
Chapter 5 Dial Plan Architecture and Configuration
Cisco CallManager Dial Plan Architecture
5-8
Cisco IP Telephony Network Design Guide
78-11103-03
Devices
All IP endpoints are viewed as devices, but only certain devices can be entered in
a route group. Figure 5-3 illustrates the types of devices that can be in route
groups.
Figure 5-3 Device Types to Which Route Groups Point
The following notes apply to the devices in Figure 5-3:
• An H.323 gateway can be configured to be gatekeeper controlled. This means
that, before a call is placed to an H.323 device, it must query the gatekeeper
successfully. Only H.323 devices that are remote Cisco CallManagers should
be configured as gatekeeper controlled.
• To select the codec used by calls to the device, place the device in a region
that uses the desired type of codec.
• H.323 gateways can be shared by multiple clusters for inbound and outbound
calls, whereas gateways based on MGCP or Skinny Gateway Protocol are
dedicated to a single Cisco CallManager cluster.
V V
Route
group
Skinny based MGCP based H.323 based H.323 based
Cisco Access Digital Trunk Gateway DT-24+
Catalyst 6000 gateways
Cisco Access Analog Trunk Gateway
Cisco Access Analog Station Gateway
VG200
Configured as:
Device protocol=H.225
Configured as:
Device protocol=Intercluster trunk
All Cisco IOS
gateways
Remote
Cisco CallManger
40796
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