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- Styling matches IP500 Control Unit
- Adds an additional 30 Digital Station ports to the IP403, IP406, IP412, and IP500
- Provides Digital Station (DS) ports supporting 24xx, 44xx, 54xx and 64xx Series phones plus 3810 and 9040 phones
- For systems where Direct Station Select (DSS) Units are being used, IP Office supports a maximum of:
- Eight EU24 and or EU24BL per system.
- Two XM24 units on each Digital Station expansion module, including the IP406 control unit, to a maximum of 10 XM24 units per system.
- Two 4450 units on each Digital Station expansion module, including the IP406 control unit, to a maximum of 10 4450 units per system.
- Not Included: Power Lead
- Included: IP400 EXP RJ45 / RJ45 1M Blue for connecting Expansion Module to Base Unit