Gigaset N670 IP PRO Installation, Configuration And Operation page 35

Use SIP Security (SIPS)
Only if TLS is selected. SIPS enhances SIP with TLS/SSL encryption. Using SIPS makes it more diffi-
cult to listen in on the connection. Data is transmitted encrypted over the internet.
Mark/unmark the check box to enable/disable the use of SIPS.
SRTP options
SRTP (Secure Realtime Protocol) is a security profile to ensure confidentiality, integrity, replay
protection and message authentication for audio-visual data transmission over IP-based
networks.
Select which calls should be accepted:
Secure Real Time Protocol
Accept non-SRTP calls
Deregister detached HS
The SIP account of handsets that are not reachable can be de-registered automatically.
Click on Yes/No to enable/disable automatic de-registration.
Redundancy settings
Redundancy - DNS query
VoIP providers provide SIP server redundancy for load balancing and service reliability. SIP
servers can be identified by DNS using different queries:
A Records just the specified IP addresses and the related port numbers.
SRV + A Finds an available server port for the specified proxy and registration server.
DNS SRV allows a client to only have to know what type of service it is looking
for instead of the actual server.
NAPTR (NAPTR NAPTR records are used in conjunction with SRV records to discover what types
+ SRV + A) of services are available for a name.
Failover server
If Redundancy - DNS query = A
In case your provider supports a failover server you can enter the data here.
Enable/disable the use of a failover server via the radio boxes next to Enable registration.
Registration server
Enter the IP address or the (fully qualified) DNS name of the failover registration server.
SIP server port
Enter the communication port used on the failover registrar.
Range: 1-65535; Default: 5060 (for UDP/TCP), 5061 (for TLS)
Security is activated for voice connections.
Insecure calls are accepted even when SRTP is activated.
Provider and PBX profiles
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