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

Table 107 gives the X.21 DTE cable pinouts for the 8-Port Serial Gigabit-Backplane Physical Interface Modules.

Table 107: X.21 DTE 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
T16	2		O	Pair 1	T14	Send Data (A)
T50	3		O	Pair 2	T48	Request to Send (A)
T41	4		I	Pair 3	T39	Receive Data (A)
T42	5		I	Pair 4	T40	Clear to Send (A)
T38	6		I	Pair 5	T36	Receive Timing (A)
T51	8					Shield Ground
T14	9		O	Pair 1	T16	Send Data (B)
T48	10		O	Pair 2	T50	Request to Send (B)
T39	11		I	Pair 3	T41	Receive Data (B)
T40	12		I	Pair 4	T42	Clear to Send (B)
T36	13		I	Pair 5	T38	Receive Timing (B)
T35 to T33						Protocol Identifier_2
T1 to T3						Protocol Mode
T52		1				Shield Ground
T34		2	O	Pair 1	T32	Send Data (A)
T68		3	O	Pair 2	T66	Request to Send (A)
T59		4	I	Pair 3	T57	Receive Data (A)
T60		5	I	Pair 4	T58	Clear to Send (A)
T56		6	I	Pair 5	T54	Receive Timing (A)
T55		8				Shield Ground
T32		9	O	Pair 1	T34	Send Data (B)
T66		10	O	Pair 2	T68	Request to Send (B)
T57		11	I	Pair 3	T59	Receive Data (B)
T58		12	I	Pair 4	T60	Clear to Send (B)
T54		13	I	Pair 5	T56	Receive Timing (B)
T53 to T52						Protocol Identifier_2
T19 to T18						Protocol Mode