Transceiver Contains SONET/E4 Line Interface
Operating at 139.264 Mb/s for E4 or 155.52 Mb/s for OC-3, STS-3 or STM-1 rates, the 78P2253 SONET/SDH/E4 transceiver can interface to 75 ohm coaxial cable using CMI coding or a fiber-optic module via a serial PECL interface. Interfacing to a digital