Huawei V200R001C01 - 6.1.2 No Dial Tone Is Heard After Offhook

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A->ground AC voltage (V) 0.500
B->ground AC voltage (V) 0.400
A->B AC voltage (V) 0.000
A->ground DC voltage (V) -7.809
B->ground DC voltage (V) -9.657
A->B DC voltage (V) 1.848
A->ground insulation resistance (ohm) >10M
B->ground insulation resistance (ohm) >10M
A->B insulation resistance (ohm) 123.700K
A->B loop resistance (ohm) 0
A->B polarity reversal resistance(ohm) 0
A->ground capacitance (uF) 0.000
B->ground capacitance (uF) 0.000
A->B capacitance (uF) 0.000
Conclusion Phone not connected
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l If the Conclusion field is not displayed as Normal, rectify the fault on the external line.
l If the Conclusion field is displayed as Normal, go to step 4.
Step 4 Collect the following information and contact Huawei technical support personnel.
l Results of the preceding troubleshooting procedure
l Configuration files, log files, and alarm files of the AR2200-S
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Relevant Alarms and Logs
Relevant Alarms
None.
Relevant Logs
None.
6.1.2 No Dial Tone Is Heard After Offhook
Common Causes
This fault is commonly caused by one of the following:
l The subscriber line is faulty.
l The interface card connected to the telephone fails to be registered.
l The SRU is faulty.
Troubleshooting Flowchart
Figure 6-2 shows the troubleshooting flowchart.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 6 Voice
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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