A belt skew correcting device corrects a deviation of an endless belt which is supported by a plurality of rollers and which is driven to rotate around the plurality of rollers. The ATM transmitter being able to handle a plurality of ATM channels, at least one of the channel being an ATM AAL2 channel. Another set of detents on the guard and the lug of the syringe retain the guard in the extended position. When the system determines that the standard caller identification information cannot be provided, the system transmits a request for audible caller identification information to the calling party.