Rainbow Electronics DS26519 - Manual (Page 237)

DS26519 16-Port T1/E1/J1 Transceiver
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Register Name: TXPC
Register Description: Transmit Expansion Port Control Register
Register Address: 18Ah + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
Bit
# 7 6 5 4 3 2 1 0
Name — — — — — TBPDIR TBPFUS TBPEN
Default 0 0 0 0 0 0 0 0
Bit 2: Transmit BERT Port Direction Control (TBPDIR)
0 = Normal (line) operation. Transmit BERT port sources data into the transmit path.
1 = System (backplane) operation. Transmit BERT port sources data into the receive path (RSERn). In this
mode, the data from the BERT is muxed into the receive path.
Bit 1: Transmit BERT Port Framed/Unframed Select (TBPFUS)
0 = The DS26519’s transmit BERT will not clock data into the F-bit position (framed).
1 = The DS26519’s transmit BERT will clock data into the F-bit position (unframed).
Bit 0: Transmit BERT Port Enable (TBPEN)
0 = Transmit BERT port is not active.
1 = Transmit BERT port is active.