Bogen CM211M Button Administrative Intercom System, 6 or 11 Station capacity, All-master system or any combination of masters and remotes, Multiple simultaneous conversations - up to 5 in an 11 station system, Selective electronic tone calling.
  
 Bogen CM211M Button Administrative Intercom System, 6 or 11 Station capacity, All-master system or any combination of masters and remotes, Multiple simultaneous conversations - up to 5 in an 11 station system, Selective electronic tone calling, Masters can call any station in system, Remote station can only call its associated master station. 
  
 Eleven-button master with talk and talk-lock buttons, volume control for talk and call tone privacy function to prevent unauthorized monitoring. Up to 5 simultaneous two-way conversations can take place at once.
  
 Features:
   - Choice of 6 or 11 station capacity  
 - All-master system or any combination of masters and remotes  
 - Multiple simultaneous conversations - up to 5 in an 11 station system  
 - Selective electronic tone calling (masters only)  
 - Masters can call any station in system  
 - Remote station can only call its associated master station