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Product Details
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Avaya > Definity > ISDN Telephones > 8503
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8503 ISDN VOICE TERMINAL

Features:

  • 3 call appearance (rubber dome) buttons
  • 9 fixed feature buttons, 3 with secondary functions
  • Includes easy-to-use fixed key features
  • 12 one-touch speed dial numbers

System Requirements/Compatibility:

  • DEFINITY ECS G2 or G3
  • TN556B BRI ISDN line circuit card
  • Compatible with "custom" IDSN service from your local phone company

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