1

OFF (Up)

DTR (Data Terminal Ready) override

2

OFF (Up)

Verbal result codes (text-formatted feedback characters such as connected or no carrier)

3

ON (Down)

Enable result codes

4

OFF (Up)

Displays keyboard commands (local echo)

5

OFF (Up)

Sets auto answer. Verify that the Auto Answer Ring Count (rings): on the maintenance-related system parameters form is S0=10.

6

OFF (Up)

CD (Carrier Detect) override (modem sends CD signal on connect, drops CD on disconnect)

7

OFF (Up)

Power-on and ATZ reset software defaults (loads Y or Y1 configuration from NVRAM)

8

ON (Down)

AT (Attention) command set recognition (enables recognition, smart mode)

Default is none for Release 8 SCC. Set to external if a modem is used.

This field is 20 characters long and permits alphanumeric characters to provide a unique qualifier for a given modem.

Informs modem that communication with the data source UART is driven with RTS/CTS flow control. The default 6-character field name is &H1. Set the field name to \Q3 for Intel modems. This field is not case-sensitive.

Configures modem as an asynchronous device. This 8-character field name has a default value of &M0 (default) for Release 8 SCC. Set the field to &M0&Q0 for Intel modems. This field is not case-sensitive.

Adjusts the speed of the data source (DTE) UART to the outgoing (modem-to-modem) data rate. At maximum, this speed is 9600 baud. It is not desirable to have the serial data fill the modem buffer faster than the outgoing data rate, since data compression is disabled. The field name has a 6-character blank default value. The Paradyne products use S90=1 to enable this functionality while the Intel product uses \J1 to enable similar functionality. This field is not case-sensitive.

Turns off the default data compression algorithms used by most modems. The field has a blank field of 6 characters as default. The AT commands that control this are supported by similar commands; however, these commands do not operate in the same manner. The Intel modems require H0%C0 to disable V.42bis & MNP Class 5 data compression algorithms. The Paradyne products only use %C0 to disable both algorithms. This field is not case-sensitive.

Turns on the V.42 LAPM and MNP error control protocols. The field has a blank default of 6 characters. The Paradyne products use the command \N5 to enable V.42/MNP/Buffer error control while the Intel product uses \N3 to provide similar functionality.

This field has a 20-character blank default and supports any initialization parameters not already specified. The AT commands specified in this field are always the last initialization parameters to be sent to the external modem. This field is not case-sensitive.

This field controls the number of rings required before the modem answers an incoming call. This field should be set to S0=10.

This field controls the type of interregister signaling used between the modem and the CO. This 3-character field is denoted by "T" for tone dialing (default) and "P" for pulse dialing. This setting depends on type of line (tone or pulse) to the modem.

This field controls the make/break ratios of pulses and DTMF dialing. Most modems have support for different make/ break options for pulse dialing only. Paradyne, Intel, and U.S. Robotics use the default &P0 to select a ratio of 39% make and 61% break for communication for the United States and Canada. The option &P1 sets a ratio of 33% make and 67% break for the United Kingdom and Hong Kong. This is a 5-character blank field (default) and is not case-sensitive.

This field has a default of "D" in a 3-character field. This field denotes the standard dialing command of the modem and is not case-sensitive.

Most modems provide a timer that abandons any outbound data call after a predetermined interval. This is a non-administrable parameter.