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B-20
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Appendix
Frame Relay Cabling
Table B-25 V.35 Signals
Acronym Signal Name
Signal
Source
RTS Request to Send DTE
DTR Data Terminal Ready DTE
CTS Clear To Send DCE
DSR Data Set Ready DCE
DCD Data Carrier Detect DCE
GND Ground both
B_LL Local Loopback DTE
GND Ground both
TxD+ Transmit Data DTE
TxD– Transmit Data DTE
RxD+ Receive Data DCE
RxD– Receive Data DCE
TXCE Secondary Clear to Send DTE
TXCE Secondary Clear to Send DTE
RxC+ Receive Clock DCE
RxC– Receive Clock DCE
TxC+ Transmit Clock DCE
TxC– Transmit Clock DCE
Table B-26 X.21 Signals
Signal Name
Mode_2 Local connections
Mode_DCE Local connections
Ground Shield Ground
O_TXD/RSC+ Transmit +
OTXD/RXD- Transmit -
O_RTS/CTS+ Control +
O_RTS/CTS- Control -
I_RDX/TXD+ Receive +
I_RXD/TXD- Receive -
ICTS/RTS+ Indication +
I_CTS/RTS- Indication -
I_RXC/TXCE+ Timing +