Specifications
Table Of Contents
- AR Router Hardware Reference
- Copyright
- Contents
- Introduction
- Models Covered By This Reference
- Where To Find More Information
- Using Windows Terminal and Windows Hyperterminal
- Router Start-up
- Online Documentation
- AT-TFTP Server
- Memory
- AR300 Series Routers
- AR400 Series Routers
- AR700 Series Routers
- AT-RPS 740
- Mini Accelerator Cards (MACs)
- PCI Accelerator Cards (PACs)
- Flash Memory
- Interfaces
- Test Facility
- Cables And Loopback Plugs
- PICs and NSMs
- Restricted Procedures
- Contacting Us

80 AR Router
C613-03058-00 REV A
Figure39: Pin wiring diagram for a V.35 DCE transition cable to an AMPLIMITE 50-
way connector.
D50 SCSI-2 Male
(to router)
M34 Female
(to DTE)
Cable Shield
Insulating
Sheath
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)
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 26 Pin 50
Pin 1 Pin 25
D50 SCSI-2 Male — Pin View
Pin NN
Pin LL
Pin MM
Pin KK
M34 Female — Pin View
Ferrite
Cable
Pin B
Pin D
Pin A
Pin C
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.
A50V35C