AT&T Co has agreed with PCO Inc, the Corning Glass company in which IBM took a 25% stake at the beginning of the year, that the two companies will market virtually identical fibre optic components to emerging industry standards. AT&T and PCO intend to offer interchangeable fibre optic components compliant with the FDDI Fibre Distributed Data Interface standards, and both will produce components with common product descriptions, identical component pinouts, and similar footprints and power supply requirements. The products included in the agreement are a fully compliant FDDI 125Mbit-per-second transmitter-receiver assembly with 32 pins arranged in four rows; a 125Mbps 16 pin ST (a) connectorised optical data link to meet FDDI requirements optically; and a 200Mbps 16 pin, ST – connectorised optical data link.