Mitel 5560 IPT none Specifications download pdf (Page 316)

Engineering Guidelines

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It is important that QoS be set up in the network end to end, not just in a few places. Internet

VPN connections (for example, IP Sec) are not under the control of the customer so QoS is

not end to end. VoIP is not controllable and quality is variable.

Define the IP Addressing

The first step in planning a VoIP network is deciding upon the VoIP addressing scheme. Usually

a data network IP addressing scheme will already exist, so that will already be decided.

Choose an IP address range for the VoIP system that is not used elsewhere. Choose from one

of the private address spaces (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16), such as

192.168.100.0/24.

If possible, do not use IP addressing that conflicts with the internal IP addresses of the 3300

ICP, 192.168.10.0/28 to 192.168.13.0/28. (For Rel. 7.0 and later, 169.254.10.0/28 to

169.254.30.0/28 are reserved.)

Devices that conflict with the internal addresses will NOT be able to communicate with the ICP

in any manner. Different networks must have different IP address ranges. There can’t be two

networks using the same IP addresses or the router can’t route traffic correctly. Each interface

(real or virtual) on a router is on a different network.

Define the VLAN

Most of the time, data will already exist and by default will be on VLAN 1. The next step in

planning a VoIP network is deciding on the voice VLAN, VLAN 100, for example.

To create a VLAN:

Switch# configure terminal

Switch(config)# vlan 100

Siwtch(config-vlan)# name VoiceVLAN

Switch(config-vlan)# end

The IP address ranges that were previously selected will be used on the voice VLANs.

Note: MiVoice IP Phones set the 802.1q bits as they are using VLAN tagged traffic.

However the ICP controller does not send VLAN tagged traffic and so cannot set Ethernet

priority. The switch port the controller connects to should set the Ethernet priority. This

also applies to other non-VLAN aware VoIP devices, such as NuPoint Unified Messenger

Rel. 8.5.

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Mitel 5560 IPT none Specifications Page 316