOL ENABLE

DISABLE

\N2, \N3,

\N6, \N7

\N, \N1,

\N4, \N5

^ ^ ^ PROTOCOL

FALLBACK

ENABLE

DISABLE

\N3, \N5,

\N6, \N7

\N, \N1,

\N2, \N4

^ ^ ^ DATA COMPRES-

SION

DISABLE NORM TX RX

%C %C1 %C2 %C3

Tabl e 3:

M A

M E N U

SUBMENU SUBMENU ITEM ITEM

OPTION

AT COM-

MAND

S-

MODIFY CONFIGURA-TION? (cont.)

CHANGE PROTOCOL OPTIONS? (cont.)

BUFFER MODE NORMAL

DIRECT

\J1

---

^ ^ ^ DTE SPEED DTE=DCE

CONSTANT DTE

\J1

---

^^ ^ DTEFLOWCON-

TROL

DISABLE XON/XOFF CTS RTS/CTS

\Q \Q1 \Q2 \Q3

^ ^ ^ DCE FLOW CON-

TROL

DISABLE XON/XOFF CTS

\Q4 \Q5

\Q6, \Q7

^ ^ ^ XON/XOFF PASS

THROUGH

ENABLE DISABLE

\X1

---

Tabl e 2:

V.3229 / V.3229L <C#>-11

Option Selection

^ ^ ^ INACTIVITY TIMER OFF, 15, 30,

45, 60, 75, 90 MIN

--- S5 8

^ ^ ^ BREAKCONTROL 0,1,2,3,4,5 \K,\K1,\K2,

\K3, \K4, \K5S59

^ ^ ^ V.42 FAST DETECT ENABLE

DISABLE

\M1

^ ^ CHANGE DTE

OPTIONS?

OPERATION SYNC

ASYNC

&M1, 2, 3, 4,

^ ^ ^ DTE RATE (async) 57600, 38400,

19200,14400, 12000, 9600,

7200, 4800,

2400,1200, 300

--- S8 0

^ ^ ^ CHAR SIZE (async) 7 BIT

8 BIT

--- S6 1

^ ^ ^ PARITY (async) NO, EVEN,

ODD

--- S6 1

^^ ^ DIALMETHOD

(sync)

ASYNC, DTR, MANUAL, V.25 BISYNC, V.25 SDLC

&M1,&M2

&M3 &M4 &M5

^ ^ ^ AT COMMAND SET ENABLE

DISABLE

*NT1

*NT

^ ^ ^ CHARACTER TYPE

(V.25 only)

ASCII, EBCDIC --- ---

^^ ^ SDLCDATAFOR-

MAT

NRZ, NRZ1 --- ---

^ ^ ^ DTR RESPONSE IGNORE

RECALL CMD DISCONNECT RESET

&D &D1 &D2 &D3

^ ^ DSR STATE NORMAL

FORCED HIGH Off 5 SEC ON

DISCONNEC T FOLLOWS OH

&S1

&S2

&S3

Tabl e 3:

<C#>-12 V.3229 / V.3229L

Option Selection

Table 3-1 Cont.

Menu Options

Tabl e 4:

M A

M E N U

SUBMENU SUBMENU ITEM ITEM

OPTION

AT COM-

MAND

S-

MODIFY CONFIGURA-TION? (cont.)

CHANGE DTE OPTIONS? (cont.)

DCD STATE NORMAL

FORCED HIGH OFF 5 SEC ON

DISCONNECT FOLLOWS

REMOTE RTS

&C1

&C2

&C3

^ ^ ^ CTS STATE NORMAL

FORCED HIGH CTS FOLLOWS

DCD

CTS=RTS

&R &R1 &R2

&R9

^ ^ ^ RTS/CTS DELAY 0 to 150 ms

(10 ms increments)

--- S2 6

^ ^ ^ DTE COMMANDED

FALLBACK

ENABLE DISABLE

*FB1

*FB

^ ^ ^ OPTIONS RES/RET-

AT DISC

RESTORED RETAINED

*RO1

*RO

^ ^ CHANGE TEST

OPTIONS?

BILATERAL ANALOG

LOOP

ENABLE DISABLE

*AN1

*AN

^ ^ ^ BILATERAL DIGITAL

LOOP

ENABLE DISABLE

*DG1

^ ^ ^ DTE LOCAL TEST ENABLE

DISABLE

*LA1

*LA

^ ^ ^ DTE REMOTE TEST ENABLE

DISABLE

*RD1

*RD

^^ ^ REMOTECOM-

MANDED

ENABLE DISABLE

&T4 &T5

^ ^ ^ TEST TIMEOUT OFF, 60, 120,

180. 240 SEC

--- S1 8

^ ^ CHANGE DIAL

OPTIONS?

DIAL TYPE PULSE, TONE P, T S1

^ ^ ^ AUTODIAL # OFF, 1 - 9 *AUn

(n=1-9)

---

V.3229 / V.3229L <C#>-13

Option Selection

^ ^ ^ DIAL TONE BLIND DIAL

WAIT FOR DIAL

TONE

X, X1, X3

X2, X4

^ ^ ^ WAIT DELAY

(Blind Dial)

1, 2, 4, 8, 16, 32 SEC

--- S6

^ ^ ^ PAUSEDELAY 1,2,4,8,16,

32 SEC

--- S8

^ ^ ^ CALL TIMEOUT 15, 30, 45, 60,

75, 90, 105, 120 SEC

--- ---

^ ^ ^ ANSWERRING#X 1,2,4,8,16,

manual

--- S0

^ ^ ^ 801 V.32 TIMEOUT LONG, SHORT --- S5

^ ^ ^ AUTOCALLBACK ENABLE, DIS --- S7

Tabl e 4:

<C#>-14 V.3229 / V.3229L

Option Selection

Table 3-1 Cont.

Menu Options

SELECTING OPTIONS

Select options by pressing the YES or NO pushbutton in response to the LCD prompt. When first turned on, a main menu 1 message is displayed. Table 3-1 lists these messages. Pressing NO scrolls through

Tabl e 5:

M A

M E N U

SUBMENU SUBMENU ITEM ITEM

OPTION

COM-

MAND

S-

MODIFY CONFIGURA-TION? (cont.)

CHANGE SPEAKER OPERATION?

VOLUME CONTROL LOW

MEDIUM HIGH

L1 L2 L3

^ ^ ^ SPEAKER CON-

TROL

ON UNTIL CARRIER

DETECT ALWAYS ON OFF WHILE

DIALING ALWAYS OFF

M1 M2

^^ LOAD/STORE

OPTION SET?

LOAD FACTORY

OPTION

NO, 1-9 &Fn

(n=1-9)

---

^^ ^ LOADUSEROP-

TION

SET

1 2

---

^ ^ ^ STORE PRESENT

OPTIONS

1 2

&W1

---

^ ^ ^ USER OPTION

AT RESET

1 2

&Y1

---

CHANGE PHONE NUMBERS?

PHONE NUMBER NINE 31-CHAR

NUMBERS

&Zn

(n=phone#

and dial

modifiers)

*CNn,x (n=location x=phone #)

---

V.3229 / V.3229L <C#>-15

Option Selection

main menus 2 through 6. To return to main menu 1 press the TALK/DATA pushbutton.

DIAL STORED

PHONE #?

DISPLAY

STATUS

NO...

CHANGE

PHONE #?

Note: While operating in the option menu, pressing NO scrolls down the columns in Table 3-1 and pressing YES advances across the columns.

Main Menu

WhenanyMainMenuisondisplay,pressingYES advances to the first Submenu in that Main Menu group.

MODIFY

CONFIGURATION?

YES

CHANGE MODEM

OPTIONS?

<C#>-16 V.3229 / V.3229L

Option Selection

Submenu

When in a Submenu column, pressing NO scrolls down the Submenus; when the end is reached it returns to the MainMenufor that group of submenus.

CHANGE MODEM

OPTIONS?

NO...

LOAD/STORE

OPTION SET?

MODIFY

CONFIGURATION

In a Submenu column, pressing YES advances to the Submenu Item column.

CHANGE MODEM

OPTIONS?

YES

DCE

RATE

Submenu Item

To scroll through the Submenu Item column, press NO. At the end, pressing NO returns you to the Submenu header for that item group.

DCE

V.3229 / V.3229L <C#>-17

Option Selection

RATE

ORIG/FORCE

ANSWER

NO...

V.22 GUARD

TONE DISABLED*

CHANGE MODEM

OPTIONS?

When in a Submenu Items column, pressing YES advances through the options for that Submenu Item. The first option that appears is the currently selected option.

NORMAL ORIG.

FORCED ANSWER?

YES

FORCE ANSWER

NORMAL ORIG.?

* This is the last submenu item for modem options.

Item Option

When in the Item Option column, respond to the prompt question on the LCD to either keep or change the current option displayed.

<C#>-18 V.3229 / V.3229L

Option Selection

USE RECEIVE

TRANSMIT CLOCK?

USE EXTERNAL

TRANSMIT CLOCK?

USE INTERNAL

TRANSMIT CLOCK?

YES

INTERNAL CLOCK

CHANGE?

Selecting the Option

Select the submenu containing the option (submenu item) to be changed and press YES. The LCD displays the first Submenu Item.

If the Submenu Item (option) setting displayed is the desired option, press NO to scroll through Submenu Items. If the option displayed is not the desired setting, respond to the prompts until the desired option is displayed, and then advance to the next Submenu Item. In any case, responding to the prompt will guide you to the desired option.

Note: Because of menu structure and options available, not all Main Menus have Submenus and not all Submenus have Item Options. However, the option selection sequence is the same.

V.3229 / V.3229L <C#>-19

Option Selection

V.3229 / V.3229L <C#>-1

Operation

Chapter 4

Operation

GENERAL

This chapter contains a functional description of the modem.

CONTROLS AND INDICATORS

The front panel houses the LCD panel and LED indicators. The power switch is located on the rear panel.

LED DESCRIPTIONS

The LEDs display modem status during various operations. Two versions of the V.3229 contain two different LEDs. One version has a TR LED in the location where the other version has a QM LED. Definitions are as follows:

Terminal Ready

TR - lights when the associated DTE is ready to exchange data with the modem. This signal is input on EIA-232 pin 20.

Quality Monitor

QM - lights when poor signal quality produces a bit errorrateof1x10

or greater, or when error control

causes retransmission of data. This signal is output

<C#>-2 V.3229 / V.3229L

Operation

on EIA-232 pin 11.

Request to Send

RS-lightswhentheDTEisreadytosenddatatothe modem. This signal is input on EIA-232 pin 4.

Clear to Send

CS - lights when the modem is ready to accept data from the DTE. This signal is output on EIA-232 pin

Carrier Detect

V.3229 / V.3229L <C#>-3

Operation

CD - lights when the received audio carrier signal is detected or, if enabled, when error control negotiation is complete. This signal is output on EIA-232 pin 8.

Received Data

RD - lights for a space at the receive data output, indicating receive output data activity. This signal is output on EIA-232 pin 3.

Transmit Data

TD - lights for a space at the transmit data input, indicating transmit input data activity. This signal is input on EIA-232 pin 2.

TALK / DATA

Only on the L model, the TALK / DATA LED lights to indicate that the modem is in talk mode and goes off to indicate that the modem is in data mode.

POWERUP

A powerup procedure is not required. Turn the ON/ OFF power switch on the rear panel to ON.

Quick Startup Procedure

This procedure can help with first time operation of the modem. The procedure assumes that phone numbers have been inserted in memory, that an asynchronous dial-up option set is in effect, that power, DTE, and telephone line connections are made, and that a similar, remote station is available for communication.

¥Make sure the modem is installed according to the instructions in Chapter 2.

<C#>-4 V.3229 / V.3229L

Operation

¥Turn on the computer and the modem.

Manual Dialing

After turning the modem on the LCD shows the software version and advances to main menu 1.

¥Pick up the handset and dial the phone number of the remote modem. For the L model press the TALK / DATA button to enter talk mode.

¥When a remote modem answers a high pitched tone (2100 Hz answer back tone) is heard.

¥Press TALK/DATA. This puts the modem in data mode and data transfer can begin.

The display shows TRAINING as the modems negotiate a connection and then ONLINE when the connection is made. Data transfer is controlled by the user and begins when instructed.

Manual Answering

To manually answer the phone for conversation, set the autoanswer register (S0) to a ring count value high enough to allow answering by the connected phone before the modem autoanswers.

When the conversation is completed, both parties press TALK/DATA and a data connection is established.

Autodialing from the Front Panel

¥Starting at the V.32 bis 14400 TALK display, press NO. The display advances to DIAL STORED NUMBER?

¥Respond to the prompts until reaching the desired number to dial.

V.3229 / V.3229L <C#>-5

Operation

¥Press YES. The modem proceeds through the dial sequence.

To follow this sequence, observe the LCD and listen to the speaker.

AT Command Dialing

Enter ATD and the telephone number or memory location number to dial. When the enter key is pressed the dial sequence starts. Follow the status of the dial sequence by observing the monitor screen and listening to the speaker. .

Software Packages Communication

<C#>-6 V.3229 / V.3229L

Operation

A large variety of software packages compatible with the modem is available. Most provide a way for the operator to select options, insert phone numbers, and establish communications with a remote modem. Software package instructions describe the actions required for these functions.

ERROR CONTROL

The modem incorporates error control capabilities including LAPM and MNP protocols. Chapter 8 provides detailed explanations for error control.

FLOW CONTROL

If the DTE speed exceeds the DCE (modem) speed, characters may be sent by the DTE to the modem faster than it can send them to the remote modem. The modem holds characters in an internal buffer until they can be transmitted. When this buffer is full, the modem uses flow control to cause the DTE to stop sending characters. As the modem continues to transmit data and the buffer empties, flow control is again used to cause the DTE to resume sending data.

AUTOBAUD

Sending AT to the modem accomplishes autobaud. The modem can automatically detect DTE speed and adjust to communicate with the DTE at that rate (autobaud). The default is 9600 bps. Autobaud also detects the character size and parity used by the DTE. The default is 8 data bits, no parity, and one stop bit.

2- / 4-WIRE OPERATION

V.3229 / V.3229L <C#>-7

Operation

Note: For a 2- or 4-wire leased line connection to succeed one modem must be configured as forced answer and the other modem as normal originate. Both modems should have only one protocol, MNP or LAPM, enabled and PROTOCOL FALLBACK must be disabled. DCE line speed must be the same for both modems.

4-Wire Operation

In 4-wire operation, the modem is a full-duplex, leased line modem requiring a dedicated 4-wire leased line. Only point-to-point dedicated leased lines are supported.

A V.32 or V.33 training sequence may be selected for use during 4-wire leased line operation using S31. Refer to S31 in Chapter 6 for options.

The 4-wire leased line connects to the TELSET/ LEASED LINE jack on the modem rear panel. Dialing is not necessary. When connected via leased line the modems will train and begin communicating with each other. The DIAL jack can be used to connect a 2-wire PSTN line for dial backup.

2-Wire Operation

In 2-wire operation, the modem is a full-duplex modem able to operate over 2-wire leased or PSTN lines.

2-WIRE LEASED LINE OPERATION

The 2-wire leased line is connected to the TELSET/ LEASED LINE jack; the DIAL jack connects to a 2wire PSTN line for dial backup. The leased line connects the local and remote modems directly and dialing is not necessary. One of the modems must be configured for forced answer. When connected via

<C#>-8 V.3229 / V.3229L

Operation

leased line the modems connect and begin communicating with each other.

Note: DTRmustbeheldhighin2-wireleasedline operation. This is accomplished by DTE control, wiring pin 20 of the digital interface cable high, or by selecting the option IGNORES DTR. If DTR is terminal controlled, loss of synchronization can be corrected by cycling DTR. This causes the modem to initiate the 2-wire training sequence.

V.3229 / V.3229L <C#>-9

Operation

2-WIRE DIAL-UP OPERATION

Connection to the telephone network is through the DIAL jack. A standard telephone can be connected to the TELSET/LEASED LINE jack for manual dialing.

CONFIGURATION PROFILES

Modem operations are controlled by option settings selected from factory defaults stored in ROM, active settings stored in RAM, and custom settings stored in nonvolatile memory. These three code storage locations are called profiles. Chapter 5 includes commands for profile storage and recall.

Active Profile

The active profile holds the current option settings and is used by the modem for all operations and functions. Any active profile option can be changed to meet an immediate requirement.

Stored Profile

When an active configuration is established that meets all operating requirements, it can be transferred to one of the stored profiles. Two stored profiles are available for greater versatility.

If the active profile has been temporarily changed it can be reset to either of the stored profiles with the ATZ command. Another AT command selects one of the stored profiles to be the powerup profile.

Factory Profile

The factory configurations are stored in ROM and cannot be changed by the user; they can be trans-

<C#>-10 V.3229 / V.3229L

Operation

ferred to the active profile and then modified to fit a specific application if needed.

V.3229 / V.3229L <C#>-11

Operation

REMOTE CONFIGURATION

This mode of operation allows viewing or modifying the options of a remote modem that supports Motorola UDS remote configuration. Remote configuration is initiated by the local (master) modem through a routine incorporating remote digital loopback, a security code, and an acknowledgment from the remote (slave) unit to be modified. The security code is user programmable and provides protection from unauthorized entry. The modems are shipped from the factory without a security code. Refer to Remote Configuration in Chapter 5.

The ATD and AT&T commands are not accepted in remote configuration.

Note: Remote configuration is supported at all rates except 300 bps.

Remote Configuration Security

The correct code must be received by the remote modem before remote configuration can be established. Once established, the local DTE becomes a virtual terminal and can serve both local and remote modems. After starting remote configuration, the local DTE serves the remote modem.

To return DTE service to the local modem while in remote configuration, issue the +++ escape sequence.

<C#>-12 V.3229 / V.3229L

Operation

DTE service can again be returned to the remote modem by issuing the ATO command. Switching DTE service between local and remote modems may be performed as needed.

To exit remote configuration, return DTE service to the local modem. The AT&T command will exit remote configuration mode.

V.3229 / V.3229L <C#>-13

Operation

Remote configuration may be entered after dialing by placing the remote configuration command (%T=), without the = sign and followed by the security code, at the end of the dial string.

SECURITY OPERATION

Security operation provides password protection against unauthorized dial-up access. The security feature can be enabled / disabled with AT commands when operating on a dial-up system.

Transmitted data and received data lines are suppressed to the host DTE during security validation; all other signals (CTS, DSR, RI, etc.) operate as selected. After the password has been validated, the modem operates normally.

Operating without Security

The modem is not factory set for security and operates like a standard V.32, except for additional AT command which allow access to security. With these commands a user can set passwords and turn security on. When security is enabled, a password must be used to change security options.

Operating with Security

A secure modem will not allow data transfer between its host and a remote host until a correct password is received from the calling party. If an incorrect password is received the secure modem disconnects. The front panel is not locked out because this type of security prevents unauthorized dial-up access.

Remote Operation

The originating modem must transmit the correct

<C#>-14 V.3229 / V.3229L

Operation

security code before the secure modem will allow data transfer. If accessing a secure remote modem, the local modem prompts the user with

PLEASE ENTER YOU PASSWORD ⇒

Respond to the password prompt

Enter

$ followed by the password.

V.3229 / V.3229L <C#>-15

Operation

After receiving the $ the secure remote modem accepts the security code and waits for a carriage return. Entering more than ten characters is invalid and causes the secure modem to disconnect. Entering a valid password causes the calling party's DTE to display PASSWORD ACCEPTED.

Local Operation

When accessing the local modem, the password is not required except when the user wants to change a security option. To change a password or turn security on or off, the user must enter a password when entering the appropriate AT commands. EIA-232 signals to the DTE are not affected by security in command mode.

Passwords

Two passwords of up to ten characters each can be stored in the modem's nonvolatile memory. AT commands change the passwords. Backspace and escape keys are not supported for password entry. The passwords can consist of any printable characters except a dollar sign, a comma, or space. Passwords are case sensitive.

The passwords have the same priority level and are interchangeable with each other. This can be helpful in situations such as when the user forgets one of the passwords.

LCD Indication Security

The front panel LCD indicates whether security is on or off. If disabled, the LCD appears as if the security does not exist. If enabled, main #1 consists of the following display:

<C#>-16 V.3229 / V.3229L

Operation

SECURE 14400

xxx

V.3229 / V.3229L <C#>-17

Operation

Restrictions in Security Operation

The following conditions will cause the modem to disconnect:

¥An error control protocol is not in effect ¥Illegal password attempt ¥Connection is 300 bps ¥Connection is synchronous

These restrictions apply only when security is enabled.

AUTOCALLBACK SECURITY

Another security feature, Autocallback, forces the answering modem to dial the selected autodial (AT*AUn) telephone number after answering a call, holding the line for one second, and then disconnecting. When autocallback is enabled the modem will not train on an incoming call. Access autocallback via Main Menu #5 on the LCD. Refer to Chapter 3 for further information. S-register 72 enables / disables autocallback. S-register 78 determines the delay in seconds before autocallback is initiated.

DIAL BACKUP

Dial backup allows the modem to switch to a dial backup mode if the data connection on the leased line becomes unacceptable for communications. This can be accomplished in two ways:

<C#>-18 V.3229 / V.3229L

Operation

¥Automatic - backup due to extended loss of carrier or 4 unsuccessful retrains in 3 minutes

¥Manual - user determined using front panel controls or AT commands

Note: In 4-wire leased line operation, if both units have autodial backup enabled, one must be configured for forced answer. This prevents both units from dialing if the leased line fails.

Both methods use the prestored autodial number. If the dial attempt is unsuccessful after three tries, a retrain on the leased line will be initiated.

In automatic and manual mode the return to leased line is initiated after the lookback time in register S28 has elapsed. In automatic mode unnecessary termination of the dial line connection is prevented by a leased line lookback test. If the leased line is not acceptable, the dial connection is resumed with a retrain. If the leased line is acceptable, the dial connection is dropped and normal leased line mode is resumed. If return to lease line is manually invoked in manual dial backup mode the dial line is dropped immediately.

When the unit attempts to return to leased line, the LCD displays LEASE LOOKBACK. If the leased line has been restored to service, data can be passed approximately 10 seconds after LEASE LOOKBACK was initiated. The LCD will continue to display LEASE LOOKBACK for slightly more than a minute. When the LCD displays ON LINE again the dial line is disconnected.

Note: A diagnostic test initiated during dial backup

V.3229 / V.3229L <C#>-19

Operation

mode terminates when the modem performs leased line lookback.

AUTO RATE RENEGOTIATION

Auto rate renegotiation allows the modem to automatically decrease the DCE rate when the allowable bit error rate is exceeded. If line condition improves the modem automatically increases the rate.

Select this feature by front panel operation or AT command. Options include disabled (factory default), low (BER= 1 in 10^5), medium (BER= 1 in 10^4), high (BER= 1 in 10^3).

The following apply to auto rate renegotiation:

¥Auto retrain is disabled when auto rate renegotiation is enabled.

¥Auto rate renegotiation is disabled during direct mode.

¥Manual rate renegotiation is disabled from the front panel when auto rate renegotiation is enabled.

¥Only one increment or decrement in the DTE rate is allowed at a time during auto rate renegotiation.

¥When online, initiator rate renegotiation occurs a maximum of every 12 to 14 seconds from the last occurrence of a rate renegotiation.

¥After the modem drops data rate because of poor signal quality, the line must improve by approximately 2.5 dB before an increase in rate can occur.

PLACING A CALL

<C#>-20 V.3229 / V.3229L

Operation

Using a Standard Telephone

¥Lift the telephone receiver. Wait for the dial tone. With the L model enable talk mode by pressing the TALK / DATA button.

¥Dial the number of the remote site.

¥When the answer back tone is heard, immediately press the TALK/DATA button and hang up the phone. The modems go through a connection sequence and establish a data link. If not, hang up and return to the first step.

V.3229 / V.3229L <C#>-21

Operation

Autodial fromFront Panel

¥Advance the LCD to main #2, DIAL STORED NUMBER.

¥Select the stored number to dial and press YES to dial.

Autodial with the AT Command Set

¥To dial a number, for example 5551212 type AT D 555-1212 carriage return, or enter ATD Sn where n equals the stored telephone number location (1-9) to dial.

¥The modem dials the number -- either pulse or tone, whichever is currently in effect -- and takes the role of the originate modem.

Refer to the DIAL COMMANDS section in Chapter 5 for additional information.

ANSWERING A CALL

Autoanswer

Normally the modem is configured to autoanswer. A telephone plugged into the telset jack will also ring.

Manual Answer

On ring detection the modem displays:

V.32b 14400

<C#>-22 V.3229 / V.3229L

Operation

RINGING

Press TALK/DATA to answer the call or enter the ATA command at the DTE.

ENDING A CALL

The following conditions cause call termination:

¥Abort Disconnect (No answer, busy signal, no modem, etc.)

Default 30 sec. Select 1

to 30 sec.

¥ATH

Disconnect command.

¥Loss of Carrier Disconnect

Select 100 ms to 25.5

sec.

¥Receive Long Space Disconnect

Disable or enable.

¥DTR Disconnect

Disable or select 10 ms

to 2.55 sec.

¥LCD Display

When TALK/DATA is pressed, the LCD displays DO YOU WANT

V.3229 / V.3229L <C#>-23

Operation

TO DISCONNECT? When YES is pressed the modem hangs up. Pressing NO displays SWITCH TO TELSET (TALK MODE)? Pressing YES turns the connection over to the connected telephone.

¥Protocol Link Establishment Failure

Reliable mode only. Failure to establish reliable link.

¥Protocol Inactivity Timeout

Default (0) disabled. Select disable or 1 to 255 minutes.

¥Protocol Retry Limit Exceeded

12 retransmissions of the frame.

¥Signal Quality

Leased line operation with dial backup enabled; extended loss ofcarrieror4unsuccessful retrains in 3 minutes.

¥Modem power is turned off.

<C#>-24 V.3229 / V.3229L

Operation

V.3229 / V.3229L <C#>-25

Operation

V.32 Cleardown

<C#>-26 V.3229 / V.3229L

Operation

V.32 cleardown is a method of call termination specified in the CCITT recommendation. Cleardown incorporates a training sequence which ends with a command to disconnect. If long space disconnect is disabled, the cleardown sequence is activated by the ATH command or by any method of disconnect request.

V.3229 / V.3229L <C#>-27

Operation

V.3229 / V.3229L <C#>-1

Asynchronous Operating Commands

Chapter 5

Asynchronous Operating Commands

GENERAL

This chapter describes the AT commands used to select options and to operate and test the modem.

COMMAND CATEGORIES

The modem offers eight major categories of command statements:

¥Response ¥Dial ¥Terminal Interface ¥Test ¥General ¥Configuration ¥Security ¥Protocol

OPERATION MODES

During asynchronous operation the modem functions in one of three modes:

¥Offline Command Mode ¥Online Command Mode ¥Data Mode

Offline Command Mode

In offline command mode (generally referred to as command mode), the modem communicates with the computer or terminal. Commands can be entered

<C#>-2 V.3229 / V.3229L

synchronous Operating Commands

separately or in strings. There is no data communicationlinkestablishedinthismode.

Online Command Mode

This mode is entered from the data mode after the escape command has been entered. The data communication link remains established but data transmission is suspended. The modem will now accept commands like it does in the offline command mode.

Data Mode

The modem goes to data mode (online) after it acknowledges the proper signal and successfully connects with a compatible modem. In data mode, the modem sends and receives data, but will not accept or execute command instructions.

SENDING COMMANDS TO THE MODEM

When the computer, modem, and monitor are on, an instruction can be sent to the modem telling it what function or activity to perform. The instruction, called a command statement, command string, or just command, is typed using the computer keyboard. The command statement temporarily resides in a section of memory called the command buffer.

Each command statement is made up of characters, numbers, and such keyboard symbols as the & and % signs. Commands must be written in a specific form so the modem recognizes and follows the instruction.

Creating a Command Statement AT

V.3229 / V.3229L <C#>-3

Asynchronous Operating Commands

To create a command statement use the following steps:

¥Type AT. This is the Attention Code telling the unit a command statement follows. ¥Type the command. ¥Press the return key to "Enter" or send the command statement to the modem.

An example of a command statement using the dial command (D) follows.

ATD555-1212

This statement can be read as:

Attention: Dial 555-1212.

Another example is:

Enter ATZ.

This means Attention: execute the Z command.

After entering a command line the modem returns a response message. If the command is accepted "OK" is returned. If the command is not accepted "ERROR" is returned

To clear command statements from the buffer perform one of the following:

¥Turn the modem off ¥Enter AT ¥Use the DTR reset feature.

Autobaud

The attention code (AT) is analyzed by the modem to determine the transmission speed, parity, and bits per character used by the DTE. This autobaud process is repeated each time the AT command prefix is sent.

<C#>-4 V.3229 / V.3229L

synchronous Operating Commands

Guidelines for CreatingCommand Statements

When typing command statements, note the following:

¥The attention code (AT) may be upper or lower case but not a combination like aT. ¥Return must be pressed to execute (Enter) a command. ¥The command buffer can hold 40 characters. ¥Use the backspace or delete key to erase the last character.

Even though the initial AT code must be all upper or lower case, characters that follow can be any mix of upper and lower case.

Monitor Display

V.3229 / V.3229L <C#>-5

Asynchronous Operating Commands

As commands are typed they appear on the monitor so the operator can verify the input. This is called local character echo. The echo may be turned on or off using AT commands. Refer to Local Character Echo in the General Commands section of this chapter for details.

Command Buffer

The modem temporarily stores up to 40 characters in the command buffer. If this limit is exceeded, the modem does not accept the command and sends an ERROR message. To correct this condition, retype the command using 40 characters or less.

The AT characters and punctuation used in telephone numbers do not take up space in the buffer. Also, blank characters used as spaces to help increase readability are not counted. For example, the modem reads the commands

ATD (212) 555-1212 ATD2125551212 ATD 212 555 1212

as having 11 characters each. Commands can be typed in any of these forms.

Backspace Key

Use the backspace key to change the command statement or correct errors. The backspace key allows the cursor to be moved back to the character(s) in error. The command can then be retyped from that point.

Example: ATD5551211 has been typed. To change the last 1 to 2, press the backspace key once, type 2, and press return to execute the command.

Repeating a Command A/

<C#>-6 V.3229 / V.3229L

synchronous Operating Commands

This command tells the modem to repeat the last command stored in its buffer. It automatically reexecutes the command without retyping. The return key does not need to be pressed.

V.3229 / V.3229L <C#>-7

Asynchronous Operating Commands

Example: The ATD5551212 command has been executed, and the phone is busy. To repeat the instruction type A/ , but do not use AT before this command as AT would empty the buffer and there would be no command to repeat.

Numbered Commands

Series of commands that start with the same letter are distinguished by a number following the letter.

For example, the M0 command selects speaker always off, M1 speaker on until carrier detected, and M2 selects speaker always on.

In all cases, the zero (0) may be omitted so the commands M and M0 are identical.

For clarity, this manual uses the nonzero form of commands. The modem treats both the same but zeros count against the buffer total.

Group Commands

A group of commands can be typed in a single command statement. Pressing the return key sends the entire command string to the modem, which executes each command individually in the order it appears in the command statement reading from left to right.

For example, the command statement ATQ0V0L3DT5551212 means

¥AT Attention. ¥Q Allow response messages to be sent. ¥V Select digit code responses. ¥L3 Select high volume. ¥DT Tone dial 555-1212.

Response

ommands,Cont.

<C#>-8 V.3229 / V.3229L

synchronous Operating Commands

The modem executes the AT command followed by theQ,V,L,D,andTcommands. ATQ0V0L3DT5551212 can be read as ATQVL3DT5551212. Eliminating zeros reduces the number of characters, allowing more room in the buffer.

Response

ommands,Cont.

V.3229 / V.3229L <C#>-9

Asynchronous Operating Commands

The dial D command initiates the dial process so no other commands, only dial modifiers, can follow it.

RESPONSE COMMANDS

The modem communicates with the operator through response messages. These appear on the monitor or a computer printout to show the result of the command or action executed. Response messages can appear as words or numbers.

Digit / Word Selection V

V tells the modem which type of response message to show on the monitor. Some software requires digit response messages but words are easier to remember.

*default

Response Displays Q

The Q command enables or disables response messages. The modem still responds to commands when the response display is inhibited.

Tab le 1:

V Enables digit response messages

V1 Enables word response messages*

Tab le 2:

Command Operation

ResponseCommands,Cont.

<C#>-10 V.3229 / V.3229L

synchronous Operating Commands

*default

Q Response display on *

Q1 Response display off

Q2 Response display on in originate

mode only

Tab le 2:

ResponseCommands,Cont.

V.3229 / V.3229L <C#>-11

Asynchronous Operating Commands

Response messages may be sent to the DTE at the DTE rate or the current DCE rate. Refer to S39 in Chapter 6 for further information.

Call Progress and Connect Speed Displays X

The X command selects connect / message displays and dialing options such as call progress monitoring, busy signal or dial tone detection and blind dialing.

*default

X followed by a dial command causes the modem to go off hook, wait the amount of time set in register S6, and dial the number. If connection is made the modem returns a CONNECT (code 1) message to the screen regardless of the speed of connection. With a basic response, the modem will not detect a busy or no dial tone condition.

Tab le 3:

X Dial tone and busysignal detection not

selected; CONNECT (code 1) response messages displayed for all speeds

X1 Dial tone and busy signal detection

not selected; appropriate CONNECT response messages or codes displayed for data rate

X2 Dial tone detection only; NO DIAL

TONE message or code appears if dial tone not detected within 5 sec

X3 Busy signal detection only; BUSY

message or code appears if dialed number is busy

X4 Dial tone and busy signal detection;

appropriate CONNECT message or code displayed *

ResponseCommands,Cont.

<C#>-12 V.3229 / V.3229L

synchronous Operating Commands

X1 followed by a dial command causes the modem to go off hook, wait the amount of time set in register S6, and dial the number. If connection is made the modem returns an appropriate CONNECT message or code to the screen. The modem will not detect a busy or dial tone signal.

X2 followed by a dial command causes the modem to go off hook and wait for a dial tone before dialing. If a dial tone is not detected within 5 seconds, the modem sends a NO DIALTONE message and hangs up. The modem will not detect a busy signal in this mode.

X3 followed by a dial command causes the modem to go off hook, wait the amount of time set in register S6 and dial the number. If a busy signal is detected, the modem sends a BUSY message and hangs up. If the call is completed, the appropriate CONNECT message similar to X1 will be displayed. The modem will not detect a dial tone signal.

X4 followed by a dial command causes the modem to go off hook and wait for a dial tone before dialing. If a dial tone is not detected within 5 seconds, the modem returns a NO DIALTONE message and hangs up. If a busy signal is detected, the modem returns a BUSY message and hangs up. If the call is completed, the appropriate CONNECT message similar to X1 will be displayed.

The X4 command combines all the features of X1, X2, and X3. The factory setting is X4.

Note: When an X2, X3, or X4 command is in effect,

an appropriate CONNECT data rate message or code is displayed as for X1. When a blind dial command (X, X1, X3) is in effect, the modem waits 2 seconds or the time set by S6 and then dials.

V.3229 / V.3229L <C#>-13

Asynchronous Operating Commands

Number Code Application *RC

Some communications software packages use different number codes to indicate the data rate of the serial port. This option selects either of two commonly used number code sets.

default is *RC

Note: Asterisks in AT commands are part of the command and do not indicate footnotes.

Response Number Codes / Messages

Tabl e 4:

Command Code

Set

Num-

ber

Operation

*RC Stan-

dard

15 4800 bps

^ ^ 18 9600 bps

*RC1 Alter-

nate

11 4800 bps

^ ^ 12 9600 bps

DialCommands,Cont.

<C#>-14 V.3229 / V.3229L

synchronous Operating Commands

Response number codes, messages, and their corresponding meanings are listed in Table 5-1. CONNECT messages may be selected for output to the DTE at the DTE or DCE rate. If register S39 bit 5 is set to 0, the CONNECT message is sent at the DTE rate; if 1, the message is sent at the DCE rate.

Table 5-1

Response Messages

Tabl e 5:

Code Message Meaning

0 OK Command received

1 CONNECT Connect at 300 bps while X1, X2, X3, or X4

command in effect; all rates while X command in effect

2 RING Ring detected

3 NO CARRIER Valid carrier is not detected after call attempt

within period specified by register S7, or carrier lost for value of S10 or more

4 ERROR Command not recognized or too long

5 CONNECT 1200 Connection made at 1200 bps

6 NO DIAL TONE No dial tone detected for 5 seconds

(X2 or X4 command in effect)

7 BUSY Dialed number busy

(X3 or X4 command in effect)

9 CONNECT 7200 DTE rate 7200 bps

10 CONNECT 2400 DTE rate 2400 bps

11, 15 CONNECT 4800 DTE rate 4800 bps

12, 18 CONNECT 9600 DTE rate 9600 bps

13 CONNECT 12000 DTE rate 12000 bps

14 CONNECT 19200 DTE rate 19200 bps

16 CONNECT 38400 DTE rate 38400 bps

17 CONNECT 14400 DTE rate 14400 bps

19 CONNECT 57600 DTE rate 57600 bps

20 CONNECT 0300/REL MNP 300 bps connection

DialCommands,Cont.

V.3229 / V.3229L <C#>-15

Asynchronous Operating Commands

Table 5-1, Cont.

Response Messages

22 CONNECT 1200/REL MNP 1200 bps connection

23 CONNECT 2400/REL MNP 2400 bps connection

24 CONNECT 4800/REL MNP 4800 bps connection

25 CONNECT 9600/REL MNP 9600 bps connection

26 CONNECT 19200/

REL

MNP 19200 bps connection

Tabl e 6:

Code Message When Displayed

27 CONNECT 38400/

REL

MNP 38400 bps connection

28 CONNECT 7200/REL MNP 7200 bps connection

29 CONNECT 12000/

REL

MNP 12000 bps connection

30 CONNECT 14400/

REL

MNP 14400 bps connection

31 CONNECT 57600/

REL

MNP 57600 bps connection

36 CONNECT 1200/

LAPM

LAPM 1200 bps connection

37 CONNECT 2400/

LAPM

LAPM 2400 bps connection

38 CONNECT 4800/

LAPM

LAPM 4800 bps connection

39 CONNECT 9600/

LAPM

LAPM 9600 bps connection

40 CONNECT 14400/

LAPM

LAPM 14400 bps connection

41 CONNECT 19200/

LAPM

LAPM 19200 bps connection

42 CONNECT 38400/

LAPM

LAPM 38400 bps connection

43 CONNECT 12000/

LAPM

LAPM 12000 bps connection

Tabl e 5:

DialCommands,Cont.

<C#>-16 V.3229 / V.3229L

synchronous Operating Commands

Note: Connect rates indicate DTE speed.

44 CONNECT 7200/

LAPM

LAPM 7200 bps connection

45 CONNECT 57600/

LAPM

LAPM 57600 bps connection

Tabl e 6:

V.3229 / V.3229L <C#>-17

Asynchronous Operating Commands

DIAL COMMANDS

Dial commands let the modem originate a call to another modem. These commands can be used with either tone or pulse dial telephone systems. Commands for call answering are included at the end of this section.

Dialing D

Dial a number, for example 555-1212

Enter

AT D 555-1212

The modem dials the number, either pulse or tone, whichever is currently in effect, and takes the role of the originate modem.

Use spaces, hyphens, parentheses, or other punctuation except dial modifiers to make the command line easier to read and enter. For example, these are all treated the same:

AT D 1-800-555-1212 AT D 1 (800) 555-1212 ATD18005551212

The dial modifiers are shown in Table 5-2.

Table 5-2

Dial Modifiers

Tab le 7:

Command Operation

<C#>-18 V.3229 / V.3229L

synchronous Operating Commands

T Tone dialing*

P Pulse dialing

, Insert a long pause (2 sec or value in

S8)

W Wait for 2nd dial tone

! Flash (1/2 sec)

R Switch to answer mode after dialing

T insert a T in the dial command.

AT D T 323-

1111P

insert a P in the dial command

AT D P 555-

9902,

use a comma. This inserts a 2 second delay (or the value in register S8).

AT D P 9 1-800-555-1000

Here the

modem

pulse dialsa

pauses for the telephone system to switch to an outside line

then dials

the phone

number. Comma

pauses may

be inserted

consecu-

tively if de-

sired.W

wait up to 30 seconds (time specified by S7) for a second dial tone.

Hook Flash!enter an exclamation mark.

AT D T 9W

323-8000 ,!,

#7 377

usually for transferring a call or similar use.

In this ex-

ample

the modem tone dials a 9

waits for the

second dial

tone

dials the phone number

pauses flashes to start the transfer

pauses

twice

then uses #7 to transfer the call to extension 377.

Tab le 7:

TerminalInterfaceCommands,Cont.

V.3229 / V.3229L <C#>-19

Asynchronous Operating Commands

Switching to

Answer

Mode after

Dialing

use an R at the end of the dial sequence.

AT D 555-

2345 R;

place a semicolonat the end of the dial string.

AT D 234-

5678 ;@

use the @ command.

AT D 399-

4700 @

2251 ;

after the connection waits for 5 seconds. The modem then sends service code 2251 and returns to command mode for further input.

For example you might enter a dollar amount for a

banking transaction by entering

AT D 1400 ; according to the requirements of the

banking service.

Dialing a

Stored

Command

Line

Telephone

enter ATDSn where n represents a stored telephone number location between 1 and 9.

AT D

S9*AUn

which is used for any autodial application.

Voice Calls dial the number with the telephone. To

use the dial command for the call

AT D (num-

ber) ;

place the modems at both ends in DATA mode by pressing the TALK / DATA button.

ANSWER-

ING A CALL

answer by pressing the TALK/ DATA button.

AT Com-

mand An-

swer

AS0

the modem automatically answers on the selected ring and connects with the calling modem.

Note: If the

modem is

set to re-

spond to

DTR

the DTR signal must be on for autoanswer to work.

Detect

enter AT&C1. Some terminals and other devices require DCD on in order to communicate with the modem; if so

Tab le 7:

TerminalInterfaceCommands,Cont.

<C#>-20 V.3229 / V.3229L

synchronous Operating Commands

*default

AT&C3 must be enabled on both modems and synchronous or direct mode must be in effect for simulated switched carrier operation.

Data Set Ready &S

These commands control the DSR signal generated by the modem to indicate that the modem is ready for operation. DSR must be on for some terminals and devices to communicate with the modem.

select &C. DIMENSION(IN)

COL-

WIDTHS(1.

0000,2.710

WIDTH(5.4992)

BE-

LOW(.0005)

HGUTTER(.0555)

VGUT-

TER(.0555)

BOX(Z_DOUBLE)

HGRID(Z_S

INGLE)

VGRID(Z_SINGLE)

KEEP(OFF) ALIGN(RT)

L2(R1C0..R

1C2)

TABLE HEADING

Command Operation

&C DCD always on*

&C1 DCD is on when the modem recogniz-

es remote modem carrier or, if enabled, when protocol negotiation is complete

&C2 DCD on except for 5 seconds after

disconnect

&C3 DCD follows RTS on remote modem.

(Simulated switched carrier

Tab le 7:

TerminalInterfaceCommands,Cont.

V.3229 / V.3229L <C#>-21

Asynchronous Operating Commands

*default

Tab le 8:

Command Operation

&S DSR always on*

&S1 DSR on when off hook in data mode

&S2 DSR off for 5 seconds afterdisconnect

then returns to on

&S3 DSR follows off hook (OH) signal

<C#>-22 V.3229 / V.3229L

synchronous Operating Commands

Data Terminal Ready &D

In data mode DTR may be used for modem control.

*default

Note: If DTR controls dialer is selected, then selecting DTR active will cause an autodial after an off-toon transition of DTR.

Serial Port Ring Indicator (Pin 22) \R

\R determines how the ring indicate signal operates on pin 22 of the EIA-232 DTE connector.

Tab le 9:

Command Operation

&D The modem ignores DTR.*

&D1 The modem goes to command mode

from data mode when DTR goes from on to off.

&D2 Disconnects when DTR goes from on

to off; disables autoanswer while DTR is off

&D3 Disconnects,recalls command mode,

and resets the modem to a stored configuration when DTR goes from on to off

In dial line mode the modem disconnects; in leased line, the modem retrains.

TestCommands,Cont.

V.3229 / V.3229L <C#>-23

Asynchronous Operating Commands

*default

Request to Send / Clear to Send &R

When the modem is operating in nonbuffered mode (direct mode) or in synchronous mode, AT&R enables the RTS to CTS delay determined by the value in S26. AT&R1 forces CTS high and the modem ignores RTS (default). With AT&R2 selected CTS goes high when carrier is detected. AT&R9 forces CTS to follow the state of RTS without delay.

*default

Note: RTS/CTS delay is not valid in buffered mode or with error control enabled.

Table 10:

Command Operation

\R Causes ring indicate signal on pin 22

to turn on (high) during each ring and remain on during the call

\R1 Causes ring indicate signal on pin 22

to turn on (high) during each ring and turn off (low) when the call is answered*

Tab le 11 :

Command Operation

&R Enables RTS to CTS delay

&R1 CTS forced on*

&R2 CTS follows DCD

&R9 CTS equals RTS

<C#>-24 V.3229 / V.3229L

synchronous Operating Commands

Note: With AT&R2 selected, XON/XOFF is the only valid method of flow control and &C and &C1 are the only valid carrier detect options.

eneralCommands,Cont.

V.3229 / V.3229L <C#>-25

Asynchronous Operating Commands

DTE Controlled Fallback Rate (Pin 23) *FB

Pin 23 of the EIA-232 DTE connector provides a signal input to the modem for DTE fallback. If the modem is not using DTE fallback, set this option to ignore pin 23. To cause the modem to act on high / low levels of pin 23, enable this option. Negative level forces a higher rate for primary data rate; positive forces a lower rate providing a fallback rate.

*default

Table 12:

Command Operation

*FB Ignore pin 23*

*FB1 Transition on pin 23 changes speed

eneralCommands,Cont.

<C#>-26 V.3229 / V.3229L

synchronous Operating Commands

TEST COMMANDS &T

Diagnostic tests are used to isolate faults in the communications path. Diagnostic tests will terminate after the period of time specified by S18. If S18 is set to 0, the timer is disabled and tests will run continuously. Tests may also be terminated by the AT&T command. When in test modes without test pattern, issue the escape sequence +++ to return to command mode before terminating the test with the AT&T command. Refer to Appendix C for test procedures.

Table 13:

Command Operation

&T Terminate any test

&T1 Initiate local analog loopback test

&T2 Initiate remote analog loopback test

&T3 Initiate local digital loopback test

&T4 Grant remote requested digital loop-

back*

&T5 Deny remote requested digital loop-

back

&T6 Initiate remote digital loopback test

&T7 Initiate remote digital loopback with

test pattern

&T8 Initiate local analog loopback test with

test pattern

&T9 Initiate remote analog loopback with

test pattern

%T Transmit test pattern

eneralCommands,Cont.

V.3229 / V.3229L <C#>-27

Asynchronous Operating Commands

*default

Note: Local analog loopback with or without test pattern is the only test available in error control mode.

Bilateral Test Enable / Disable *AN *DG

Enable or disable bilateral test functions.

*default

DTE Controlled Remote Digital Loopback (Pin 21) *RD

To enable DTE controlled remote digital loopback, enter AT*RD1. Enabled, the modem goes into remote digital loopback when it detects an off-to-on transition of pin 21 while in the online data mode. Test ends when it detects an on-to-off transition of pin 21 and the modem returns to online data mode. To disable this function enter AT*RD.

Table 14:

Command Operation

*AN

*AN1

Bilateral analog loop disabled* Bilateral analog loop enabled

*DG

*DG1

Bilateral digital loop disabled* Bilateral digital loop enabled

eneralCommands,Cont.

<C#>-28 V.3229 / V.3229L

synchronous Operating Commands

*default

DTE Controlled Local Analog Loopback (Pin 18) *LA

To enable DTE controlled local analog loopback test, enter AT*LA1. Enabled, the modem goes into local analog loopback when it detects an off-to-on transition of pin 18. Test ends when it detects an on-to-off transition of pin 18. To disable, enter AT*LA.

*default

GENERAL COMMANDS

These commands control various standard options that in most cases apply to any mode of operation.

Changing from Data Mode to Command Mode +++

Table 15:

Command Operation

*RD Ignore pin 21*

*RD1 RDL enabled (pin 21)

Table 16:

Command Operation

*LA Ignore pin 18*

*LA1 LAL enabled (pin 18)

eneralCommands,Cont.

V.3229 / V.3229L <C#>-29

Asynchronous Operating Commands

To exit data mode and go to online command mode, press the escape character three times (+ is the default). Pause for the length of time set by register S12 (1 second is the default) before and after the +++ to ensure the modem recognizes the escape command.

This sequence temporarily suspends data transmissions and allows command mode operations without disturbing the telephone line connection. The modem responds with OK when it detects the escape code. Return to data mode by entering ATO.

Note: The AT command set must be enabled.

Local Character Echo E

Type AT without a carriage return. If the screen shows AT character echo is correct. Proceed with other commands as desired.

If the screen shows AATT enter the ATE command to correct the double characters or disable the local echo on the terminal.

If the screen shows no characters, type ATE1 to turn the echo on or enable local echo on the terminal.

*default

Table 17:

Command Operation

EEchooff

E1 Echo on*

eneralCommands,Cont.

<C#>-30 V.3229 / V.3229L

synchronous Operating Commands

Online State Character Echo F

In some lower speed modems the ATF command determines if characters are echoed to the DTE from the modem when online. This function is generally controlled by the communications software. The modem does not support online character echo.

Hanging Up H

To end a call, enter ATH. This tells the modem to disconnect and go on hook. The modem must be in online command mode to use this command.

EPROM Check ATI I

PC software packages may issue the ATI command to verify the modem will support all commands needed by the software package. The modem returns ASCII characters representing the model and revision level. To request the CRC to be calculated on the EPROM, enter ATI1. The modem returns four ASCII characters representing the CRC in hexadecimal form. Enter ATI3 to request the product version.

Speaker Volume

Table 18:

Command Operation

I Request product code

I1 Request EPROM CRC value

I3 Request product version

eneralCommands,Cont.

V.3229 / V.3229L <C#>-31

Asynchronous Operating Commands

ATL commands offer three volume levels.

*default

Table 19:

Command Operation

L, L1 Speaker volume low

L2 Speaker volume medium*

L3 Speaker volume high

eneralCommands,Cont.

<C#>-32 V.3229 / V.3229L

synchronous Operating Commands

Speaker Control M

ATM commands enable or disable the speaker for monitoring purposes.

*default

Return Online O

Use the O command when operating in the online command mode and need to return to data mode. It returns the modem to the same mode (originate or answer) that it was in before escaping to the (online) command mode.

Long Space Disconnect Y

One method of disconnecting two modems is called long space disconnect. When any disconnect condition is detected by the local modem, it will send 4 seconds of data space condition to the remote modem before disconnecting. This signals the remote modem to disconnect. The local modem will disconnect if it receives 1.6 or more seconds of data space

Table 20:

Command Operation

M Disables the speaker

M1 Disables the speaker while receiving

a carrier signal*

M2 Speaker always on

M3 Disables the speakerwhile dialing and

after a carrier is detected

eneralCommands,Cont.

V.3229 / V.3229L <C#>-33

Asynchronous Operating Commands

condition from a remote modem. If break sequences of 1.6 or more seconds are to be sent, enter ATY to disable this feature and prevent unintentional disconnects.

Note: This option must be disabled if SDLC NRZI data is used.

*default

Guard Tones &G

Guard tones are not used in the United States. If required where operating the unit, select the appropriate guard tone.

*default

Dial / Leased Line &L

Table 21:

Y Long space disconnect off

Y1 Long space disconnect on*

Table 22:

Command Operation

&G No guard tone*

&G1 550 Hz guard tone

&G2 1800 Hz guard tone

eneralCommands,Cont.

<C#>-34 V.3229 / V.3229L

synchronous Operating Commands

&L selects line operation as required.

*default

Asynchronous / Synchronous Mode Selection &M

The AT&M commands select synchronous or asynchronous operation and synchronous dial method.

AT&M selects asynchronous data and dial mode.

AT&M1 selects synchronous data mode 1. Calls are placed asynchronously. Operation switches to synchronous after connecting with the remote modem.

Table 23:

Command Operation

&L Dial (switched)*

&L1 Leased (private) 2-wire

&L2 Leased (private) 4-wire

V.3229 / V.3229L <C#>-35

Asynchronous Operating Commands

AT&M2 selects synchronous data mode 2. The modem automatically dials a stored number when it detects a DTR off-to-on transition. The appropriate DTR option must be selected.

AT&M3 selects synchronous data mode 3. Calls are placed manually.

AT&M4 selects synchronous data mode 4 with V.25 bis autodialer set for Bisync protocol.

AT&M5 selects synchronous data mode 5 with V.25 bis autodialer set for SDLC protocol.

Use register S30 to select NRZ/NRZI for protocol data format if using SDLC.

*default

Caution: Synchronous terminal equipment must be available to communicate with the modem if the V.25 bis dialer is enabled.

Table 24:

Command Operation

&M Asynchronous mode*

&M1 Sync mode 1

&M2 Sync mode 2

&M3 Sync mode 3

&M4 Sync mode 4 with V.25 bis Bisync

&M5 Sync mode 5 with V.25 bis SDLC

Confi

gurationCommands,Cont.

<C#>-36 V.3229 / V.3229L

synchronous Operating Commands

Make / Break Dial Pulse Ratio &P

Using AT&P, the dial pulse is on for 39% and off for 61% of one cycle. Using AT&P1, the dial pulse is on for 33% and off for 67% of one cycle.

*default

Synchronous Transmit Clock Source &X

The AT&X commands select internal, external, or receive clock as the transmit clock source.

*default

DCE Speed %B

Table 25:

Command Operation

&P 39% : 61% US and Canada*

&P1 33% : 67%

Table 26:

Command Operation

&X Internal clock*

&X1 External clock

&X2 Receive clock

Confi

gurationCommands,Cont.

Motorola V3229 - 14.4 Kbps Modem, V3229 V3229L Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual