User guide

HELP AND TROUBLESHOOTING 193
inbound calls that are forwarded to remote extensions. The call will be
forwarded out on a line belonging to the same unit that the call came in
on. The call will only be forwarded on the other TalkSwitch unit if no
incoming telephone line on that first unit is available.
Calls across the LAN are lower in volume.
• Check the line gain levels under Options -> Audio Controls in the
configuration software. You may need to increase the line gain levels on
one or more lines to compensate for high loss lines. If these controls are
set incorrectly and your lines are problematic, you may hear an echo
when calls are made across the LAN.
Problems that may occur with VoIP
I hear a re-order tone when I try to dial a VoIP location.
• Confirm the number dialed is actually part of the VoIP group (i.e.
registered with the same proxy/registrar server as your TalkSwitch, IP
gateway or IP phone is registered with.
• Check that TalkSwitch has all proper settings in the IP configuration and
VoIP configuration pages.
• Verify that the number you are dialing is registered with your TS proxy
registrar. Go to System Information -> VoIP Configuration and click
the View Registrar Entries button.
• Contact our customer support department by e-mail:
www.talkswitch.com/[e-mail].
Callers complain the sound is distorted or choppy.
• Your broadband connection may not have enough upstream bandwidth to
support many simultaneous VoIP calls. Under Options -> Audio
Controls, you may need to disable the G.711 and G.726 codecs and only
use G.729.
• You may have too much data traffic on your Internet connection at the
same time you are trying to make voice calls. We suggest that you use a
router that supports QoS (Quality of Service) for VoIP.
When I call someone or they call me, voice is only heard in
one direction.
• The cause of this problem is usually a result of a router being
misconfigured with respect to port mappings. Ensure all required VoIP
ports are mapped to your TalkSwitch unit. Also, ensure you use a static
private IP address when connected to your router as this can also affect
port mappings from the firewall/router.
• Use a router that supports the UPnP.