ZXMP S325 OL1x4 Optical Line STM-1 Based on comprehensive analysis of full-service and large-capacity requirements at network access layer, as well as consideration on vast MSTP equipments existing in current operators’ networks, ZTE launches ZXMP S325, a highly-integrated, large-capacity and compatible full-service access platform, to adapt to the network in smooth evolution. ZXMP S325 offers rich service interfaces, including STM-16, STM-4, STM-1 optical interfaces, STM-1, E3/T3, E1/T1 electrical interfaces, 10M/100M Ethernet interfaces, GE optical interface, as well as robust full-service support for ATM, EOS, RPR. With perfect smooth upgradeability, it supports smooth upgrade of access layer capacity from STM-1/STM-4 to STM-16, strongly ensuring voice, data and video services to scale for capacity.