Nortel IPT over Cisco Infrastructure

Can anyone give me some ideas on integrating a nortel succession and nortel phones with Cisco Switches.
Any sample QOS scripts would be appreciated.

Jon
Thanks for the answer. Seems that i had the right idea. My concern was that the end devices in the other VLANs get the IP adresses of the DSL Router (with activated DHCP) if i choose the wrong configuration.
One more question:
Do i have to configure both switchports - the one connected to the DSL router and the one connected to the end device - as trunk ports and configure the 'DSL - VLAN' (VLAN 112) as Trunking VLAN?
Like this:
Name: Gi1/0/47
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 200 (client neu)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: 17 (VOIP-OG1)
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: 112
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Matthias

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