Our recent work on the regioselective synthesis of a number of heterocycles (4) prompted us to search for a simple and effi- cient reagent for this heterocyclization. We have recently achieved a facile entry to this ring system 6 (5) with the use of a well-known brominating agent, pyridine hydrobromide per- bromide, which we report here.
Voice VLAN. 1  Voice VLAN allows you to enhance VoIP service by configuring ports to carry IP voice traffic from IP phones on a specific VLAN. VoIP traffic has a preconfigured OUI prefix in the source MAC address. 2  You can configure VLANs on which voice IP traffic is forwarded.
5. PVID (Port VLAN ID) is a default VLAN id assigned to frames coming to the port. and i thought about Private Vlan ID; native VLAN do NOT carry any VLAN tags; if an untagged frame is received on a trunk port, the frame is associated with the native VLAN configured on that port.VID (Port VLAN ID) is a default VLAN id assigned to frames coming to the port.