Once activated, the Shared Lines Function lets all phones in the group ring simultaneously once a call comes in. Because anyone from the group can answer the call and if it is not for you, you can simply put the caller on hold and let the person needed to pick it up on the same line from a nearby phone in the Shared lines group.
All incoming calls route automatically to the proper device(s) or your assigned phone number. If the call comes in and is a fax call, you can automatically route it to the fax machine or fax modem of your Shared Lines Group. As for voice calls, you can route them to desk phone(s) or an answering machine. All outgoing calls access the line from any device.