Raisecom RC801-30B-FV35 series, User Manual

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Raisecom Technology Co., Ltd.
http://www.raisecom.com
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3.3.2 The 7
th
and 8
th
Bits: Vacant
These two bits are vacant and reserved for further use.
3.3.3 The Factory Default Status of SW2: All OFF
Switch 1
st
bit 2
nd
bit 3
rd
bit 4
th
bit 5
th
bit 6
th
bit 7
th
bit 8
th
bit
Status OFF OFF OFF OFF OFF OFF OFF OFF
Definition
TX CLK
positive
RX CLK
positive
PCM31
CRC
Enable
Not
loop-back
Remote
loop-back
Vacant
Chapter 4. Installation and Troubleshooting
This chapter is for the reference for technical person. If it is the first time using this equipment,
please carefully read Chapter 3 first.
4.1 Cautions before Applying the Power Supply
‹
It is strictly forbidden to hot-swap the V.35 interface cable.
‹
If adopts the DC –48V power supply, please first connect the Protecting Ground (the middle
pin); then the 0V pin (the right pin, high electrical potential); at last the –48V pin (left pin,
low electrical potential). They must not be reversely connected.
4.2 Connection Diagnosis
LERR or RERR indicator may be ON when just after connecting the optical fiber. This is because
a few error bits are generated by connecting cables. LERR and RERR indicators shall be OFF in
10~20 seconds.
‹
Check if there is any alarm on local equipment
‹
Test if data communication can be performed between local DTE and remote equipment
If the test is failed, please try the following steps.
1. Local V.35 interface loop-back. Refer to previous dip-switch setup for details. If the Router
indicates loop-back successful, the V.35 interface is working in good condition. If the Router
indicates loop-back fails, please first check the timing resource and bandwidth setup at local
site, and try to adjust the TX CLK and RX CLK phase option switch.
2. After the success of the first step, check if the optical link works in good condition. If
RC801-30B-FV35 modems work in pairs (or adopts RC802-30B-FV35 at the remote site),
users are advised to perform the remote loop-back test. The local Router shall indicate if the
remote loop-back in optical link is successful.