Current fixed cam (left view) is a Supercircuits PC185 IR (infrared), but I think this model is discontinued. Closest replacement might be PC177RHR-4 (Not in SC online catalog – call them). Keep in mind that at short distance you don’t need a lot of IR range. The connection is hardwired using VT-1 transceivers (Not in SC online catalog – call them) on RG-6 coax cable. Pan/Tilt/Zoom cam (right view) is a PC407PTZ. It also uses a VT-1 connection on RG-6 which is paired with Cat 5E to provide two leads for RS485 control of P/T/Z. I am currently using PTZ Controller software.
Cameras stream one A/V signal each via a PC using PCI analog to digital cards or USB analog to digital connections via Microsoft Windows Media Encoder software (free). Any PC with a decent processor will do. Video streams go to a server that can support hundreds of simultaneous users.