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  • Part #: DSX-1091001
  • Model: 4COIU-S1

This expansion card will allow you to add up to 4 additional CO lines to your DSX-40 digital business phone system.

  • Part #: DSX-1091002
  • Model: 8ESIU-S1

Looking to expand the amount of digital stations your business needs? This digital station card will give you 8 extra ports so you can add up to eight digital phones for your digital business phone system.

  • Part #: DSX-1091003
  • Model: 8SLIU-S1

Adding this card you can expand your DSX-40 KSU to utilize an additional 8 analog ports for single line telephones, fax machines, credit card machines or other analog devices.

3 items found in DSX-40 Cards. Showing 1 - 3

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