DataComm V.34 PL, Operation Manual

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060R115-000 DataComm V.34 PL Modem B-1
Issue 1 Installation and Operation
Appendix B:
Business Equipment Interface
(
TIA/EIA-232-F, ITU-T V.24/V.28/ISO 2110)
Pin No.
Circuit
Name Direction Function 232-F V.24
Description
2 BA 103 SD To DCE Transmitted Data
Data signals originated by the DTE - to be transmitted to a remote data station via a data channel, or to be
passed to the DCE for maintenance test purposes under control of the DTE - are transferred to the DCE on
this circuit.
3 BB 104 RD From DCE Received Data
Data signals generated by the DCE - in response to data channel line signals received from a remote data
station, or in response to DTE maintenance test signals - are transferred to the DTE on this circuit.
4 CA 105 RTS To DCE Request to Send
Signals on this circuit control the data transmit function of the DCE. The On condition causes the DCE to
assume the data channel transmit mode. The Off condition causes the DCE to assume the data channel non-
transmit mode when all data transferred on circuit 103 has been transmitted.
5 CB 106 CTS From DCE Clear to Send
Signals on this circuit indicate whether the DCE is ready to transfer data. The On condition indicates that the
signal converter or similar equipment is connected to the line and that the DCE is ready to initiate transfer of
data. The Off condition indicates that the DCE is not ready to transfer data.
6 CC 107 DSR From DCE Data Set Ready
Signals on this circuit indicate whether the DCE is ready to operate. The On condition indicates that the signal
converter or similar equipment is connected to the line and that the DCE is ready to exchange further control
signals with the DTE to initiate transfer of data. The Off condition indicates that the DCE is not ready to
operate.
7 AB 102 SIG GND Signal Ground
This pin is the signal ground reference for the V.24 interface circuits.
8 CF 109 CO/DCD From DCE Data Channel Receive Line
Signal Detect
Signals on this circuit indicate whether the receive data channel line signal is within appropriate limits, as
specified in the relevant recommendation for DCE. The On condition indicates that the received signal is within
appropriate limits. The Off condition indicates that the received signal is not within the appropriate limits.
15 DB 114 SC From DCE Transmit Clock DCE Source
Signals on this circuit are used to provide the data terminal equipment with signal element timing information.
The data terminal equipment shall provide a data signal on the Transmit Data line in which the transitions
between signal elements nominally occur at the time of the Off-to-On transitions of the signal on the DB circuit.
17 DD 115 RC From DCE Received Clock
Signals on this circuit are used to provide the data terminal equipment with received signal element timing
information. The On-to-Off transition shall nominally indicate the center of each signal element on the BB
(Received Data) circuit.