EVERY CALL COUNTS 21
7. If your service provider requires you to set up keep alive messages, and if your
router does not support uPNP, set up keep alive messages.
Keep alive messages maintain the connection from the TalkSwitch unit,
through your router, to the service provider’s SIP server.
a) Select the Enable NAT keep alives check box.
b) Click Settings. The Keep Alive Settings window appears.
c) Select the type of ping, as directed by your service provider. Choices are:
•Simple ping — A standard ping message that works with all
SIP servers.
•Nortel ping — A longer but more reliable ping message that only
works with specific Nortel SIP servers (e.g. Nortel MCS 5200).
d) If necessary, change the ping frequency, as directed by your service
provider. The default setting is 45 seconds.
8. Enter the IP addresses or FQDNs, as provided by the service provider, into the
following boxes. If the service provider does not specify a value, leave the
box blank.
•Proxy server name
•Registrar server name
•Outbound proxy
• Realm/domain
SETTING CODEC OPTIONS
If you are using a TalkSwitch-certified VoIP service provider, visit
www.talkswitch.com/support/ServiceConfigurationGuides.asp to access the
service configuration guide for your VoIP service provider. The service
configuration guide lists the supported codecs.
A codec is a method of compressing and decompressing audio signals for
communication across a network. TalkSwitch supports the G.729, G.726 and G.711
(µ-law or A-law) codecs for VoIP calls. If your service provider or equipment
requires specific codecs for VoIP or Fax over IP calls, you can restrict TalkSwitch to
use the required codec.