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.
Port-Based Virtual LANs (Static VLANs) â  To designate a different VLAN as the primary VLAN, select the Primary. VLAN field and use the space bar to select from the existing options. â  To enable or disable dynamic VLANs, select the GVRP Enabled field and. use the Space bar to toggle between options.