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40-400-00022 Rev. B
Chapter 3 - Overview
User Ports
The four or eight DCE User ports will support between 300 - 38,400 bps
asynchronous data transmission rates.
Local Maintenance Port
The Local Maintenance port accepts a terminal or terminal emulator. No
password is required for programming access through this port. Program-
ming access will be a lower priority process than any ongoing data transfer.
Incoming Traffic
Incoming traffic to the DS-100 is answered by the modem which must be
configured for auto-answer. The DS-100 looks for DCD (carrier detect) from
the modem to know that a call has been received. It then starts monitoring
the data from the modem for a system password (if one is programmed)
followed by a transfer code. By default, there is no access password.
Remote Programming
Remote programming access can be performed through the Modem input
port. A transfer code sent to this port will access programming mode by
sending “ab0” where “ab” is the default code. Any initial remote access to the
menu via the Modem port will require (in default configuration) a program-
ming password, with “teltone” being the default password. Once access is
gained, an inactivity timer will terminate programming connection after a
programmable (default=3) number of minutes of no activity.
Routing Commands
The DS-100 monitors the data flow into the Modem port for data switch
commands. To enter a command, there must be a pause in the data stream
into the Modem port, followed by a 3-character command string, followed by
another pause in data. All commands are 3 characters in length, and all 3
characters must be entered within a 2 second period. The minimum length
for the pauses before and after the command string are user programmable
from 0.1 to 2.0 seconds, in 0.1 second increments.
If the string is not a valid command, pauses too short, or the 3 characters are
not entered within a 2 second period, the string will be forwarded to the
currently selected User port. If the string is a valid command, it is not
forwarded to the User port.
The DS-100 recognizes the following commands:
ab0
Connects to maintenance menus for remote configuration
ab1 thru ab8
Connects the Modem port to the selected User port
ab?
Reports which User port is currently connected to the
Modem port
The “ab” prefix for the commands is user programmable.
