Raisecom Technology Co., Ltd.
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of different brand name at optical interface, there also may be LLOF alarm.
Optical Interface LERR (RERR) is ON.
Answer: When flashing, the bit error rate of optical signal is above 10
-3
. Please check if the optical
interface is connected properly, or the receiving optical power, and also ensure there is no sharp
turn of the optical fiber. When steady on, the bit error rate of optical signal is above 10
-6
. This
alarm may be appearing just after applying the power supply, which is normal phenomenon, and it
shall be off in 10 seconds. If the indicator is steady on during operation, please check if the optical
interface is connected properly and the receiving optical power.
Severe packet loss of DTE equipment
Answer: The possible reasons for severe packet loss are
：
1
．
Incorrect timing resource setup
2
．
Check V.35 interface status of the Router, if there are data errors on input and output, then it
indicates that TX CLKand RX CLK phase relationship need to be adjusted. This problem can
be located by performing local V.35 interface loop-back test.
3
．
Cable loose.
Compatibility with similar equipment of other brands
Answer: Raisecom RC801-30B-FV35 cannot cooperate with similar products of other brands. It is
because the signal coding and protocols at optical interface are different. However, users can refer
to Chapter 2.3 for details of extended connection types.
Compatibility with other Raisecom V.35 interface equipment
Answer: RC801-30B-FV35 can cooperate with other Raisecom V.35 interface equipments that
have similar functions, such as followings:
1.
RC903-V35FE1 standalone V.35 to fractional E1 interface converter
2.
RC904-V35FE1 modular V.35 to fractional E1 interface converter
3.
SUBM-FV35 N*64kbps V.35 interface expansion module that installed into
RC801-240B series standalone fiber optic multiplexer.
