Specifications:

Three-way call for an elevator (complete set of configurations)

One elevator five-party call (complete set of configuration)

An elevator three-way call suit (mobile receiver suit)

One elevator five-party call suit (mobile receiver suit)

Elevator wireless intercom duty room receiving host suit

Computer Room 1 extension suit (with 1 elevator)

Machine Room 2 extension suit (with 2 elevators)

Data center three branch extension suit (with 3 elevators)

Data center four branch extension suit (with 4 elevators)

Elevator wireless intercom duty room Mobile receiving host

Call transfer to mobile phone module

24-year new 4G online version 1 branch extension suit (free traffic for life)

24-year new 4G network version 2 extension suit (free traffic for life)

24-year new 4G Online Version 3 branch extension suit (free traffic for life)

24-year new 4G Online Version 4-Bureau extension suit (free traffic for life)

24-year new 4G network version host suit (free traffic for life)

IP network extension suit

IP network secondary extension suit

IP network Three-Bureau extension suit

IP network four-branch extension suit

IP network duty room visual receiving host suit

IP network duty room non-visual receiving host suit

4G card extension suit (direct call to mobile phone) three-party call

4G card extension suit (direct call to mobile phone) five-party call