Nortel Networks M3110 - Manual (Page 424)

Page 424 of 504 Appendix C: Meridian Modular Telephones add-on modules installation
553-3001-367 Standard 3.00 August 2005
ADO operating parameters
Table 68 shows the operating parameters for the ADO.
The ADO supports asynchronous ASCII operation. A data byte is received
from the terminal or PC, a control byte is added, and the two bytes are
transferred to the associated line card. In the other direction, two data bytes
are received from the line card, the control byte is deleted, and the data byte
is delivered to the terminal in a bit serial format, at the terminal’s bit rate.
ADO external power supply
The ADO requires an external power supply in addition to the power from the
line. See Table 69 on
page 425 . A 110 V AC 60 Hz, 100 V AC 50/60 Hz, or
a 220 V AC 50 Hz multi-output power supply unit provides nominal voltages
of +5 V, +12 V, and –12 V DC. The power supply connects to the back of the
telephone through a 5-pin Molex power connector.
If the AC power supply fails, data calls cannot be processed. All external
power supplies are equipped with short circuit and thermal shutdown
protection.
Table 68
ADO operating parameters
Data type ASCII
Synchronization Asynchronous, Start-Stop
Number of bits 8 bits
Parity none (unchecked)
Data rate 300, 1200, 2400, 4800,
9600, 19200 bits per second (autobaud)
Stop bits 2 bits for 110 bits per second;
1 bit for all other speeds
Transmission Full duplex