174 System configuration
subnets according to this mask, the DAP or DAPs are supposed to
be in a branch office. If the IP addresses are in the same aggregated
subnet according to this mask, the system assumes that the IP
addresses are in the same subnet.
The term aggregated means that the subnet consists of smaller
subnets connected over a router, but according to the subnet mask, all
behave as one subnet. This is applicable for the Routed Head Quarter
network solution without branch offices.
Routed Head Quarter configuration implies that different subnets are
connected through one or more routers. The subnets in the network
are part of one company network.
For setting up Routed Head Quarter configuration, the network
components, such as the switches and the routers, must be correctly
configured for VoIP and IP multicast. Also, the network must support
IP multicast between all network components that are used for SIP
DECT System.
Routed Head Configuration is the same as Simple configuration, but
includes one more step. See Procedure 49 “Configuring Network
Settings” (page 140).
Choice of system configuration
Procedure 83
Choosing system configuration
Step Action
1 Open the DAP Configurator and click Modify.
2 Select the SIP DECT system that you are running. Click System
Configuration.
3 Choose Routed Head Quarter Configuration for System
configuration.
4 Enter a Time To Live Value higher than 1 to let the Router
forward multicast packages.
5 Calculate and enter the Aggregated Subnet mask.
The Aggregated subnet mask is the subnet mask for the DAPs
to determine the network boundaries for a SIP DECT System.
The Aggregated subnet mask covers the network segments
connected together using routers that support IP multicast.
Example: DAPs in three subnets:
• 192.168.1.0/24
• 192.168.4.0/24
• 192.168.5.0/24
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 01.07
6 January 2009
Copyright © 2008-2009 Nortel Networks
.
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