RC907/908-EV35 User Guide
The following diagram indicates the correct line sequence of crossover UTP cable.
RC907/908-EV35 UTP-RJ45
Host network card RJ45
Pin 1
Pin 1
Pin 2
Pin 2
Pin 3
Pin 3
Pin 6
Pin 6
In these two connection types, Pin 1 and Pin 2 are in a twisted pair, and so are Pin 3
and Pin 6. Since RC907/908-EV35 interface converters support MDI/MDIX
auto-sensing function, users can adopt either kind of the above cables.
4. The V.35 interface adopts HDB26 female connector
，
the definitions are as
follows:
Pin Name
Input/Output
Pin Number
Chassis Ground — CGND
-
1
Signal Ground — GND
-
7
Receive Data (A) — RD(A)
I
3
Receive Data (B) — RD(B)
I
21
Receive Timing (A) — RCK(A)
I
17
Receive Timing (B) — RCK(B)
I
25
Send Data (A) — TD(A)
O
2
Send Data (B) — TD(B)
O
11
Send Timing (A) — TCK(A)
I
15
Send Timing (B) — TCK(B)
I
23
Terminal Timing (A) — SCTE(A)
O
24
Terminal Timing (B) — SCTE(B)
O
16
Request to Send — RTS
O
4
Clear to Send — CTS
I
5
Data Set Ready — DSR
I
6
Data Carrier Detect — DCD
I
8
Data Terminal Ready — DTR
O
20
I—input; O—output
Note: It is strictly forbidden to hot-swap the V.35 interface with power supply
applied!