sentences:  Completion was delayed but the TXE1 went into service in 1968 in Leighton Buzzard.Although designed to handle 10,000 subscribers, it started out with a capacity of 3000, with 152 incoming junctions and 166 outgoing junctions.Later, instead of expansion of the TXE1, capacity was increased with three TXE2 exchanges and a TXE6.