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PEF24911 - Quad ISDN 2B1Q Echocanceller Digital Front End
STLC5411 - 2B1Q U INTERFACE DEVICE
TP3410 - TP3410 ISDN Basic Access Echo-Cancelling 2B1Q U Transceiver
STLC5412 - 2B1Q U INTERFACE DEVICE ENHANCED WITH DECT MODE
PEF81912 - (PEF81912 / PEF81913) 2B1Q Second Gen
PEF81913 - (PEF81912 / PEF81913) 2B1Q Second Gen
BT8960 - Single-Chip 2B1Q Transceiver
