Multi-Tech Systems ISIHP-4U, ISIHP-4SD manual Hanging Up, Answering Using Call Steering

Terminal Adapter AT Commands & S-Registers

of rings.

2. Make sure that the TA is offline.

The TA answers the call after the number of rings specified by S0. To disable autoanswer, use a configuration utility or the command S0=0.

Note: If the user wants to accept calls while DTR is low, the TA must be configured to ignore DTR. To ignore, enter AT&D0<cr>. With this configu- ration, the TA can accept calls while DTR is low. If this configuration setting is not made, the TA rejects incoming calls until DTR is high while the calls comes in.

Answering Using Call Steering

Call Steering lets you set up the Data DN/MSN numbers and/or Modem DN/MSN numbers so that calls to specific numbers will be “steered” to the respective Data or Modem port. If a DN/MSN is left blank, then the TA assumes the port can accept a call to any number. A port that is given a specific DN/MSN has priority over a port that has a blank DN/MSN. If a port with a specific DN/MSN is busy, then the call will be “steered” to another available port if that port’s DN/MSN matches or is blank. Otherwise if a port is busy and there is no other available port or no other port that matches the called number, then the TA will report a busy. Data DN/MSN 1 will “steer” calls to the first Data (TA) port. Data DN/MSN 2 will “steer” calls to the second Data (TA) port. Modem DN/MSN 1 will “steer” calls to the first Modem port. Modem DN/MSN 2 will “steer” calls to the second Modem port. Call Steering is useful for applications where specific ports are tied to specific types of applications or equipment. For example, fax software attached to the second modem port should only receive fax calls (and not dial-up calls). To do this one would set Modem DN/MSN 2 to the desired number that will only receive fax calls. If Modem DN/MSN 1 is left blank and the second port is busy, then fax calls will be “steered” to port 1. If this is not desired, then set Modem DN/MSN 1 to a number other than that of the number used for faxes.

Hanging Up

To hang up a call, first escape to online command mode (+++AT<cr>), then enter the H command (ATH<cr>). The escape sequence and hang up command can be combined into one command string: +++ATH<cr>.

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