Yealink's multicell system comprises a W80DM DECT Manager (sold separately) and two or more W80B base stations (up to a maximum of 30 base stations). It is ideal for cordless deployments of more than 8 handsets (the maximum on Yealink's single cell W60B base station), and allows seamless roaming between base stations.
The hardware for the W80DM & W80B is the same; you can change the operation mode of an individual device by flashing the required firmware.
The W80 multicell system is compatible with several handsets, including the W53H, W56H and W59R cordless handsets, the CP930W conference phone, and desk phones compatible with the DD10K USB dongle (T41S/T42S).