Wireline Telecom - Modems
- Low Power Wireline Data Modems
Low power wireline modems
Public Switched Telephone Network (PSTN)
Least cost routers
Remote meter reading
Subscriber pulse metering
Wireless Local Loop (WLL)
CML's Low Power Wireline Modem products are employed worldwide in all types of communication applications.
CML's highly integrated ICs demand very little power or µC assistance, a factor that often means that the products can be line powered.
The wireline data IC range covers most relevant ITU-T V recommendations and compatible Bellcore data specifications. These single chip wireline data products offer a full suite of wireline signalling functions to cater for complete system operations from line and call set-up right through to the completed data transaction.
AFSK - Audio Frequency Shift Keying.
Bell 202 - Standard for asynchronous 1800bps full duplex modem.
DTMF - Dual Tone Multi Frequency signalling. Generally, a telephone signalling system employing four tones from a low group, and three or four tones from a high group, comprising twelve to sixteen different unique tone-pairs.
DPSK - Differential Phase Shift Keying.
FSK - Frequency Shift Keying: a form of frequency modulation used to transmit two states of a signal each as separate frequencies. FSK is characterised by a frequency spacing of 1.
ITU-T - International Telegraphic Union - Telecommunications: (includes the CCITT and CCIR) is an international telecommunications standards agency.
USART - Universal Synchronous-Asynchronous Receiver/Transmitter. Handles both serial synchronous data and asynchronous data, adding start and stop bits and performing parity checks as required.
Codec - A single device or function comprising both enCOder and DECoder sections.
Rx - The short-cut term for a receiver or receive operation (of any genre).
Tx - The short-cut term for a transmitter or transmit operation (of any genre).