Ericsson ZAT 19.2 Operation Manual page 292

45. Technical data -
Circuit 115 Receiver signal element timing DTE<-DCE
ITU-T name: RCK RS232C name.DD Pin no..17
During synchronous transmission, the receive signal element
timing is presented by the DCE on circuit 115. This square wave
signal synchronises DTE with the data flow on circuit 104. The
OFF to ON transition will normally indicate the centre of each
signal element on circuit 104 (RXD). See figure!
Data signal 103, 104
| Bun Bins Bilne2 Bitns3
Timing signal 113,114,115
125 Calling indicator DTE<-DCE
ITU-T name: RIR RS232C name:CE Pin no.:22
This circuit indicates that DCE has received a call.
State ON: Call received
State OFF: No call received.
126 Select transmit channel DTE- >DCE
ITU-T name:STF RS232C name: Pinno.:11
State ON: Modem uses answer channel.
State OFF: Modem uses originate channel.
140 Remote Loop control DTE->DCE
ITU-T name: RL RS232C name: Pin. no.:21
State ON __ Initiate remote loop 2 test condition.
State OFF: Release of remote loop 2 condition. Normal
datatransmission can take place.
141. Local Loop Control DTE->DCE
ITU-T name: LL RS232C name: Pin. no.:18
State ON: The modem establishes local loop 3 test condition.
State OFF: Release of loop 3 condition.
142 Local Indicator Test DTE<-DCE
ITU-T name: Tl RS232C name: Pin. no. :25
State ON : Indicates test condition in the modem
State OFF: Indicates normal condition.
1 5-4 LZTR104006 R1.00
Zat14.4/14.4-7 and 19.2/19.2-7