NEC UX5000 Expansion Blade for Base Chassis (0910020/ IP3WW- EXIFU- B1) Refurbished
For 3 or 6- Blade Base Chassis.
Required for connection between base chassis and up to (3) 0910000 or 0910004 exp. chassis.
Installs in dedicated slot in base chassis.
Also provides (64) additional system resources for DTMF Receivers, Caller ID, and Tone Detection.