This metal Expansion Carrier lets you install an Integrated Network Access (INA) module, as well as 4400-series telephones
Houses the line and station modules. The carrier has six slots for line and station modules.
Allows off-site staging, so the system hardware assembly and associated programming can be completed prior to installing the system on site
Improves protection for electromagnetic interference (EMI) and radio frequency interference (RFI), and will accommodate future convergence applications
