Description
TN776 Expansion Interface (for R6 or earlier si)
- Connected to the Time Division Multiplexing (TDM) bus in one Port Network (PN) is an interface between that PN and the TDM bus extended to another PN
- Packages the TDM control channel with Link Access Procedure on the D-channel (LAPD) for transmission over the fiber link between cabinets
- Provides the time-slot interchange between cabinets
- A system with ASAI/BRI or with PRI signaling for the packet bus (PACCON) requires a TN570B/C EI circuit pack in place of a TN776 circuit pack
- Replace by TN570B/C in R7si and later