Huawei HG8247H Router Manual PDF (Setup & Configuration Guide)

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As shown in

Figure 4-2

, the PPM-350B optical power meter is different from common optical

power meters. Specifically, the PPM-350B has a downstream input optical port and an upstream

input optical port and can display the optical power of three wavelengths: 1310 nm, 1490 nm,

and 1550 nm.

Figure 4-3

shows the common measurement points.

Figure 4-3

Measurement points of the optical power in the GPON network

Maintenance engineers should also know related optical specifications on the ONT side, such

as the maximum output optical power of the 1310 nm wavelength, minimum input optical power

of the 1490 nm wavelength, and receiver sensitivity of the 1490 nm or 1550 nm wavelength.

Table 4-3

lists the optical specifications on the ONT side.

Table 4-3

Optical specifications of optical ports on GPON ONTs

Parameter

Type

Wavelength

(nm)

Unit

Min.

Max.

Upstream data

1310

dBm

+0.5

+5

Downstream

data

1490

dBm

-28

-8

Downstream

CATV

1550

dBm

-8

+2

To use an optical power meter, do as follows:

1.

Connect optical fibers to optical ports correctly in upstream and downstream directions.

2.

Turn on the power supply.

3.

Choose the measurement unit (dB or dBm).

4.

Perform the measurement.

Figure 4-4

shows the measurement interface of the optical power meter.

4 Maintenance and Troubleshooting

EchoLife HG8240/HG8245/HG8247 GPON Terminal

Service Manual

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Figure 4-4

Measurement interface of the optical power meter

Optical channel loss is the total insertion loss caused by optical fibers, optical splitters, optical

fiber connectors, and fiber connection points.

Table 4-4

shows the estimation of optical channel

loss in the engineering design.

Table 4-4

Optical loss parameters in engineering

Item

Average Loss (dB)

Connection

point

Connector

0.3

Mechanical

splicing

0.2

Fusion splicing

0.1

Optical splitter

1:64

19.7

1:32

16.5

1:16

13.5

1:8

10.5

1:4

7.2

1:2

3.2

Optical fiber (G.

652)

1310 nm (1 km)

0.35

1490 nm (1 km)

0.25

Optical channel loss = L x a + n1 x b + n2 x c + n3 x d + e + f (dB)

EchoLife HG8240/HG8245/HG8247 GPON Terminal

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NOTE

l

a indicates the average loss of an optical fiber per kilometer (unit: dB/km). L indicates the total length

of the optical fiber (unit: km). The loss of patch cords and pigtail fibers used in engineering can be

ignored because they are usually very short.

l

b indicates the loss of a fusion splicing point (unit: dB) and n1 indicates the number of fusion splicing

points.

l

c indicates the loss of a mechanical splicing point (unit: dB) and n2 indicates the number of mechanical

splicing points.

l

d indicates the loss of a connector (unit: dB) and n3 indicates the number of connectors.

l

e indicates the loss of an optical splitter (unit: dB). Only 1-level optical splitting is considered here. In

the case of 2-level optical splitting, the loss of two optical splitters must be considered.

l

f indicates the engineering margin. Generally, the value is 3 dB.

4.4 Remote Maintenance and Troubleshooting on the Web

Page

This topic describes how to remotely maintain and troubleshoot the ONT on the Web page.

4.4.1 Remotely Logging in to the Web Page

By remotely logging in to the Web page, maintenance engineers can perform maintenance and

troubleshooting without any site visit.

4.4.1 Remotely Logging in to the Web Page

By remotely logging in to the Web page, maintenance engineers can perform maintenance and

troubleshooting without any site visit.

Prerequisite

l

The OLT and the NMS communicate with each other properly.

l

The NMS is able to discover an online ONT and Layer 2 service channels between the OLT

and the ONT are enabled.

Impact on the System

CAUTION

Exercise caution when remotely logging in to the Web page because it deteriorates ONT security.

Procedure

Step 1

In the

Physical Map

navigation tree on the

Main Topology

tab page, double-click the target

OLT, or select the target OLT, right-click, and choose

NE Explorer

.

Step 2

In the navigation tree, choose

GPON

>

GPON ONU

.

Step 3

On the

GPON ONU

tab page, set the search criteria to find the GPON ONU records.

4 Maintenance and Troubleshooting

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Step 4

Select a required record from the ONT list, right-click, and choose

Configure Value-Added

Service

from the shortcut menu.

Step 5

Configure static WAN parameters.

In the navigation tree, choose

WAN Device

>

WAN Device 1

>

WAN Connection

. Select

WAN Connection

, right-click, and choose

Add IP Connection

from the shortcut menu. Select

WAN IP Interface1

and add a static WAN interface.

l

Set

WAN Interface Name

, which identifies a WAN interface and can be specified freely.

l

Set

WAN Enable

to

enable

.

l

Set

Connection Type

to

IP_Routed

.

l

Set

Vlan ID

the same as the CVLAN ID of the traffic streams configured on the OLT.

l

Set

Addressing Type

to

Static

and set

IP Address

,

Subnet Mask

, and

Default Gateway

.

l

Set

Service Type

to

INTERNET

.

For details, see

Figure 4-5

.

Figure 4-5

Configuring static WAN parameters

EchoLife HG8240/HG8245/HG8247 GPON Terminal

Service Manual

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Step 6

Enable the access rights on the WAN.

In the navigation tree, choose

Security

>

ACL Services

. On the right pane, set

HTTP WAN

Enables

to

enable

.

For details, see

Figure 4-6

.

Figure 4-6

Enabling the access rights on the WAN

----End

Result

Enter the configured static IP address in the address bar of the Internet Explorer. The login Web

page is displayed. Enter the user name and password (the default user name is

telecomadmin

and the default password is

admintelecom

). The configuration page is displayed.

4.5 Maintenance and Troubleshooting on the NMS

This topic describes how to maintain and troubleshoot the ONT on the NMS.

4 Maintenance and Troubleshooting

EchoLife HG8240/HG8245/HG8247 GPON Terminal

Service Manual

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Issue 04 (2011-01-12)

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