Raisecom Technology Co., Ltd.
http://www.raisecom.com
- 10 -
LERR. Local receiving bit error alarm in optical link (yellow): Flashing, when the bit error
rate exceed 10
-3
in local receiving optical link; steady on and refreshes every other 10~20
seconds, when the bit error rate exceed 10
-6
.
RERR. Remote receiving bit error alarm in optical link (yellow): Flashing, when the bit error
rate exceed 10
-3
in remote receiving optical link; steady on and refreshes every other 10~20
seconds, when the bit error rate exceed 10
-6
.
LAL and RAL indicators are used to check the E1 signals that are generated from the optical
receiving link. In the extended connection solutions in Chapter 2.3, if errors occur at the remote
transmit and receive link, then LAL and RAL can be used to indicate this alarm. If users do not
adopt Raisecom V.35 to fractional E1 interface converter (i.e. RC903-V35FE1), then the RAL
indicator is invalid.
3.1.2 V.35 (DCE) Interface
V.35 interface adopts V.35/ISO2593: DCE Connector Face – 34-pin Female connector. It can be
connected by standard DTE cable. The definitions of the pins are as follows:
Pin Name
Input/Output
Pin Number
Chassis Ground — CGND
-
A
Signal Ground — GND
-
B
Receive Data (A) — RD(A)
O
R
Receive Data (B) — RD(B)
O
T
Receive Timing (A) — RCK(A)
O
V
Receive Timing (B) — RCK(B)
O
X
Send Data (A) — TD(A)
I
P
Send Data (B) — TD(B)
I
S
Send Timing (A) — TCK(A)
O
Y
Send Timing (B) — TCK(B)
O
AA
Terminal Timing (A) — SCTE(A)
I
U
Terminal Timing (B) — SCTE(B)
I
W
Request to Send — RTS
I
C
Clear to Send — CTS
O
D
Data Set Ready — DSR
O
E
Data Carrier Detect — DCD
O
F
Data Terminal Ready — DTR
I
H
I --- input; O --- output.
