1,2N線制電話主機；有單門/8門/16門主機
2,主分互叫；分機摘機即通話，主機顯號
3,可三方通話

Conventional Telephone Panel(Wall-mountedstructure)
1,The main phone can call several extensions one by one and permit
the extensions to communicate.
2,A total of 1/ 8/16 extensions can be providedfor the main phone.
3, Each extension can call the main phone without dialing. And the main phonecan call any of the fitted extension too. What’s more, the extension numberdisplays when it is calling.
4,The systems can start digital recording when communicating.