Cisco Systems MGX 8230 manual 12IN1-S4 V.35/X.21 Back Card, Signal Name Source

Appendix B Cable Specifications

Frame Relay Cabling

12IN1-S4 V.35/X.21 Back Card

The back card for the MGX-FRSM-HS1/B is the 12IN1-S4. Each port on the back card connects through a DTE version or DCE version of the Cisco 12IN1 cable. For the signals on the back card, see Table B-7and Table B-8.The tables show the signal acronym, signal name, and signal source. The signal depends whether the backcard connector is either DTE or DCE and whether the backcard has been set as either X.21 or V.35 as shown in Table B-6.For the part numbers of the standard and non-standard versions of the 12IN1 cables, see Table B-9.

Table B-6 12IN1-S4 cable types

Cable Type	X.21	V.35
DCE	X.21 DCE	V.35 DCE
DTE	X.21 DTE	V.35 DTE

Note The cable type and part number are printed on a plastic band located near the smaller connector.

Table B-7	V.35 signals
Signal		Name	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

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
B-4	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001