AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 346)

Working with Servers in the Domain
330 MaxCS 7.5 Administration Manual
5. Input the address and member key, and click OK.
Setting an Alternate Server for AltiGen IP Phones
In a VoIP domain, you can set an alternate server to which global AltiGen IP phones will be registered when
their own server (primary server) experiences a problem that interrupts phone service. The IP phones will reg-
ister to the alternate server. This applies to a workgroup, as well. Switchover must be enabled for the individual
IP phones/groups in Enterprise Manager (User button > Resolve tab). But before you can do this, you must
set an alternate server.
Notes:
• Because of its role in the domain, the domain master cannot use this feature.
• This feature does not apply to extensions using IPTalk.
• Make sure the alternate server has enough licenses, such as agent licenses, station licenses, and so on.
To set an alternate server,
1.
Click the Servers button, and then the Information tab.
2. In the AltiGen IP Phone Redirect panel at the bottom of the tab, check Enable Switchover to Alternate
Server.
3. Select an alternate server from the list.
4. Click Apply.
(After you click Apply, the current active server name will appear in the Current Active Server box. This
name is not editable.)
With the alternate server assigned, you can now configure individual extensions/groups for redirection. See
“Redirecting AltiGen IP Phones When a Server Is Down” on page 338.
Note: If the alternate server assignment is removed from the configuration above, the redirection
configuration is removed from all extensions and workgroups to which you assigned this feature (User
button > Resolve tab).
Note: If Native VM Integration with Microsoft Exchange is also configured, then both the primary and alter-
nate servers need to have the same dial plan configured in the Microsoft Exchange server, so that
users who have extensions flagged for redirection can access their voice messages from both the pri-
mary and alternate servers.
If the Primary or Alternate Server Is Behind NAT
When you configure the redirection feature for AltiGen IP phones, the primary server sends the IP address of
the primary and alternate servers to the IP phone. The IP phone may run on the public or local network, and
the primary server or alternate server may run behind NAT. So to support a server behind NAT, the primary
server sends the NAT IP address or local private address according to the IP phone's IP address. If the IP
phone's IP address is in a local network for the server, the primary server sends the private address, otherwise
it sends the NAT address.
To configure for NAT,
1.
In Enterprise Manager, click the Servers button > IP Networks tab.
2. In the NAT Support panel, check Enable SIP NAT Support.