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COMMUNICATIONS PROTOCOLS D-13
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data frames are multiplexed into a DCP and DS1 frame.
The state of the status bit along with its transition from one frame to another frame is used to convey the
state of the following RS-449/V.35 signal leads:
• Request to Send (transmit)
• Clear to Send (transmit)
• Send Data (transmit)
• Receiver Ready (receive)
• Receive Data (receive)
DATA mode 1
S
I1 I1 I1
. . .
DATA S DATA S
CONTROL
. . .
F CHANNEL 1 24 F 1 F 1 DS1/DMI/BOS
. . . . . . . . .
I2I1
. . .
I1 I2F I1 I2 F DCP
Figure D-3. Data mode 1 With DCP and DS1/DMI/BOS Frame Multiplexing Arrangements