Beijing Huahuan Electronics Co., Ltd
Huahuan
- 12 - TDMUX-16 User Manual V1.2
2. Uplink interface connect with the Ethernet interface of wireless bridge
we need to use straight cable.
Warning: When connecting to a wireless LAN bridge, the uplink Ethernet
cable often connects to the outdoor unit, posing danger to lightning strikes that can
seriously damage the equipment. To protect the equipment as well as people, surge
protection devices with good earth connection is strongly recommended. Poor earth
connection may also hinder the operation of the Ethernet port, causing severe packet
losses.
4.
Troubleshooting
This paragraph describes common mistakes and faults that may occur during
installation and maintenance. Please seek support from Beijing Huahuan Electronics
Co., Ltd for other problems.
4.1
E1/T1 Alarms LED on
There are two groups of LEDs, PKT LOS and LOS for E1/T1 alarms LEDs.
When E1/T1 LOS LED is on, loss of E1/T1 signal fault is detected by EthMux.
Possible causes include:
z
The downstream equipment such as telephone exchange or PCM terminal
is powered off.
z
The E1/T1 cable connection looses or broken.
E1/T1 LOS LED blinks when respective input E1/T1 signal is AIS, i.e. the
content of E1 data is all 1’s. Such alarm indicates fault conditions on the part of the
downstream equipment.
E1/T1 LOS site is controlled by Dip Switch RA state. When RA Dip Switch ON,
the
red LEDs indicate
remote
E1 LOS state.
When RA Dip Switch OFF, the
red LEDs
indicate
local
E1 LOS state.
The E1 PKT LOS lights are
packet loss indicator, On for Ethernet packet loss, Blink
for E1 Packet Loss, Off for Normal.
4.2
Lnk/Act LED off
Lnk/Act LED off means the corresponding Ethernet link is not working. Check
the Ethernet cable connection, and the status of the device on the other end of the
cable.
4.3
Ready LED does not blink
After power on, the Ready LED should start to blink. If not, try switch power