Huawei SmartAX MA5612 - 8 Common Operation

8 Common Operation
About This Chapter
This topic describes the prerequisite, tools, impact on the system, and procedure of common
operations of the device.
8.1 Performing a Loopback on an E1 Line
The E1 line loopback is also called the 2M link physical loopback. When the services carried
on an E1 port are abnormal, you can perform a loopback on the E1 line to check whether the E1
port is normal and whether the internal communication of the system is normal.
8.2 Performing a Loopback on an E1 Port
When the services carried on an E1 port are abnormal, you can perform a loopback on the E1
port to locate a fault. When the result of the 8.1 Performing a Loopback on an E1 Line is
abnormal, you can perform this operation to further locate the fault.
8.3 POTS Subscriber Circuit Line Test
The POTS subscriber circuit line test is used to test certain functions (such as ringing, power
feeding, and dialing tone) and parameters (such as feed voltage and ringing current voltage) of
the internal circuit of the board. The test result is used to locate faults.
8.4 POTS Subscriber Loop Line Test
The POTS subscriber loop line test is used to test the performance or indexes (such as the
capacitance and resistance between lines) of the subscriber loop line. The test result is used to
check whether the subscriber loop line is faulty.
8.5 POTS Subscriber Search Tone Test
The search tone test allows an MA5612 to send a voice signal with a certain frequency and
amplitude to a plain old telephone service (POTS) line. A maintenance engineer then checks
whether the POTS line receives the signal on the peer side using a phone receiver or other special
instrument. This method helps to determine whether the line is faulty. In addition, the search
tone test helps to locate a specific line among multiple lines.
8.6 POTS Subscriber Signal Tone Test
A signal tone test emulates a plain old telephone service (POTS) user's off-hook, triggering the
system to send a test tone signal to a port on a voice service board. The port then sends the signal
back to the system. By detecting the sent-back test tone signal, engineers can determine whether
the system has processed the user off-hook operation and detected test tone signals properly,
SmartAX MA5612 Multi-service Access Module
Maintenance Guide 8 Common Operation
Issue 01 (2012-07-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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