Avaya Definity TN556B 12-Port ISDN-BRI 4-Wire S/T Circuit Pack - Refurbished
- Part number
- TN556B
Only 3 left
Cleaned, tested and factory defaulted.
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Description
The TN556B is a 12-port ISDN-BRI line circuit pack with a 4-wire S/T interface for Avaya (Lucent) Definity systems. It connects ISDN-BRI telephones and terminals and matches a TN556B in an existing carrier.
Condition: Refurbished. Cleaned and fully tested.
What's included
- TN556B circuit pack
Not included: Trunk cabling and cross-connect hardware.
Key features
- 12 ISDN-BRI ports (2B+D each)
- 4-wire S/T interface on the network (NT) side
- Connects ISDN-BRI telephones and terminals, such as 8500-series sets
- Ports can also terminate ASAI links to adjunct applications
- Single-slot TN circuit pack
Specifications
| Part number | TN556B |
|---|---|
| Ports | 12 |
| Interface | ISDN-BRI, 4-wire S/T (NT) |
| Compatible systems | Avaya Definity TN port carriers |
Compatibility
- Avaya (Lucent) Definity systems with TN-style port carriers
- ISDN-BRI voice terminals and data equipment
Before you buy
- Match the suffix on your existing board; later systems typically specify the TN556D.
- BRI trunks to a carrier use a different board (TN2185-series); this card serves the line (terminal) side.
Part numbers
- TN556D: Later vintage
Warranty: This item comes with a 1-year warranty from Enterprise Resale Solutions.
Warranty and returns
Every order comes with our 90-day money-back warranty. Some items include a longer warranty, noted in the description. If there is a problem with an item, we replace it if we have stock, with a prepaid return label. Read the full warranty and return policy.
Avaya Definity TN556B 12-Port ISDN-BRI 4-Wire S/T Circuit Pack - Refurbished
$73.95