The KEYMILE COZBU 110 306/1 (hardware revision R1B) is a power supply unit identified by the functional designation POSUM, used within the Keymile UMUX 1500/1200 multi-service access and transport platform. According to Keymile's official Release Note documentation, POSUM (POSUM 206 unit) is listed among the platform's exclusive power units for the UMUX 1200 subrack, alongside the POSUA (AC/DC power supply, limited variant) and the now-obsolete POSUS 106 unit. POSUM provides DC/AC power conversion and distribution to the UMUX subrack, supplying the traffic and control units installed within it. UMUX is a carrier-grade multiplexer platform used by dedicated network operators such as utilities, railways, and airports. Keymile was acquired by ABB in 2017 and the UMUX range was later discontinued; this card is now sourced mainly as a refurbished or pulled spare part.
Key Features:
- One-slot plug-in power supply unit for UMUX 1500/1200 subracks
- Functional designation POSUM — power unit for the UMUX 1200 subrack
- Supplies DC/AC power conversion and distribution to traffic and control units
- Compatible with Keymile's standard UMUX rack architecture
Technical Specifications:
- Manufacturer Part Number: COZBU 110 306/1
- Hardware Revision: R1B
- Functional Unit Type: POSUM (POSUM 206 unit)
- Manufacturer: KEYMILE AG, Bern-Liebefeld, Switzerland
- Platform Compatibility: UMUX 1500, UMUX 1200
- Form Factor: Single mechanical slot, standard UMUX 1500/1200 plug-in unit
- Function Category: Power supply unit
- Note: Exact input/output voltage ranges and current ratings for POSUM were not found in a standalone public datasheet — its role as a subrack power unit is confirmed via Keymile's official Release Note, but precise electrical specs should be verified with Keymile/DZS legacy documentation before publishing.
