The Inter-Tel Axxess 550.0131 9 amp power supply is recommended when there is an EVMC voicemail or a T-1/ PRI. The 9 amp must be used on the Axxess 256 and 512 CPU systems or if using 2 or more DKSC-16/ DKSC-16+ digital station cards.
This INTER-TEL Axxess 550.2300 LSC 4-Port CO Card for Loop Start C. O. phone Lines one open card slot in an Axxess cabinet. An LSC-D daughter card may be added optionally to provide an additional 4 ports for C.O. Lines.