U1981+IAD at location A of a customer are networked
with voice devices at location B through VoIP. When extensions at the two
locations call each other, the calling number is not presented for a called
analog phone at location A.
Log in to the web management system of the U1900 series unified gateway as an
On the User Management > SIP User or User Management > POTS User page, select the number to which service
rights need to be added, and click Business configuration
In the Simple business area, check whether the calling line
identification presentation (CLIP) function is enabled.
If the function is not enabled, enable it and check whether the problem is
solved. If the problem persists, proceed to step 5.
Use the IPT_LMT tool to collect call logs on the voice gateway.
On the IPT_LMT, check whether Calling number is presented in the call
logs. If it is not presented, contact the administrator of the peer device to
solve the problem.
If Calling number is presented in the call logs on the IPT_LMT, choose Advanced
Configuration > User Port Properties > Voice Gain（dB） on the IAD and adjust the gain. In this case, adjust the values from "0
for transmitting and -3.5 for receiving" to "0 for transmitting and 0
for receiving". After the adjustment, the calling number is presented for
a called analog phone.
calling number is not presented, check the following three possible causes one
1. The CLIP function is disabled.
2. The voice gateway does not receive the number of
the calling party.
3. The Voice Gain（dB） values do not apply to the current line.