ZYXEL COMMUNICATIONS CORPORATION

U-1496E/U-1496E+

Modem Type                  Data (synchronous/asynchronous)/Fax/Voice
Maximum Data Rate           19.2Kbps
Maximum Fax Rate            14.4Kbps
Data Bus                    External
Fax Class                   Class I & II
Data Modulation Protocol    Bell 103A/212A

                            CCITT V.21, V.22, V.22bis, V.23, V.26bis,
                            V.27bis, V.29, V.32, V.32bis, V.33

                            ZyXEL 16.8Kbps, 19.2Kbps, ZyCELL
                            4800bps-19.2Kbps cellular
Fax Modulation Protocol     ITU-T V.17, V.21CH2, V.27ter, V.29
Error                       MNP2-5, V.42, V.42bis
Correction/Compression

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                                CONNECTIONS

        Purpose           Location            Purpose            Location

  Line out                  CN1       DC power                     CN3

  Line in                   CN2       RS-232/422                   CN4

                             DIAGNOSTIC LED(S)

    LED        Color        Status                  Condition

    HS          Red           On           Modem is in 9600bps or faster
                                                      mode.

    HS          Red           Off         Modem is in slower than 9600bps
                                                      mode.

    HS          Red        Blinking         Modem is retraining speed.

    AA          Red           On               Auto-answer enabled

    AA          Red           Off              Auto-answer disabled

    AA          Red        Blinking              Line is ringing

    CD          Red           On              Carrier signal has been
                                                    detected.

    CD          Red           Off           Carrier signal has not been
                                                    detected.

    OH          Red           On                Modem is off-hook

    OH          Red           Off                Modem is on-hook

    DTR         Red           On                DTR signal is high

    DTR         Red           Off               DTR signal is low

    DSR         Red           On                DSR signal is high

    DSR         Red           Off               DSR signal is low

    CTS         Red           On                CTS signal is high

    CTS         Red           Off               CTS signal is low

    TXD         Red           On            Modem is transmitting data

    TXD         Red           Off         Modem is not transmitting data

    RXD         Red           On             Modem is receiving data

    RXD         Red           Off          Modem is not receiving data

    EC          Red           On           Modem is in error-correcting
                                                      mode.

    EC          Red           Off        Modem is not in error-correcting
                                                      mode.

    SQ          Red           On             Signal quality is good.

    SQ          Red           Off           Signal quality is poor; at
                                          power-up, indicates an error.

    TST         Red           On              Modem is in test mode.

    TST         Red           Off           Modem is not in test mode.

                          Proprietary Command Set

               See document V1036 for a full command summary.