Appendix – Examples Control Station Duetto
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Example 5: Multiple SIP server registration
If more than one SIP server is configured, the DUETTO device enables you to choose between 3 differ-
ent fallback modes. The following options are available: “Parallel mode”, “Cisco mode” and “Sequen-
tial mode”.
To ensure ideal fallback behaviour, it is recommended to apply a mirrored server configuration: All de-
vices of the network have configured the same main server, fallback server 1 and fallback server 2.
Every single device always registers with the same unique user ID.
• Parallel mode
The device registers all configured servers simultaneously. By default and only when the outgoing call
is configured using only a simple user ID, the device always uses the server with the highest priority to
establish outgoing calls. If the entire SIP-URI is configured (
“user ID@server IP”, e.g. “100@10.10.1.2”),
outgoing calls also can be established using other servers.
Incoming calls can be received from all
reachable and registered servers. It is also possible to use all three servers simultaneously (not recom
-
mended).
Server states in parallel mode
In the web interface of the DUETTO device, several server states are shown on page SIP, tab: SIP serv-
ers:
Registered*: Registration on the SIP server has been successful. The SIP server is ready for use.
It is being used for outgoing calls (if calls are configured only with the user ID).
Registered: Registration on the SIP server has been successful. The SIP server is ready for use.
Registration failed: Registration has been failed. The SIP server is not ready for use. The device
is trying to register again later.
Only in the web interface:
Deactivated: Registration on this server has been deactivated by the user.
• Cisco mode
During operation, the DUETTO device continuously checks if all configured servers are ready for use.
It automatically registers the currently available SIP server with the highest priority. Incoming and out
-
going calls are only possible via the current operational server. If the server with the highest priority
malfunctions, the device will register on the server with following priority. As soon as a server with the
next highest priority is operational again, the device will unregister from the lower prioritised server
and will register again on the higher prioritised server.
Server states in Cisco mode
In the web interface of the DUETTO device, several server states are shown on page SIP, tab: SIP serv-
ers:
Registered: Registration on the SIP server has been successful. The SIP server is ready for use. It
is being used for outgoing calls.
Reachable: Verification of operational readiness has been successful. The server is potentially
ready for use. The device is not registered on this server. Te server is currently not being used for
calls.
GOOD TO KNOW: Bypass server prioritisation
With DUETTO it is possible to actively use specific servers to bypass the default fallback scenario. For
this to work, enter the SIP user ID including the domain (e.g. “
1200@10.10.1.2” or “1200@10.10.1.3”)
in
the field User-ID
. In this scenario, the user ID has to be the same for all servers (mirrored server config-
uration).
NOTE: Display of servers
Deactivated servers by the user, are not shown in the function menu device information of the web
interface.
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