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CIRCUIT DB - TRANSMIT SIGNAL ELEMENT TIMING (DCE SOURCE)
CONNECTOR NOTATION:TXCLK (DCE)
DIRECTION: From DCE
This signal, generated by the DCE, provides the DTE with element timing information
pertaining to the data transmitted to the DCE. The DCE can use this information for its
received data.
CIRCUIT DD - RECEIVER SIGNAL ELEMENT TIMING (DCE SOURCE)
CONNECTOR NOTATION: RXCLK (DCE)
DIRECTION: From DCE
This signal, generated by the DCE, provides the DTE with element timing information
pertaining to the data transmitted by the DCE. The DTE can use this information for its
received data.
CIRCUIT LL - LOCAL LOOPBACK
CONNECTOR NOTATION: LLBK
DIRECTION: To DCE
This signal provides a means whereby a DTE may check the functioning of the DTE/DCE
interface and the transmit and receive sections of the local DCE.
CIRCUIT RL - REMOTE LOOPBACK
CONNECTOR NOTATION: RLBK
DIRECTION: To DCE
This signal provides a means whereby a DTE or a facility test center may check the
transmission path up to and through the remote DCE to the DTE interface and the similar
return transmission path.
CIRCUIT TM - TEST MODE
CONNECTOR NOTATION: TEST MODE
DIRECTION: From DCE
This signal indicates to the DTE that the DCE is in a test condition. The DCE generates
this signal when it has received a local loopback or remote loopback signal from the
DTE.