1. A method comprising: identifying a bridged-line group, the bridged-line group including a first user associated with a first mobile device and a second user associated with a second mobile device; generating a rule for designating the first user as a monitoring user for the bridged-line group, wherein the rule specifies that the first user is designated as the monitoring user when the first mobile device is in a pre-determined location; receiving a call intended for the second user; determining that the first user is designated as the monitoring user for the bridged-line group based on the rule and on determining that the first mobile device is located in the pre-determined location; routing the call intended for the second user to the first user at the first mobile device based at least on the determining; and enabling the first user to handle the routed call on the first mobile device.