2 4
2.
Verify that the TEL1 LED panel light is on and that your computer can “see”
the Internet. If your PC cannot contact the Internet, double check all the
applicable topics in the Troubleshooting sections
3.
Have you changed the dialing rules (digit map) on the “Phone Configuration”
page of the MTA’s web interface? It’s possible that you may have put in a
dialing string unsuitable for your location. Try dialing the number followed by
a # character. This tells the MTA not to wait to see if any other digits are to be
dialed, but instead, just dial the call.
4.
If dialing internationally, verify that your service provider allows your account
to make international calls.
5.
Have you placed the MTA behind a firewall that blocks the SIP protocol?
Unblocking these ports but leaving the MTA behind the firewall is still not a
proper solution, as it may disable the Quality of Service requests that the MTA
makes to provide for the highest quality connection. If you are an expert, and
can configure your firewall yourself, the ports to unblock are 5060 and 5090.
6.
If the situation continues, contact your service provider.
T11: I Can Place Calls, Hear Ringing, but Cannot Talk or Hear, or Cannot Receive Calls
1.
Have you placed the MTA behind a firewall that blocks the SIP protocol? If
you are an expert, and can configure your firewall yourself, the ports to unblock
are 5060 and 5090. Unblocking these ports but leaving the MTA behind the
firewall is still not a proper solution, as it may disable the Quality of Service
requests that the MTA makes to provide for the highest quality connection
2.
Is the ringer on the telephone set to off position? If you call your own number,
does the TEL1 light blink? If so, the phone should be ringing, and perhaps the
ringer does not work. Please try another phone.
3.
Have you set up call forwarding and forgotten? This is actually a very common
mistake.
4.
Please double check that the telephone ringer works by attaching it to another
line if available.
T12: How Can I Improve My Line Quality
1.
Have you placed the MTA behind a firewall in a situation where other
devices on the network are very active? If so, can you put it “in front”
of the firewall? The firewall may disable the Quality of Service requests
that the MTA makes to provide for the highest quality connection.
Remember that sometimes you may not realize that, for example, peer-
to-peer networking applications may be using bandwidth without your
realizing it; placing the MTA “in front” allows the MTA to request a
higher priority for the voice communications over the Internet.