X.21 DCE Cable Pinouts for the 8-Port Serial Gigabit-Backplane Physical Interface Module

Table 1 gives the X.21 DCE cable pinouts for the 8-Port Serial Gigabit-Backplane Physical Interface Modules.

Table 1: X.21 DCE Cable Pinouts for the 8-Port Serial GPIM

VHDCI-68 Pin	DB-15 (1) Pin	DB-15 (2) Pin	Dir	Pair	Pairing	Description
T37	1					Shield Ground
T41	2		I	Pair 1	T39	Receive Data (A)
T42	3		I	Pair 2	T40	Clear to Send (A)
T16	4		O	Pair 3	T14	Send Data (A)
T50	5		O	Pair 4	T48	Request to Send (A)
T4	6		O	Pair 5	T2	Terminal Timing (A)
T51	8					Shield Ground
T39	9		I	Pair 1	T41	Receive Data (B)
T40	10		I	Pair 2	T42	Clear to Send (B)
T14	11		O	Pair 3	T16	Send Data (B)
T48	12		O	Pair 4	T50	Request to Send (B)
T2	13		O	Pair 5	T4	Terminal Timing (B)
T35 to T33						Protocol Identifier_2
T52		1				Shield Ground
T59		2	I	Pair 1	T57	Receive Data (A)
T60		3	I	Pair 2	T58	Clear to Send (A)
T34		4	O	Pair 3	T32	Send Data (A)
T68		5	O	Pair 4	T66	Request to Send (A)
T22		6	O	Pair 5	T20	Terminal Timing (A)
T55		8				Shield Ground
T57		9	I	Pair 1	T59	Receive Data (B)
T58		10	I	Pair 2	T60	Clear to Send (B)
T32		11	O	Pair 3	T34	Send Data (B)
T66		12	O	Pair 4	T68	Request to Send (B)
T20		13	O	Pair 5	T22	Terminal Timing (B)
T53 to T52						Protocol Identifier_2