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Wireline Telecom - Modems

- Low Power Wireline Data Modems


Applications

  • Low power wireline modems
  • Wireline telemetry
  • Pair-gain systems
  • Public Switched Telephone Network (PSTN)
  • Least cost routers
  • Internet appliances
  • Remote meter reading
  • Set-top boxes
  • Subscriber pulse metering
  • Wireless Local Loop (WLL)
  • Banking/billing systems

To jump to Wireline Telephony click here >>> Telephony

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.

Product
Description
V.32
V.22
V.23
V.21
Bell
202
Bell
103
DTMF
CLI
Supply
Voltage
V
Typ.
Current

mA
Package
Type
Key Benefits

CMX869B

V.32 bis Modem

Y
bis

Y
bis

Y

Y

Y

Y

Y

Y

3.0 - 3.6

8.6

24-pin
SOIC

TSSOP

Ring Detect
USART
Hybrid support
Line equalisation

CMX868A

V.22 bis Modem

-

Y
bis

Y

Y

Y

Y

Y

Y

2.7 - 5.5

3.0

24-pin
SOIC
SSOP

Ring Detect
USART
Hybrid support
Line equalisation

CMX867A

V.22 Modem

-

Y

Y

Y

Y

Y

Y

Y

2.7 - 5.5

3.0

24-pin
SOIC
TSSOP

Ring Detect
USART
Hybrid support
Line equalisation

CMX865A

DTMF/FSK
Combo

-

-

Y

Y

Y

Y

Y

Y

3.0 - 3.6

4.0

16-pin
SOIC
TSSOP

Hybrid support
and Audio codec access

CMX860

Telephone Signalling
Transceiver

-

-

Y

-

Y

-

Y

Y

2.7 - 5.5

3

28-pin
SOIC

Hybrid support

CMX850

Communications Controller With Embedded 8051

-

Y

Y

Y

Y

Y

Y

Y

3.0 - 3.6

6.8

100-pin LQFP

Line reversal detect
Off-hook detect
Watch-dog timer
UART
AUX ADC
PWM outputs
Embedded 8051

FX604
MX604

V.23 Compatible Modem

-

-

Y

-

-

-

-

-

3.0 - 5.5

1.0

16-pin
SOIC

PABX applications

FX614
MX614 

Bell 202 Compatible modem

-

-

-

-

Y

-

-

-

3.0 - 5.5

1.0

16-pin
SOIC

Ideally suited to WLL, FWT, CWT, HART applications

Glossary

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).

 
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