Inter‑Tel model 550.2500 is the Single‑Line Adapter used on Axxess systems to turn one DKSC station port into two analog single‑line ports. Typical uses are adding a fax, modem, cordless set, door box, or other analog device alongside digital sets. The steel enclosure has SL1 and SL2 jacks with RUN and BUSY indicators, a DKSC port, and a 24VAC power input with ground lug. This unit shows normal cosmetic wear from prior use; power supply is not included. Mounting ears are present for wall install. Check system compatibility and provisioning before deployment.

Item Breakdown

• Brand: Inter‑Tel

• Model: 550.2500

• Type: Single‑Line Adapter SLA

• Function: Converts one DKSC digital station port to two analog single‑line ports

• Ports: SL1 and SL2 labeled jacks with RUN and BUSY indicators

• System: Inter‑Tel Axxess family compatibility noted in vendor literature

• Power: 24VAC input required

• Ground: Chassis ground lug present

• Connectors included: two beige line plugs with short leads (as shown)

• Mounting: Integrated wall‑mount ears with keyhole slots

• Country of manufacture: USA (label)

• Condition: Used, cosmetic wear from prior service; power supply not included