Nortel Meridian 1 Description page 88

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553-3001-108 Standard 9.00 April 2000
ADO operating parameters
Table 10 shows the operating parameters ADO requires.
Table 10
ADO operating parameters
Data type
Synchronization
Number of bits
Parity
Data rate
Stop bits
Transmission
The ADO supports asynchronous ASCII operation. A data byte is received
from your terminal or personal computer, 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 your 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 11). 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.
ASCII
Asynchronous, Start-Stop
8 bits
none (unchecked)
300, 1200, 2400, 4800,
9600, 19200 bits per second (autobaud)
2 bits for 110 bits per second;
1 bit for all other speeds
Full duplex