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.
Configuring VLANs. The controlleroperates as a layer-2 switch that uses a VLAN as a broadcast domain. As a layer-2 switch, the controllerrequires an external router to route traffic between VLANs. The controllercan also operate as a layer-3 switch that can route traffic between VLANs defined on the controller.