Dial Parameters

Parameter

Description

connect_string

This field only applies to Hayes-AT compatible modems. If this field is included, the link will be considered established only after the string specified has been received from the modem. It is not necessary to specify the entire connect string, the first 4 or 5 characters may suffice. Up to 20 non-white characters may be specified, and octal format may be used to specify white characters or "#". For example, CONNECT\0409600 tests for a 9600 bps connection. The \040 is an octal representation of the space character " " occasionally found in this string.

dial_string

This field specifies the phone number to be dialed when calls are made. For CCITT V.25bis dialing, the telephone number must be all digits, and may be up to 80 characters long. Some V.25bis modems allow selection of tone or pulse dialing by preceding the telephone number with a T or P indicating how to dial. For Hayes-AT compatible modems, up to 80 non-white characters may be specified, and octal format may be used to specify white characters or "#". The entire AT command string should appear here.

gosync_command

This field only applies to Hayes-AT compatible modems. The gosync_command is used by modems that do not support an automatic facility to switch from asynchronous to synchronous mode. This field should be filled with modem commands that will force the modem into a synchronous configuration. This string is sent as soon as the connect_string is received. Up to 20 non-white characters may be specified, and octal format may be used to specify white characters or "#".

init_string

This field only applies to Hayes-AT compatible modems. This string is used to initially configure the asynchronous modem, once the board has been loaded. The init string will only be sent once, regardless of how many times the modem is dialed. Up to 80 non-white characters may be specified, and octal format may be used to even specify white characters or "#".

number_of_retries

Default: 0.
The number of times a number will be re-dialed after a failed attempt. Failures include busy numbers, premature hang up, and call time-out (see time-out_between_retry). Errors such as CTS (EIA-RS232C signal) being held low or modem reports no dial tone will terminate a dial attempt immediately without any retries or other numbers being dialed.

time-out_between_retry

Default: 0
The number of seconds after a number has been dialed that will be allowed to pass before the attempt is aborted. If a time-out occurs either the number will be re-dialed or the remaining dial_defns will be attempted.

xid_string

This field specifies the CCITT X.32 XID string. Up to 24 non-white characters may be specified, and octal format may be used to specify white characters or "#". The xid_string will be transmitted by the calling host before the frame level is established. The called host will wait for the correct xid string and respond accordingly before establishing the frame level.

Revision 1.1 (January 2002)

Parameter	Description
`connect_string`	This field only applies to Hayes-AT compatible modems. If this field is included, the link will be considered established only after the string specified has been received from the modem. It is not necessary to specify the entire connect string, the first 4 or 5 characters may suffice. Up to 20 non-white characters may be specified, and octal format may be used to specify white characters or "#". For example, `CONNECT\0409600` tests for a 9600 bps connection. The `\040` is an octal representation of the space character " " occasionally found in this string.
`dial_string`	This field specifies the phone number to be dialed when calls are made. For CCITT V.25bis dialing, the telephone number must be all digits, and may be up to 80 characters long. Some V.25bis modems allow selection of tone or pulse dialing by preceding the telephone number with a T or P indicating how to dial. For Hayes-AT compatible modems, up to 80 non-white characters may be specified, and octal format may be used to specify white characters or "#". The entire AT command string should appear here.
`gosync_command`	This field only applies to Hayes-AT compatible modems. The `gosync_command` is used by modems that do not support an automatic facility to switch from asynchronous to synchronous mode. This field should be filled with modem commands that will force the modem into a synchronous configuration. This string is sent as soon as the `connect_string` is received. Up to 20 non-white characters may be specified, and octal format may be used to specify white characters or "#".
`init_string`	This field only applies to Hayes-AT compatible modems. This string is used to initially configure the asynchronous modem, once the board has been loaded. The `init` string will only be sent once, regardless of how many times the modem is dialed. Up to 80 non-white characters may be specified, and octal format may be used to even specify white characters or "#".
`number_of_retries`	Default: 0. The number of times a number will be re-dialed after a failed attempt. Failures include busy numbers, premature hang up, and call time-out (see time-out`_between_retry`). Errors such as CTS (EIA-RS232C signal) being held low or modem reports no dial tone will terminate a dial attempt immediately without any retries or other numbers being dialed.
`time-out_between_retry`	Default: 0 The number of seconds after a number has been dialed that will be allowed to pass before the attempt is aborted. If a time-out occurs either the number will be re-dialed or the remaining dial_defns will be attempted.
`xid_string`	This field specifies the CCITT X.32 XID string. Up to 24 non-white characters may be specified, and octal format may be used to specify white characters or "#". The `xid_string` will be transmitted by the calling host before the frame level is established. The called host will wait for the correct xid string and respond accordingly before establishing the frame level.