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Wireline Telecom - Telephony

- Low Power Telephony Voice and Signaling Products


Applications

  • Low power wireline
  • Modems and wireline telemetry
  • Telephones, Featurephones
  • Payphones and PABX
  • Calling line ID (CLI)
  • Public Switched Telephone Network (PSTN)
  • Integrated System Digital Network (ISDN)
  • Least cost routers
  • Pair-gain systems
  • Internet appliances
  • Set-top boxes
  • Remote meter reading
  • Subscriber pulse metering
  • Wireless Local Loop (WLL)

To jump to Wireline Modems click here >>> Wireline Modems

CML's wireline telephony products cover all aspects of a telephone system's operating requirements in the analogue, digital and mixed signal fields and are employed worldwide in all types of communication applications.

CML's highly integrated ICs perform the majority of telecoms voice, signalling and data functions whilst demanding very little power or µC assistance, a factor that often means that the product can be line powered.

Analogue, digital and mixed-mode (POTS-to-ISDN) products are also available singularly, or in multi-feature combinations.

The telephony range of IC products covers all of the voice and signalling requirements of a modern day telephone system.

From Rx/Tx DTMF, calling-line ID and call progress functions through-to voice recognition in both the digital and analogue domains, these products also offer on-chip line/phone interfacing.

Product
Description
Digitally
Controlled
Amplifiers
Data 
Signalling
Supply
Voltage
Typ.
Current
Package
Type
Key Benefits

CMX673

Call Progress Tone Detector

-

-

Single Call Progress
Dual Tone Detectors

2.7 - 5.5
V

0.5
mA

16-pin SOIC
20-pin
TSSOP

Universal call progress detector

CMX683

Call Progress Tone Detector Plus Voice Detector

-

-

Single Call Progress
Dual Tone Detector

2.7 - 5.5
v

0.6
mA

16-pin SOIC
TSSOP

Call progress detector with voice detection

CMX602B

Calling Line Identifier Plus Call Waiting

-

V.23 Demodulation

CLI Decoder
CIDCW Decoder

2.7 - 5.5
V

0.5
mA

16-pin
SOIC

TSSOP

Featurephone
applications

CMX612

Calling Line ID Plus Tone Decode for VMWI

-

V.23/Bell 202
Demodulation

CLI Decoder
CIDCW Decoder
VMWI Decoder

2.7 - 5.5
V

0.5
mA

20-pin TSSOP

Featurephone
applications

CMX631A

SPM Detector

-

-

SPM Detector
(12kHz/16kHz)

2.7 - 5.5
V

0.8
mA

16-pin SOIC
PDIP

24-pin SSOP

Payphone applications

CMX641A

Dual SPM Detector Plus Payphone Security

-

-

Dual SPM Detector
(12kHz/16kHz)

2.7 -5.5
V

1.2
mA

24-pin
SOIC

PABX applications

CMX605

Digital-to-Analogue (POTS) Signalling Interface - with DTMF Encoder - Decoder

-

FSK V.23/Bell 202

DTMF
SPM Generation
Ringing Signals
Flexible Tones
Fax/Answer Originate

2.7 - 5.5
V

1.6
mA

16-pin
PLCC

Ideally suited to WLL, FWT, CWT applications

Glossary

CIDCW - Caller Identification on Call Waiting.
CLI - Calling Line Identification: a telephony network service that transmits the caller's telephone number and, in some systems, the caller's name to the called party's telephone equipment during the ringing signal or when the call is being set-up but before the call is answered - also refered to as 'Calling Line ID', 'CLIP', 'CLID' and 'CID'. Generally the calling number is shown on a screen of the receiving party's telephone set (if so configured).
ISDN - Integrated Services Digital Network: a circuit-switched telephone network system, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better quality and higher speeds than that available with the Public Switched Telephone Network.
PCM - Pulse Code Modulation: a process by which an analogue signal is sampled and converted to a binary code for transmission.
The magnitude of the analogue signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code.
POTS - Plain Old Telephone System: the original basic analogue telephone system (PSTN).
SPM - Subscriber Pulse (or Private) Metering: a method of measuring wireline telecom 'call' periods.
VMWI - Visual (or Voice) Message Waiting Indicator: an FSK message sent without power-ringing to a CPE to activate an LED or other visual indicator on the receipt of voice mail at the local phone company.
VoIP - Voice Over IP: any telephony application that can be enabled across a packet-switched data network via Internet Protocol.
WLL - Wireless Local Loop: a wireless communications system used to extend the range/capacity of a wireline communications system in areas where there are no copper telecommunication cables or it is uneconomical or physically difficult to install them. 

 
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