3Com 3C13636 Configuration Manual page 1481

3Com Router 3000 Ethernet Family
Configuration Guide
modem, the routers can negotiate the protocol to be encapsulated with the
physical link and its operating parameters.
II. 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-string and send-string appear in pairs, and the script must begin
with a receive-string. For example, "receive-string1 send-string1" represents the
execution flow: Expect to receive receive-string1, and send send-string1 to the
modem if the received string matches receive-string1 before 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 "-".
By default, the timer times out five seconds later while waiting for a receive-string.
TIMEOUT seconds can be inserted into the script at 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, "") has 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-string can 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-string set 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
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Chapter 3 Modem Configuration