DataComm V.34 PL, Operation Manual

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Business Equipment Interface (TIA/EIA-232-F, ITU-T V.24/V.28/ISO 2110)
B-2 DataComm V.34 PL Modem 060R115-000
Installation and Operation Issue 1
18 LL 141 ALE To DCE Local Loopback
Signals on this circuit are used to control local loopback.
20 CD 108/1 To DCE Connect Data Set to Line
Signals on this circuit control switching of the signal-conversion or other similar equipment to or from the line.
The On condition causes the DCE to dial a stored phone number and connect the signal-conversion or similar
equipment to the line. The On condition following Ring Indicator causes the DCE to perform automatic answer.
The Off condition causes the DCE to remove the signal-conversion or similar equipment from the line.
20 CD 108/2 DTR To DCE Data Terminal Ready
Signals on this circuit control switching of the signal-conversion or similar equipment to or from the line. The
On condition, indicating that the DTE is ready to operate, prepares the DCE to connect the signal conversion
or similar equipment to the line and maintains this connection after it has been established by supplementary
means. The DTE is permitted to present the On condition on circuit 108.2 whenever it is ready to transmit or
receive data. The Off condition causes the DCE to remove the signal-conversion or similar equipment from the
line.
21 2.5 140 RLE To DCE Remote Digital loopback
The On condition in this circuit will initiate a Remote Digital Loopback test.
22 CE 125 RI From DCE Ring Indicator
The On condition of this circuit indicates that a ringing signal is being received on the communication channel.
The On signal shall appear approximately coincident with the On segment of the ringing cycle (during rings) on
the communication channel.
23 CI 112 TC From DCE Speed Indicator
The On condition indicates that the modem is operating at the highest speed within the selected handshake
mode. The Off condition indicates that a speed lower than the maximum was selected.
24 DA 113 TC To DCE Transmit Clock DTE Source
Signals on this circuit are used to provide the transmitting signal converter with signal element timing in-
formation. The On-to-Off transition shall nominally indicate the center of each signal element on the BA
(Transmit Data) line.
25 TM 142 TME From DCE Test Mode Indicator
The On condition in this circuit indicates a test mode in the DCE, precluding reception or transmission of data
signals from or to a remote DTE. The Off condition indicates that the DCE is not in test mode.
Pin No.
Circuit
Name Direction Function 232-F V.24
Description