Lucent 400EC Expansion Module with Caller ID (4x0)

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Adds 4 incoming lines with Caller ID support.
Features:
- Same functionality as the 400E module, but includes Caller ID information on display telephones
- Lines with Caller ID must connect to this module
- Compatible with Partner Endeavor v2.0, Partner II, or Partner ACS
- Available in both new and refurbished options
