Methods, devices, and computer programs for improving the efficiency of multi-user multimedia messaging services are disclosed. The method comprises storing, in a network information database, an entity representing the bearer circuit, and associating capacity information with the bearer circuit entity specifying a first bandwidth quantity defining a quantity of bandwidth made available by the bearer circuit. The ISP network includes numerous transit routers and edge routers. The multimedia content may further include customizable templates in which business messages may be generated. The heating element and housing are sized and configured for insertion through the drain plug opening from the outside of the tank.