Q2: Why Do I Hear A Fast Busy Tone After I Pick Up The Phone (Even Though All Sip Parameters Have Been Configured); Figure 8: Verifying Sip User Registration In The Web Interface; Figure 9: Verifying Sip Proxy User Name And Password In The Web Interface - AudioCodes MP-20 Series Frequently Asked Questions Manual

Q2: Why do I hear a fast busy tone after I pick up the phone (even though all SIP parameters
have been configured)?
A: The fast busy tone heard after the phone is off-hooked may be caused by the following:
The SIP user is not registered. To check if your user is registered, perform the following:
a) Logon to the Web interface.
b) Access the 'System Monitoring' screen (System Monitoring menu), and then select
the Voice Over IP tab.

Figure 8: Verifying SIP User Registration in the Web Interface

The line's SIP Proxy user name and password is incorrect. To check this, perform the
following:
a) Logon to the Web interface.
b) Access the 'Voice Over IP' screen (Voice Over IP menu), and then select the Line
Settings tab.
c) Edit the required line.

Figure 9: Verifying SIP Proxy User Name and Password in the Web Interface

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