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Step 4
Check whether the mains supply is normal (whether the mains supply meets the requirements
for Huawei's product).
----End
6.3.2 PON LED Off
This topic describes how to locate the fault when the PON LED does not illuminate.
Procedure
Step 1
Check whether the OPTICAL interface on the ONT rear panel is connected to the optical fiber
properly.
Step 2
Check whether the GPON ONT fails to register with the OLT. If such a problem occurs, contact
the service provider for help.
----End
6.3.3 LOS LED Blinking
This topic describes how to locate the fault when the LOS LED blinks.
Procedure
Step 1
Check whether the optical fiber is connected properly.
Step 2
Check whether the optical fiber connector is clean.
----End
6.3.4 LAN LED Off
This topic describes how to locate the fault when the LAN LED does not illuminate.
Procedure
Step 1
Check whether the network cables match the device.
Step 2
Check whether the network cables are properly connected.
Step 3
Check whether the LED of the network interface card (NIC) is normal.
If the LINK LED is always on, it indicates that the network cables are properly connected. If
the ACT LED blinks, it indicates that data is being transmitted.
Step 4
Check whether the NIC works in the normal state.
In
Device Manager
of the Windows operating system, check whether there is a device marked
with
?
or
!
under
Network Adapter
. If there is a device marked with
?
or
!
under
Network
Adapter
, uninstall the NIC and then re-install it, or install the NIC in another slot. If the problem
persists, replace the NIC.
----End
6.3.5 TEL LED Off
This topic describes how to locate the fault when the TEL LED does not illuminate.
6 Troubleshooting
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
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Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-01-26)
Page 227 / 232
Procedure
Step 1
Check whether a voice user is configured and enabled.
----End
6.3.6 USB LED Off
This topic describes how to locate the fault when the USB LED does not illuminate.
Procedure
Step 1
Check whether the USB storage device is correctly connected.
----End
6.3.7 WLAN LED Off
This topic describes how to locate the fault when the WLAN LED does not illuminate.
Procedure
Step 1
Check whether the ONT is correctly connected to the power supply.
If the POWER LED is always on, it indicates that the ONT is correctly connected to the power
supply.
Step 2
Check whether the Wi-Fi function is correctly configured and enabled.
Step 3
Check whether the Wi-Fi terminal is correctly configured and whether its connection to the
ONT is set up.
----End
6.3.8 WPS LED Off
This topic describes how to locate the fault when the WPS LED does not illuminate.
Procedure
Step 1
Check whether the ONT is correctly connected to the power supply.
If the POWER LED is always on, it indicates that the ONT is correctly connected to the power
supply.
Step 2
Check whether the Wi-Fi function is correctly configured.
Step 3
Check whether the WPS button is pressed.
Step 4
Check whether the WPS function is enabled.
----End
6.3.9 CATV LED Off
This topic describes how to locate the fault when the CATV LED does not illuminate.
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
6 Troubleshooting
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Copyright © Huawei Technologies Co., Ltd.
6-11
Page 228 / 232
Procedure
Step 1
Contact the service provider to check whether the CATV service is provisioned.
Step 2
Check whether the optical fiber is properly connected.
Step 3
Measure the optical power of the downstream 1550 nm wavelength by using an optical power
meter. Check whether the measured optical power complies with the optical specifications of
optical ports on GPON ONTs as specified in
6.2.2 Optical Power Meter
.
l
If the measured optical power complies with the specifications, proceed to the next step.
l
If the measured optical power does not comply with the specifications, check whether the
endface of the optical fiber connected to the ONT is contaminated. If it is contaminated, wipe
the endface of the optical fiber in a unidirectional manner with paper that is specially used
for cleaning optical fibers or lens of cameras.
Step 4
Check whether the combiner works in the normal state.
----End
6 Troubleshooting
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
6-12
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-01-26)
Page 229 / 232
7
Technical Specifications
About This Chapter
This topic describes the technical specifications of the ONT, include its physical specifications
and the standards and protocols which the ONT complies with.
7.1 Physical Specifications
This topic describes the physical specifications of the ONT, including its dimensions, weight,
voltage range, and environment parameters.
7.2 Protocols and Standards
This topic provides the protocols and standards which the ports of the ONT comply with.
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
7 Technical Specifications
Issue 02 (2011-01-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7-1
Page 230 / 232
7.1 Physical Specifications
This topic describes the physical specifications of the ONT, including its dimensions, weight,
voltage range, and environment parameters.
Table 7-1
lists the physical specifications of the HG8240/HG8245/HG8247.
Table 7-1
Physical specifications
Item
HG8240
HG8245
HG8247
Dimensions (length x
width x depth)
195 mm x 155 mm x
34 mm
195 mm x 174 mm x
34 mm
268 mm x 213 mm x
34 mm
Weight (including the
power adapter)
About 500 g
About 550 g
About 800 g
Overall system power
supply
11-14 V DC, 1 A
11-14 V DC, 2 A
11-14 V DC, 2 A
Power adapter input
range
100-240 V AC,
50-60 Hz
100-240 V AC,
50-60 Hz
100-240 V AC,
50-60 Hz
Typical power
consumption
8W
9W
12W
Temperature range
0°C to +40°C
0°C to +40°C
0°C to +40°C
Humidity range
5%-95% (non-
condensing)
5%-95% (non-
condensing)
5%-95% (non-
condensing)
7.2 Protocols and Standards
This topic provides the protocols and standards which the ports of the ONT comply with.
l
GPON: ITU-T G.984
l
VoIP: H.248, SIP, G.711A/u, G.729a/b, and T.38
l
Multicast: IGMPv2, IGMPv3, and IGMP snooping
l
Routing: NAT, NAPT, and ALG
l
Ethernet: IEEE 802.3ab
l
USB: USB 1.1/USB 2.0
l
Wi-Fi: IEEE 802.11n
NOTE
The USB protocol and Wi-Fi protocol are applicable to the HG8245 and HG8247 only.
7 Technical Specifications
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
7-2
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-01-26)

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