
AT&T PARADYNE

COMSPHERE 3910

Modem Type                   Data (synchronous/asynchronous)
Maximum Data Rate            19.2Kbps
Data Bus                     External
Data Modulation Protocol     AT&T V.32terbo, Point to Point diagnostic,
                             Trellis Multipoint

                             Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.23, V27bis,
                             V.29, V.32, V.32bis
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose             Location         Purpose          Location

  Switched line                CN1        Power switch           SW1

  Leased line                  CN2        Scroll left            CN6

  RS-232/422                   CN3        Scroll right           CN7

  DC power                     CN4        Go up one level        CN8

  Network Management           CN5        Go to top level        CN9
  (proprietary)

                             DIAGNOSTIC LED(S)

     LED        Color        Status                  Condition

     PWR        Green          On                   Power is on

     PWR        Green         Off                  Power is off

     ALRM        Red        Blinking         Major alarm detected in a
                                             remote 391x series modem

     ALRM        Red          Off                Normal operation

     DIAG       Green          On          Modem is receiving diagnostic
                                                     messages

     DIAG       Green         Off              Modem is not receiving
                                                diagnostic messages

   DTR/108      Green          On               DTR signal is high

   DTR/108      Green         Off                DTR signal is low

   RTS/105      Green          On               RTS signal is high

   RTS/105      Green         Off                RTS signal is low

   CTS/106      Green          On               CTS signal is high

   CTS/106      Green         Off                CTS signal is low

   TXD/103      Green          On           Modem is receiving data from
                                                        DTE

   TXD/103      Green         Off           Modem is not receiving data
                                                     from DTE

   LSD/109      Green          On             Carrier signal detected

   LSD/109      Green         Off           Carrier signal not detected

   RXD/104      Green          On          Modem is transmitting data to
                                                        DTE

   RXD/104      Green         Off          Modem is not transmitting data
                                                      to DTE

      SQ        Yellow      Blinking      Line signal is degraded or data
                                               path is being blocked

      SQ        Yellow        Off                Normal operation

   TEST/142     Yellow         On           Test connection established

   TEST/142     Yellow      Blinking        Modem is upgrading firmware

   TEST/142     Yellow        Off         No test connection established

     RATE       Yellow         On         Modem is connected at less than
                                                 configured speed

     RATE       Yellow        Off              Modem is connected at
                                                 configured speed

     DIAL       Yellow         On             Modem is establishing a
                                             switched line connection

     DIAL       Yellow      Blinking          Switched line connection
                                                    established

     DIAL       Yellow        Off           No switched line connection

                         Proprietary AT Command Set

                               ANTISTREAMING

  Type:          Register

  Format:        AT [cmds] S72=n [cmds]

  Example:       AT S72=0 &W<CR>

  Description:   Selects antistreaming option

  Command                                Function

   S72=0        Disabled

  S72=1          10 seconds

  S72=2          30 seconds

  S72=3          1 minute

  S72=4          2 minutes

  S72=5          3 minutes

  S72=6          5 minutes

                            AT COMMAND RESPONSE

  Type:          Register

  Format:        AT [cmds] S84=n [cmds]

  Example:       AT S84=0 &W<CR>

  Description:   Sets the response to AT commands.

  Command                                Function

   S84=0        Normal operation

  S84=1          Execute valid commands, suppress error codes.

  S84=2          Ignore configuration commands, always return OK error
                 code.

                                 AUTO BAUD

  Type:          Register

  Format:        AT [cmds] S78=n [cmds]

  Example:       AT S78=0 &W<CR>

  Description:   Allows modem to connect at remote modems modulation.

  Command                                Function

   S78=0        Auto baud enabled.

  S78=1          Auto baud disabled.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Configuration

  Format:            AT [cmds] %An [cmds]

  Example:           AT%A20<CR>

  Default:           19

  Range:             0-127

  Unit:              ASCII

  Description:       Sets the character used as the auto-reliable
                     fallback character. %A0 will disable this function.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:           Configuration

  Format:         AT [cmds] \Cn [cmds]

  Example:        AT \C1 &W<CR>

  Description:    Controls the handling of incoming data during
                  auto-reliable time period.

  Command                                Function

   \CO           Data is discarded.

  \C1             Data is buffered.

  \C2             Data is discarded, resets to \C1 on receipt of
                  autoreliable fallback character.

                                BREAK TYPE

  Type:          Configuration

  Format:        AT [cmds] \Kn [cmds]

  Example:       AT \K5 &W<CR>

  Description:   Selects response to DTE break command.

  Command                                Function

  \K0            Send break, clear buffer, enter command mode.

  \K1            Send break, clear buffer

  \K2            Send break, send data, enter command mode.

  \K3            Send break. send data,

  \K4            Send data, send break, enter command mode.

   \K5          Send data, send break.

                        BUFFER REDUCED ASYNCRONOUS

  Type:          Register

  Format:        AT [cmds] S97=n [cmds]

  Example:       AT S97=0 &W<CR>

  Description:   Limits asynchronous buffer size to a 20 character
                 maximum

  Command                                Function

   S97=0        Buffer size limit disabled.

  S97=1          Buffer size limit enabled

                            BUSY OUT ON LOW DTR

  Type:          Register

  Format:        AT [cmds] S69=n [cmds]

  Example:       AT S69=0 &W<CR>

  Description:   Modem goes off hook on low DTR (use only in PBX mode).

  Command                                Function

   S69=0        Busy out disabled.

  S69=1          Busy out enabled.

                             CALLBACK SECURITY

  Type:          Register

  Format:        AT [cmds] S67=n [cmds]

  Example:       AT S67=0 &W<CR>

  Description:   Enables callback security option

  Command                                Function

   S67=0        Disabled

  S67=1          Enabled

                                 CD SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  Example:       AT &C3 *RS1 *SR1<CR>

  Description:   Configures the behavior of the carrier detect signal.

  Command                                Function

  &C0            CD forced high.

   &C1          CD normal.

  &C2            CD forced high except during handshaking and
                 disconnecting.

  &C3            CD momentary follows DTR.

  &C4            CD follows remote RTS signal.

  &C5            CD Follows DTR signal. Forced low on disconnect.

                           CELLULAR ENHANCEMENTS

  Type:          Register

  Format:        AT [cmds] S91=n [cmds]

  Example:       AT S91=0 &W<CR>

  Description:   Configures modem to enhanced cellular mode

  Command                                Function

   S91=0        Disabled

  S91=1          Enabled

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT I2 %C1 &B0 <CR>

  Description:   Selects data compression.

    Command                              Function

  %C0            Data compression disabled.

   %C1          Data compression enabled.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] \Dn [cmds]

  Example:       AT \D0<CR>

  Description:   Selects the function of the CTS signal.

  Command                                Function

   \D0          CTS forced high.

  \D1            CTS normal.

  \D2            CTS interrupted for 2 seconds on disconnect.

  \D3            CTS follows DTR.

  \D4            CTS follows RTS

                          DISCONNECT BUFFER DELAY

  Type:                 Register

  Format:               AT [cmds] S49=n [cmds]

  Example:              AT S49=0<CR>

  Default:              10

  Range:                0-255

  Unit:                 1 second

  Description:          Selects how long the modem will continue to
                        transmit data in transmit buffer after receipt of
                        disconnect signal

                          DISCONNECT IMMEDIATELY

  Type:             Register

  Format:           AT [cmds] S85=n [cmds]

  Example:          AT S85=0 &W<CR>

  Description:      Disconnect immediately on receipt of disconnect
                    signal from DTE or diagnostic control panel.

  Command                                 Function

   S85=0           Disabled.

  S85=1             Enabled.

                       DISCONNECT ON LOSS OF CURRENT

  Type:          Register

  Format:        AT [cmds] S65=n [cmds]

  Example:       AT S65=0<CR>

  Description:   Causes the modem to disconnect if the telephone lines
                 current drops.

  Command                                Function

   S65=0        Disconnect after 8ms if current is lost.

  S65=1          Disconnect after 90ms if current is lost.

  S65=2          Disabled

                             DTE RATE CONTROL

  Type:          Register

  Format:        AT [cmds] S61=n [cmds]

  Example:       AT S61=0 &W<CR>

  Description:   Sets result of DTE CT111 rate control signal.

  Command                                Function

   S61=0        Disabled.

  S61=1          Fallback 1.

  S61=2          Fallback 2.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT \G1 &K3<CR>

  Description:   Selects modem port flow control.

  Command                                Function

   \G0          Flow control disabled.

  \G1            Flow control enabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q5<CR>

  Description:   Sets type of flow control used by modem.

  Command                                Function

  \Q0            Flow control disabled.

  \Q1            Bidirectional XON/XOFF flow control enabled.

   \Q2          CTS flow control by DCE enabled.

  \Q3            Bidirectional CTS/RTS flow control enabled.

  \Q4            XON/XOFF flow control by DTE enabled.

  \Q5            XON/XOFF flow control by DCE enabled.

  \Q6            RTS flow control by DTE enabled.

                             INACTIVITY TIMER

  Type:             Configuration

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<CR>

  Default:          0

  Range:            0-255

  Unit:             1 minute

  Description:      Sets the length of time that the modem does not
                    receive information before it disconnects.

                             LAP-M FRAME SIZE

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Example:       AT \A3 %C1<CR>

  Description:   Sets the maximum frame size for V.42 and MNP
                 connections.

  Command                                Function

  \A0            Maximum frame size is 64

  \A1            Maximum frame size is 128

  \A2            Maximum frame size is 192

   \A3          Maximum frame size is 256

  \A4            Maximum frame size is 32

  \A5            Maximum frame size is 16

                            LAP-M FRAME WINDOW

  Type:          Register

  Format:        AT [cmds] S89=n [cmds]

  Example:       ATS89=6<CR>

  Default:       0

  Range:         1-9

  Unit:          1 frame (beginning with 0=6 frames)

  Description:   Sets the number of frames used in V.42 and V.42bis
                 transmissions

                         LEASED LINE AUTO-RETRAIN

  Type:           Register

  Format:         AT [cmds] S82=n [cmds]

  Example:        AT S82=0 &W<CR>

  Description:    Allows modem to retrain to compensate for bad line
                  quality in V.32bis or V.32terbo

  Command                                Function

   S82=0         Retrain enabled.

  S82=1           Retrain disabled.

                    LEASED LINE BACKUP SPECIAL STANDBY

  Type:          Register

  Format:        AT [cmds] S98=n [cmds]

  Example:       AT S98=0 &W<CR>

  Description:   Allows leased line dial backup using a third modem.

  Command                                Function

   S98=0        Disabled

  S98=1          Enabled

                          LEASED LINE DIAL BACKUP

  Type:          Register

  Format:        AT [cmds] S46=n [cmds]

  Example:       AT S46=0 &F1<CR>

  Description:   Automatically establishes switched line connection if
                 leased line fails

    Command                              Function

   S46=0        Disabled.

  S46=1          Enabled.

                     LEASED LINE BACKUP RECOVERY DELAY

  Type:          Configuration

  Format:        AT [cmds] S47=n &F1 [cmds]

  Example:       AT S47=0 &F1 <CR>

  Description:   After leased line failure, modem attempts to reconnect
                 after specified delay.

    Command                              Function

   S46=0        Disabled.

  S46=1          15 minute delay.

  S46=2          60 minute delay.

  S46=3          4 hour delay

  S46=4          2 minute delay (test)

  S46=5          Adv 15 minutes

  S46=6          Adv 30 minutes

  S46=7          Adv 60 minutes

  S46=8          Adv 2 minutes (test)

                       LEASED LINE DISCONNECT LEVEL

  Type:          Register

  Format:        AT [cmds] S48=n [cmds]

  Example:       AT S48=0 &W<CR>

  Description:   Sets level carrier signal drops to before disconnect.

  Command                                Function

   S48=0        Disconnect at -43dBm

  S48=1          Disconnect at -26dBm

  S48=2          Disconnect at -33dBm

                             LEASED LINE SPEED

  Type:          Register

  Format:        AT [cmds] S44=n [cmds]

  Example:       ATS44=18<CR>

  Default:       18

  Description:   Sets maximum leased line speed

    Command                              Function

  S44=1          14.4Kbps V.32bis

  S44=2          12.0Kbps V.32bis

  S44=3          9600bps V.32bis

  S44=4          7200bps V.32bis

  S44=5          4800bps V.32bis

  S44=6          2400bps V.22bis

  S44=11         14.4Kbps V.33

  S44=12         12.0Kbps V.33

  S44=13         9600bps V.29

  S44=14         7200bps V.29

  S44=15         4800bps V.29

  S44=16         4800bps V.27

  S44=17         2400bps V.27bis

   S44=18       19.2Kbps V.32terbo

  S44=19         16.8Kbps V.32terbo

  S44=20         19.2Kbps TMp

  S44=21         14.4Kbps TMp

  S44=22         9600bps TMp

  S44=23         7200bps TMp

  S44=24         4800bps TMp

  S44=25         2400bps TMp

                      LEASED LINE TRANSMISSION LEVEL

  Type:          Register

  Format:        AT [cmds] S45=n [cmds]

  Example:       AT S45=15<CR>

  Default:       0

  Range:         0 - 15

  Unit:          1 dBm

  Description:   Sets the signal level for transmission when in leased
                 line mode.

                                 LINE TYPE

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Example:       AT &L0 H1 DT555-1212<CR>

  Description:   Selects line type.

  Command                                Function

   &L0          Switched line.

  &L1            2-wire originate mode leased line.

  &L2            4-wire originate mode leased line.

  &L3            2-wire answer mode leased line.

  &L4            4-wire answer mode leased line.

                           LOCAL ANALOG LOOPBACK

  Type:          Register

  Format:        AT [cmds] S52=n [cmds]

  Example:       AT S52=0 &W<CR>

  Description:   Modem executes local analog loopback on receipt of CT141
                 signal from DTE

  Command                                Function

   S52=0        Loopback disabled.

  S52=1          Loopback enabled.

                             LOCK SERIAL PORT

  Type:          Register

  Format:        AT [cmds] S90=n [cmds]

  Example:       AT S90=0<CR>

  Description:   Sets operation of serial port speed.

  Command                                Function

   S90=0        Disabled.

  S90=1          Serial speed follows connect speed.

                      NETWORK POSITION IDENTIFICATION

  Type:          Register

  Format:        AT [cmds] S74=n [cmds]

  Example:       AT S74=0 &W<CR>

  Description:   Identifies modem as either tributary or control

  Command                                Function

   S74=0        Identify as tributary

  S74=1          Identify as control

                          PASSWORD REMOTE ACCESS

  Type:          Register

  Format:        AT [cmds] S56=n [cmds]

  Example:       ATS56=06<CR>

  Default:       None

  Range:         00-99

  Unit:          Password digits

  Description:   Allows entry of the first two digits of remote access
                 password.

                          PASSWORD REMOTE ACCESS

  Type:          Register

  Format:        AT [cmds] S57=n [cmds]

  Example:       ATS57=06<CR>

  Default:       None

  Range:         00-99

  Unit:          Password digits

  Description:   Allows entry of the second two digits of remote access
                 password.

                          PASSWORD REMOTE ACCESS

  Type:          Register

  Format:        AT [cmds] S58=n [cmds]

  Example:       ATS58=06<CR>

  Default:       None

  Range:         00-99

  Unit:          Password digits

  Description:   Allows entry of the third two digits of remote access
                 password.

                          PASSWORD REMOTE ACCESS

  Type:          Register

  Format:        AT [cmds] S59=n [cmds]

  Example:       ATS59=06<CR>

  Default:       None

  Range:         00-99

  Unit:          Password digits

  Description:   Allows entry of the fourth two digits of remote access
                 password.

                           REMOTE CONFIGURATION

  Type:          Register

  Format:        AT [cmds] S55=n [cmds]

  Example:       AT S55=0 &W<CR>

  Description:   Allows remote configuration by 3800 series modem.

  Command                                Function

   S55=0        Remote configuration enabled.

  S55=1          Remote configuration disabled.

                          REMOTE DIGITAL LOOPBACK

  Type:          Register

  Format:        AT [cmds] S51=n [cmds]

  Example:       AT S51=0 &W<CR>

  Description:   Modem executes remote digital loopback on receipt of
                 CT140 signal from DTE

  Command                                Function

   S51=0        Loopback disabled.

  S51=1          Loopback enabled.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Example:       AT I1 O<CR>

  Description:   Displays modem properties.

    Command                              Function

       I0        Reports product code.

       I1        Reports firmware 3 digit version number.

       I2        Performs EPROM check

                              STORED PROFILE

  Type:          Register

  Format:        AT [cmds] S88=n [cmds]

  Example:       AT S88=0 &W<CR>

  Description:   Loads stored profile on disconnect.

  Command                                Function

   S88=0        Disabled.

  S88=231        Disabled.

  S88=1          Enabled.

  S88=232        Enabled.

                            SWITCHED LINE SPEED

  Type:          Register

  Format:        AT [cmds] S41=n [cmds]

  Example:       ATS41=20<CR>

  Default:       20

  Description:   Sets maximum line speed

  Command                                Function

  S41=1          14.4Kbps V.32bis

  S41=2          12.0Kbps V.32bis

  S41=3          9600bps V.32bis, V.32

  S41=4          7200bps V.32bis

  S41=5          4800bps V.32bis, V.32

  S41=6          2400bps V.22bis

  S41=11         14.4Kbps V.33

  S41=12         12000bps V.33

  S41=13         9600bps V.29

  S41=14         7200bps V.29

  S41=15         4800bps V.29

  S41=16         4800bps V.27

  S41=17         2400bpsV.27bis

  S41=18         19.2Kbps V.32terbo

  S41=19         16.8Kbps V.32terbo

   S41=20       19.2Kbps TMp

  S41=21         14.4Kbps TMp

  S41=22         9600bps TMp

  S41=23         7200bps TMp

  S41=24         4800bps TMp

  S41=25         2400bps TMp

                            TRANSMISSION LEVEL

  Type:          Configuration

  Format:        AT [cmds] &In [cmds]

  Example:       AT &I26 &W<CR>

  Default:       Unidentified

  Range:         0-32, 99, 100

  Unit:          -1 dBm

  Description:   Sets the signal level for transmission

  Note: 0-9 invalid in North America.

                  TRELLIS MULTIPOINT TRANSMIT PREEMPHASIS

  Type:          Register

  Format:        AT [cmds] S96=n [cmds]

  Example:       AT S96=0 &W<CR>

  Description:   Compensates for high frequency attenuation with
                 amplification

  Command                                Function

   S96=0        Enabled

  S96=1          Disabled

                       TRELLIS MULTIPOINT TRAIN TIME

  Type:          Register

  Format:        AT [cmds] S95=n [cmds]

  Example:       AT S95=0 &W<CR>

  Description:   Selects train time from tributary to control modem.

  Command                                Function

   S95=0        10 milliseconds

  S95=1          20 milliseconds

  S95=2          50 milliseconds

  S95=3          100 milliseconds

  S95=4          200 milliseconds

  S95=5          300 milliseconds

                             V.25bis CODE SET

  Type:          Register

  Format:        AT [cmds] S62=n [cmds]

  Example:       AT S62=0 &W<CR>

  Description:   Sets coding type used in V.25bis mode.

  Command                                Function

   S62=0        ASCII

  S62=1          EBCDIC

                          V.25bis IDLE CHARACTER

  Type:          Register

  Format:        AT [cmds] S63=n [cmds]

  Example:       AT S63=0 &W<CR>

  Description:   Sets V.25 idle fill type

  Command                                Function

   S63=0        Fill character is mark.

  S63=1          Fill character is flag.

                        V.25bis NEW LINE CHARACTER

  Type:          Register

  Format:        AT [cmds] S64=n [cmds]

  Example:       AT S64=0 &W<CR>

  Description:   Sets V.25 new line character.

  Command                                Function

   S64=0        Carriage return and line feed.

  S64=1          Carriage return.

  S64=2          Line feed.

                                V.27 TRAIN

  Type:          Register

  Format:        AT [cmds] S72=n [cmds]

  Example:       AT S72=0 &W<CR>

  Description:   Sets train length.

  Command                                Function

   S43=0        Short

     S43=1       Long

                              V.29 LINK TYPE

  Type:          Register

  Format:        AT [cmds] S94=n [cmds]

  Example:       AT S94=0 &W<CR>

  Description:   Selects point to point or multipoint operation

  Command                                Function

   S94=0        Point to point operation

  S94=1          Multipoint operation

                               V.29 RETRAIN

  Type:          Register

  Format:        AT [cmds] S93=n [cmds]

  Example:       AT S93=0 &W<CR>

  Description:   Modem transmits training sequence on receipt of training
                 sequence

  Command                                Function

   S93=0        Disabled

  S93=1          Enabled

                                V.29 TRAIN

  Type:            Register

  Format:          AT [cmds] S92=n [cmds]

  Example:         AT S92=0 &W<CR>

  Description:     Allows retrain based on incoming data or training
                   sequence. Required for tributary modem.

  Command                                 Function

   S92=0          Disabled

  S92=1            Enabled

                           V.32bis AUTO-RETRAIN

  Type:           Register

  Format:         AT [cmds] S76=n [cmds]

  Example:        AT S76=0 &W<CR>

  Description:    Selects action the modem will take during bad line
                  quality on 32bis connection.

  Command                                Function

   S76=0         Auto retrain enabled.

  S76=1           Auto retrain disabled.

                               V.32bis TRAIN

  Type:          Register

  Format:        AT [cmds] S43=n [cmds]

  Example:       AT S43=0 &W<CR>

  Description:   Sets train length for V.32bis and V32.

  Command                                Function

   S43=0        Long

  S43=1          Short

                        V.42bis COMPRESSION CONTROL

  Type:          Configuration

  Format:        AT [cmds] "Hn [cmds]

  Example:       AT "H3 &W<CR>

  Description:   Controls V.42bis data compression

  Command                                Function

  "H0            V.42bis disabled.

  "H1            V.42bis when transmitting enabled.

  "H2            V.42bis when receiving enabled.

   "H3          V.42bis when transmitting/receiving enabled.

                            V.54 DEVICE ADDRESS

  Type:          Register

  Format:        AT [cmds] S53=n [cmds]

  Example:       ATS53=6<CR>

  Default:       0

  Range:         0-34

  Unit:          Device address 0= disabled

  Description:   Identifies the address of the modem in loopback test.

                             V.54 DEVICE TYPE

  Type:          Register

  Format:        AT [cmds] S54n [cmds]

  Example:       AT S54=0 &W<CR>

  Description:   Identifies modems network position.

  Command                                Function

   S54=0        Peripheral

  S54=1          Intermediate

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X7 O<CR>

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem.

  Command                                Function

   \X0          XON/XOFF signals trapped by local modem.

  \X1            XON/XOFF passed through local modem.

                      Proprietary V.25bis Command Set

                          DISPLAY STORED NUMBERS

  Type:              Immediate

  Format:            RLNn

  Example:           RLN2<CR>

  Description:       Display number in memory location n. If no number is
                     given, all stored numbers will be displayed.

