Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual page 34

34
Figure 19: Pin wiring diagram for a V.35 DCE transition cable to an AMPLIMITE 50-way
connector
D50 SCSI-2 Male
(to router)
Connect to backshell
1
←
TD 12
37
→
TC 20
45
→
RD 2
27
←
CTS 3
←
DSR 4
→
RTS 14
→
DTR 13
→
RL 15
FGND 46
FSELB 47
FGND 21
FSELC 23
Pin 1 Pin 25
Pin 26 Pin 50
D50 SCSI-2 Male — Pin View
Notes:
(1) → Output from router; ← Input to router.
(2) Use shielded cable with twisted pairs. Twisted pairing must be 1-26, 2-27,
3-28, etc.
(3) M34 connector shells must be metallised. Connect braid to connector shells to make a
360° connection.
(4) Standard cable length is 2.05m ± 0.05m.
(5) Ferrite must be fitted to cable no more than 25mm from rear of D50 SCSI-2 backshell.
(6) See accompanying text for information about earth loop conditions.
(7) Cable version 2.0.
Insulating
Sheath
Cable Shield
Ferrite
Cable
Port Interface Card
M34 Female
(to DTE)
A Shield
B SIG G
R RDA (104)
T RDB
Y TCA (114)
AA TCB
P SDA (103)
S SDB
V RCA (115)
X RCB
C RTS (105)
H DTR (108)
D CTS (106)
E DSR (107)
F DCD (109)
Pin KK Pin C
Pin MM Pin A
Pin LL Pin D
Pin NN Pin B
M34 Female — Pin View
A50V35C
C613-03023-00 REV J