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+
Tr
OTXD/RXD-
Transmit -
O_RTS/CTS+
C
O_RTS/CTS-
Control -
I_RDX/TXD+
R
I_RXD/TXD-
Receive -
ICTS/RTS+
Indi
I_CTS/RTS-
Indication -
I_RXC/TXCE+