Question : Confused about a network with Data and VoIP

I have a T1 line with a T1 router and VoIP router.  Is the following network layout possible with the equipment shown?  

So:
               |-----------Our firewall router------|                                   |
T1 Router |                                                |  Procurve 2824 Switch |--------Phone ------Computer
               |-----------Our VoIP router----------|                                  |


If so, right now the VoIP router is on a 192.168.1.0/24 subnet.  

Should I set the default VLAN IP address as 192.168.0.0/24 and create a VLAN #2 (for voice) with the network of 192.168.1.0/24?

Also the VoIP router has its own DHCP server, and for the computer, its on a Windows SBS 2003 domain.

Thank you!

 

Answer : Confused about a network with Data and VoIP

As long as the phones can apply VLAN tags you will be OK.  One of your ISP assigned LAN side addresses will go on your VoIP router.  One or more will go on your Firewall router to handle NAT/PAT for your data Internet connectivity.

The main issue is that the switch only supports one untagged VLAN per port.  The untagged VLAN will have to be the VLAN your PC's and Internet router are on.  If the phones can tag, they can be tagged on the switch ports with an untagged port in that VLAN leading to the VoIP router.  So, lets say Data is VLAN 1 and Voice is VLAN2.  Port 1 is going to Firewall and Port 2 to VoIP router.  Port 1 will be untagged in VLAN 1.  Port 2 will be untagged in VLAN 2.  

All other ports will be Untagged VLAN 1 and tagged in VLAN 2.  So on any of the other ports you can put a phone, PC, or phone and PC.  Voice traffic will be placed in VLAN 2 based on the VLAN tags.  All other traffic will be put in VLAN 1.

The Firewall and VoIP router will both plug into an Ethernet port on the T1 Router.  

If you will be using any TAPI applications or need to get from phone to PC for some reason you will have to put static routes for the 192.68.0.X net and the 192.168.1.X network in the T1 router.  Most likely though with a hosted solution you will not be needing this.