Communications - OKIDATA OF1000 Service Manual

1.3 COMMUNICATIONS

1.3.01 Telephone Line Compatibility
· PSTN (public switched telephone network)
· PBX (private branch exchange)
1.3.02 Communication Mode
· Half Duplex
1.3.03 Protocol
· CCITT Recommendation T.30
· Oki Special Protocol
· Oki Special High Speed
1.3.04 Line Interface
· Impedance
· Send Power Level
1.3.05 Ring Signal Detection Sensitivity
· Voltage Range
· Frequency Range
· Ring Signal Detection Time
· Ring Signal Voltage Duration
1.3.06 Coding Schemes
· Modified Huffman (MH) Only
· Modified-Modified Read (MMR)
· Modified Huffman (MH)
In multi-document reception, the local unit can start transmitting
the modem training bits immediately after transmitting end of
message (EOM) and upon reception of message confirmation (MCF)
from the remote unit, instead of repeating all procedures (which takes
about six seconds).
The T.30 handshake is conducted at message transmission speed
(instead of 300 bps) during multi-page transmission.
600 ohms balanced
0 dbm to -15 dbm (can be adjusted in 1 dbm steps by modifying TF #21)
25 to 150 r.m.s.
15 to 68 Hz (with 44 to 56 volts superimposed)
One Ring Signal
or
Adjustable between 5 and 30 seconds, in 5 second increments
Refer to User Function 24 (optional second tray installed)
Refer to User Function 23 (optional second tray NOT installed)
Longer than 180 milliseconds (inoperative if duration is
90 milliseconds or less)
Service Guide OF1000
Chapter 1 Product Specifications
Page: 5