Analogue line interfaces
Datacoms processing ICs
Digital line interfaces
Echo cancellation
Fax chipsets
Interfacing ICs
ISDN circuit ICs
Modem ICs/set
Networking function chips
Telephone ICs/sets - Dialling circuits
Telephone ICs/sets - Feature enhancement
Telephone ICs/sets - Scrambling/encryption
Telephone ICs/sets - Speech circuit
Telephone ICs/sets - Tone ringer