we have recently implemented a voip solution: Siemens WL2 handsets, Trapeze MX200 controller, Trapeze MP422A antenna's, 3Com 5500 ei PoE switches and a Siemens HiPath 3800 hybrid pbx. Our supplier checked the configuration of all devices (handsets, LAN, pbx etc) and tells us all is well configured for voip (Vlan, QoS etc) but when a user roams between antenna's, we get a short interruption during the handover: 0,5 to 1 s. Our supplier tells us this is default behaviour. Is that correct? I thought voip was mature enough to provide seamless (<50ms) handover?
Any thoughts on this would be welcome...
PS we use our wireless LAN for voice only at this point