100 CHAPTER 7: GETTING MORE FROM Y OUR T ELEPHONE SYSTEMYou can cancel an MWI message only from the same extension fromwhich you sent the MWI message.To cancel an MWI message:1 Pick up the handset and press Feature + 413. Or press the MWI Cancelaccess button. The display panel on your 3Com Telephone shows CancelMWI To:.2 Dial the extension to which you sent the MWI message that you want tocancel and press #.3 The display panel on your 3Com Telephone shows Cancel Sent.Dialing a Call to aRemote OfficeYou can dial calls between sites in your organization that are separatedgeographically but that are linked by a Wide Area Network (WAN)connection. Each site must have an NBX system. Typical configurationsare described in the next sections.Using UniqueExtensionsIn the sample network shown in Figure 7, everyone in the entireorganization has a unique telephone extension. Whenever you make acall to an extension that is not located at your own site, your NBX systemsets up a connection to the NBX system at the other extension’s site.In this example, to call a user in Dallas, a user in Chicago dials a Dallasextension (3000 through 3999). The dial plan on the Chicago NBX systemsets up the necessary connection to the Dallas NBX system and then tothe extension at that site.
