SIP Telephony
Voice over IP (VoIP)
165
of the Internet gateway product used. The product should be compatible
with SIP telephony. These products provide a “Full Cone NAT” setting for
this application.
●
To enable the use of multiple devices on a single Internet connection, the
IP addresses used in a LAN (often 192.168.x.x) are translated to a valid IP
address using address translation (NAT - Network Address Translation),
but no status information is available for NAT on an incoming RTP
connection. To avoid this problem, the IP address of a workstation
computer or telephone visible on the Internet is determined using a STUN
server (STUN: Simple Traversal of UDP over NAT). You can ask your SIP
provider for the STUN server’s IP address and port number. If you don’t
need a STUN server, leave the
SIP Provider
field empty.
●
For direct SIP telephony using Forum 5004/5008/5012, only SIP IDs
consisting of numbers for identifying subscribers registered with the SIP
provider specified can be addressed
●
You can integrate an external SIP connection in the
Telephony
:
Trunks
:
Route
menu into the route configuration. You can use a network provider
rule to specify the routing of numbers within a specific range to use SIP
telephony as a preference (see also
You can configure SIP connections in the
Configurator
on the pages
Telephony
:
Trunks
:
SIP provider
and
Telephony
:
Trunks
:
SIP trunks
. Enter
the technical attributes of a specific SIP provider, such as the IP addresses for
the registrar and the STUN server under
SIP provider
. Under
SIP trunks
enter the information for an existing SIP account, such as the user name,
password, assigned call number and the maximum number of simultaneous
calls possible.
For extension-capable SIP-DDI lines, you can, as needed, make additional
settings on the
Telephony
:
Trunks
:
SIP Provider
page. Assigning extension
call numbers and internal subscribers is configured on the pages under
Telephony
:
Call distribution
(
Incoming DDI
or
Outgoing DDI
). Please note
the explanations on these pages in the online help. Furthermore, assigning
extensions using placeholders (“wildcards”) is possible. The online help offers
an explanation under the keyword
Call Number Mapping
.