Custom Service: PBX-ALU-MS-167EXP-012-001. PBX-ALU-MS-167EXP-012-001 provides twelve (12) months of maintenance and software support for the PBX-ALU-EXP-167-001 expansion package after Year One (1). Increase quantity by one (1) for each additional year. Additional fees apply should maintenance and support not be renewed on a continuous basis (i.e. catch-up or gap fee). Designed for the Amtrak East River Tunnel (New York, NY) Project. - PBX-ALU-MS-167EXP-012-001