First, are you´reyou talking about VoIP phones?? Everyone on the network must be able to access the VoIP Infrastructure, e.g.infraestructure, eg: will everyone use thede VoIP system??
One thing that you can do is separate the DATA and VoIP into two different networks, all represented on all the switches. One thing that you need to keep intake on mind is the number of users that you have.
If weEg: We suppose you have a 24 port switch per closet, i guess, you have aproximatelyaprox. 20 ports per switch available to connect something, and 10 per user (I assumei suppose you will get 2 ports per user, one for dataDATA, and another forpor VoIP phone).
Doing itOn that way, you will need to configure the switch ports toward the end-users aslike access ports (untagged links). PCs on, the data VLANswitchports connected to end-user, computer and phones, everyone on the VoIP VLAN. Rememberhis vlan, remember, 2 VLANS, and create trunks Trunks(tagged links) to transport the VLANsvlans, and permitted on it.
WithOn that configuration, Iconf. i guess your, yor project will work.