
System interfaces
33
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
Tab. 4
SIP provider configuration: Proxy
Tab. 5
SIP provider configuration: NAT
Tab. 6
SIP provider configuration: SIP access
Tab. 7
SIP account configuration
Parameter
Parameter value
Remarks
IP address
<Address>
IP address of the proxy server at the SIP provider All the commu-
nication server’s external SIP messages are sent to this address
(
Primary proxy
). If it is not available, the messages are sent to the
alternative IP address (
Secondary proxy
)
Port
<1…65535>
UDP port of the SIP proxy server
Name
<Name>
Domain name of the SIP proxy server, e. g. URL
Parameter
Parameter value
Remarks
Activate ‘Keep alive’
<
Yes / No
>
If the parameter is on
Yes
the system periodically updates the NAT
table on its own firewall using "Notify" messages to the proxy
server. This means that the system remains reachable for incom-
ing SIP calls.
ALG support
<
Yes / No
>
Supports the connection to SIP providers (depends on the pro-
vider). If the parameter is configured as
Yes
, IP packets that con-
tain SIP signalling information are opened by the ALG (Applica-
tion Layer Gateway) and the private IP address is replaced by the
public IP address. (The public IP address in the system must be
configured.)
Parameter
Parameter value
Remarks
Trunk groups
<Name>
Here the SIP provider is assigned to a new trunk group.
Maximum incoming
calls
<30…240>
No further calls are routed via this trunk group once the set limit
is reached. This is signalled to the caller by means of the conges-
tion tone.
SIP access without
accounts
<
Yes / No
>
This parameter has to be set to
Yes
to enable the SIP networking
of systems. The parameter can only be configured if no accounts
are assigned to the SIP provider.
Parameter
Parameter value
Remarks
Name
<Name>
Name of the SIP account
Display Name (name
to be displayed)
<String>
Some providers require this entry. A name or a number such
as the SIP ID is entered here.
SIP ID
<Number>
Identifier of this account with the SIP provider. This is the
access number of the account which is then linked with a
direct dialling number in the communication server.
This parameter must be specified at all times.
User name
<Name>
User name of the SIP account with the SIP provider.
This parameter is to be specified only if the SIP provider
requires authentication.