Nortel Meridian 1 General Maintenance Information page 16

Page 16 of 72 Communicating with the system
System terminal
Message format
553-3001-500 Standard 15.00
Note: Before Release 19, only one device at a time can communicate
with the system. Accessing a device while another is logged in will log
out the device that was already connected. The Multi User Login feature,
available with Release 19 and later, allows more than one device to
interact with the Meridian 1. Refer to System Management Applications
(553-3001-301) for details on using this feature.
You can send maintenance commands and receive system messages (status
and error messages) by accessing the Central Processing Unit (CPU) through
an RS-232 device, such as a video display terminal (VDT) or teletypewriter
(TTY).
For most system options, only the code is displayed or printed when the CPU
sends system messages. For the interpretation of the code and any required
action, refer to System Messages (553-3001-411). Options 51C, 61C, 81, and
81C provide the code, a plain text explanation, and required actions.
Release 18 and later provide enhanced I/O buffering (independent
throughout). With this capability, devices with higher baud rates run faster
than devices that are limited to slower speeds.
Through the system terminal, you can enter commands that tell the system to
perform specific tasks; the system performs the tasks and sends messages
back to the system terminal, indicating status or errors. System messages,
along with indicators such as maintenance display codes and light emitting
diode (LED) indicators, identify faults in the system.
January 2002