Mailing Lists

Avaya Definity TN556D ISDN-BRI 4-Wire S/T-NT Interface (12-Ports) Refurbished

< Previous Next >
Avaya Definity TN556D ISDN-BRI 4-Wire S/T-NT Interface (12-Ports)
Price: $254.99
Store #: 5186-R
Manufacturer: Avaya
Manufacturer Part No: 73640
Trade in & Save
Free Shipping on all orders!
Most orders ship within 1 business day.
1-year warranty

Features:

  • Provides 12-Ports connecting to ISDN-BRI terminals
  • Each port has TXT, TXR, PXT, and PXR signal leads
  • Up to 8 ports can be used for adjunct switch application interface (ASAI) links
  • Each port operates at 192 kbps per second and has 2 B-channels and 1 D-channel
  • Requires a packet control circuit pack (TN778) when used in R6si systems or packet bus-equipped R6vs systems
  • Range of up to 3300 ft. maximum from the system to the voice terminal
  • Can connect 24 terminals where each terminal uses 1 B-channel and shares the D-channel
  • Compatible with Definity R7 or later


If you want to buy a certain quantity and want a volume discount, submit this form and a sales advisor will be in touch with you shortly.
Looking for a manual for your product? Check out our free product manual directory by clicking here.

Needs to find a local technician to service your equipment? Our map of local technicians can help you find experts in your area that can help. Click here to view map

Need help adjusting the time? We provide a tutorial on setting the clock on major phone system brands here.

Need to contact the product manufacturer? click here to see a directory of their phone numbers.

Telephones