3Com 10014299 Syntax description of modem script, Modem script format in common use is as follow

750CHAPTER 52: CONFIGURING MODEM

Syntax description of modem script

The modem script format in common use is as follow:

receive-string1 send-string1 receive-string2 send-string2......

Where:

■Normally, receive-stringand send-stringappear in pairs, and the script must begin with a receive-string. For example, “receive-string1send-string1” represents the execution flow: Expect to receive receive-string1, and send send-string1to the modem if the received string matches receive-string1before timing out. Otherwise, the execution of the subsequent script will be terminated.

■If the last string is a send-string, it indicates that the execution of the script will be terminated after the string is sent without waiting for any receive-string.

■If it is unnecessary to receive a string at the beginning of a script, and the system can directly wait for the send-string, then the user can set the first receive string to "", which will be explained later.

■Except for ending with “\c”, the send-string will be automatically added with an additional return character to its end when it is sent.

■A receive-string is matched via the location-independent matching method. That is, the match is considered successful as long as the received contents contain the expected string.

■The match operation on a receive-string will be considered successful if the receive-string is matched with any expected receive-strings which are separated with “-“.

■The default timeout time waiting for a receive-string is 5 seconds. TIMEOUT seconds can be inserted into the script anytime to adjust the timeout time waiting for the receive-string, which is valid till a new TIMEOUT is set in the same script.

■All the strings and keywords in a script are case sensitive.

■Both the strings and keywords are separated by spaces. If a space is contained in a string, it should be put in the double quotation marks (" "). A pair of empty quotation marks (that is, "") have two meanings. Being a leading "" in a script, it means that no string is expected from the modem and the system will directly send the strings to the modem. If "" locates in any other locations, the string content will be regarded to be "".

■ABORT receive-stringcan be inserted at any point in a script to change the script execution flow. Its presence in the script indicates that the script execution will be terminated if a received string is fully matched the receive-stringset by ABORT receive-string. Multiple ABORT entries can be defined in a script, and they will take effect concurrently. Once a received string matches any of them, the script execution will be terminated. Regardless of where the ABORT receive-stringis placed, it will take effect in the whole script execution process.

■Escape characters can be inserted in a script for the purpose of better controlling the script and increasing its flexibility. In addition, all the escape characters are the delimiters in the string at the same time.