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Configuring your Courier modem for leased line operation

You can use the Courier modem in either smart or dumb mode (determined by the position of DIP switch 8).

If you are using your modem on a leased or dedicated line and they are both set to &L1, the modems will automatically connect when powered on. They also reconnect, without any operator intervention, if a disturbance on the line is severe enough to break the connection.

  1. Set your terminal or communications software to the rate at which you want the modems to communicate.
  2. For example, use a terminal/software setting of 9600 bps and, if both modems have the capability, they will connect at 9600 bps.

  3. Send AT&B1&S2&H1&L1&W to the modem.

    &B1Fixes the Courier V.Everything modem's serial port rate at the same rate you selected when setting up your communications software.
    &S2 Causes the Courier V.Everything modem to send a Clear to Send (CTS) signal only after it sends the Carrier Detect (CD) signal, that is, only after it connects with the remote modem.
    &H1Enables hardware (CTS) flow control.
    &L1Forces the modems off hook at power on and enables them to re-establish the connection should it be broken (for leased lines only).
    &WWrites the settings to nonvolatile memory (NVRAM) as power-on defaults.

    We recommend using the &S2 setting to delay CTS until after the connection is made, as a precaution.

    If the modems are in the process of connecting or reconnecting, the Courier V.Everything modem interprets any keyboard data entry, including an accidental key stroke, as a key-press abort, and hangs up. Delaying CTS until after carrier detection prevents this from happening. However, you have to set the Courier V.Everything modem for hardware flow control by sending AT&H1.

    If your software or computer does not support Clear to Send (CTS), don't include &S2 and &H1 in the command string as suggested above. But keep in mind that if the modems fail to connect or reconnect, the reason could be a keypress abort.

  4. Set DIP switch 10 OFF. This tells the Courier V.Everything modem to load NVRAM settings at power-on. It does not matter whether the Courier V.Everything modem is in Dumb or Smart mode (DIP switch 8).
  5. Decide which modem is to be the calling modem and which the answering modem.
  6. Set the answering modem to Auto Answer, DIP switch 5 OFF, and the calling modem to Auto Answer suppressed, DIP switch 5 ON.
  7. Power off and power on the modems. This initiates the new DIP switch settings and loads the power-on defaults, including &L1. The modems go off hook and establish the connection.

If the modems cannot restore the connection and you did not set the Courier V.Everything modem to &S2, the reason could be a keypress abort. If the problem persists, however, you may need to call your telephone company to have them check your line.

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