Add hands-free mobility to your SIP communications with the VSP600-B base station. Thanks to DECT 6.0 technology, you can add up to six cordless devices per base station, using any combination of our VSP601 SIP cordless handsets or VSP608 SIP cordless desksets each with its own extension or unique phone number. The base station can be configured for up to six lines and supports up to four active, concurrent calls.