SPA501G, SPA502G, SPA504G, SPA508G, SPA509G. Cisco Linksys CIT200, CIT300, CIT310, CIT400, SPA303. Hello, sale on one plantronics m120 corded headset with 2.5mm jack. this can be used with Cisco and other Panasonic phones if you use an RJ9 connector ( NOT included ) unless your phone got a 2.5mm port.
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