DSX-40 Expansion Cards

• 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.