The KEYMILE ROFBU 367 161/1 (hardware revision R1D, manufacture date code 2004W34, functional unit type LESA8) is a plug-in leased-line interface card for the Keymile UMUX 1500/1200 multi-service access and transport platform. The UMUX platform, originally launched by Ascom and continued by Keymile, is a carrier-grade multiplexer used in dedicated networks such as railways, utilities, airports, and pipeline operators to deliver TDM, ATM, and IP-based services over a single compact network element. The LESA8 unit is one of the leased-line/data interface modules positioned in the UMUX 1200 architecture alongside SHDSL units (STIC1/STIC2) and its digital counterpart LESI8. Keymile was acquired by ABB in 2017, after which the UMUX range was discontinued and later passed to DZS in 2019 — these cards are now sourced almost exclusively as refurbished or pulled spares to support legacy UMUX deployments.
Key Features:
- One-slot plug-in unit compatible with UMUX 1500 and UMUX 1200 subracks
- Leased-line interface function (LESA8), paired functionally with the LESI8 digital variant
- Managed via Keymile's UCST/UNEM configuration and network management tools
- Supports legacy dedicated-network operators (utilities, railways, airports, pipelines)
Technical Specifications:
- Manufacturer Part Number: ROFBU 367 161/1
- Hardware Revision: R1D
- Date Code: 2004W34 (week 34, 2004)
- Functional Unit Type: LESA8 (leased-line interface)
- Manufacturer: KEYMILE AG, Bern-Liebefeld, Switzerland
- Platform Compatibility: UMUX 1500, UMUX 1200
- Form Factor: Single mechanical slot, standard UMUX 1500/1200 plug-in unit
- Bus Interconnection: P-BUS (typical for UMUX leased-line/data interface units)
- Note: Precise port count and electrical interface specification (analog vs. digital signaling, connector type) for LESA8 were not found in a publicly available standalone datasheet — only its position and function category are confirmed via Keymile's official UMUX Release Note documentation. Recommend flagging as "specs on request" or contacting Keymile/DZS legacy support if exact port/signal specs are required before publishing.
