TN556B - TN556D ISDN BRI 4-WIre Interface
Provides 12-ports connecting to ISDN-BRI terminals. Each port uses TXT, TXR, PXT, PXR signal leads and ranges up to 3300 feet maximum from the system to the voice terminal.
- Ports connection to ISDN-BRI terminals: 12
- Signal leads: TXT, TXR, PXT, and PXR
- Up to 8 ports can be used for ASAI links
- 2 B-channels
- 1 D-channel
- Range up to 3300 ft.
- Compatible with Definity R7 or late
- Requires a packet control circuit pack (TN778) if using R6si systems
- One Year Warranty Included with Extended Warranty Options at Low Prices!
- TN556D ISDN BRI 4-WIre Interface