Module is speedy route to cordless handsets

A novel cordless voice module (CVM) integrates a radio transceiver and baseband with a complete protocol stack on a single board.

A novel cordless voice module (CVM) integrates a radio transceiver and baseband with a complete protocol stack on a single board.

This enables system designers to more easily and cost-effectively design a DECT or 2.4GHz cordless phone or add this functionality to their products.

National developed the CVM in co-operation with RTX Telecom, a Denmark-based wireless product developer.

Because the CVM enables designers to easily integrate phone and data capabilities with a self-contained module, IDT International, which owns the Oregon Scientific brand, selected the CVM for use in its recently announced SMS628 cordless phone manufactured for PCCW, a telecomms operator based in Hong Kong.

The cordless phone allows four-handset operation, multiparty conference, handset speakerphone, caller ID, short message service (SMS), broadcast message and personal assistance.

"IDT specialises in the design, development and manufacturing of innovative consumer electronic products serving a variety of customers with different wants and needs", said Elaine Ng, Vice President of Sales and Marketing for IDT Communication Technology.

"By using National Semiconductor's cordless voice module, IDT is able to provide end products that have all the features available to be modified according to our customer requirements in the fastest time possible".

"This creates tremendous savings both in time and development efforts".

"National's cordless voice module allows customers to easily integrate cordless phone capabilities into a wide range of products where they weren't previously feasible because of complexity, size or cost", said Marius Bouman, Product Marketing Manager for National Semiconductor's Cordless group.

"Now, manufacturers such as IDT are able to use National's CVM to design fully featured cordless phones and bring them to market more quickly than before".

Two versions of the CVM are available.

The SC14CVM2.4 uses National's SC14428 baseband controller, a CMOS chip optimised to handle all the audio, signal and data processing for a 2.4GHz ISM digital band handset or basestation.

The complete protocol stack and application interface are integrated in ROM-code.

RF for the SC14CVM2.4 is provided by the LMX4268, a radio transceiver integrated circuit optimised for the 2.4GHz system.

As a result, the module has an excellent typical range of 350m outside and 75m indoors.

The LMX4268 is a complete DCT radio transceiver compliant with the FCC standard.

The SC14CVM1.9 is optimised for the digital enhanced cordless telecommunications (DECT) standard.

It is also equipped with National's SC14428 baseband controller and with the LMX4168, a radio transceiver integrated circuit.

The LMX4168 has the same specifications as the LMX4268, but is specially designed for the 1.9GHz band and is compliant with the ETSI TBR06 standard.

Samples of the CVM are available now and the module is priced starting at $24.80 in 1000-off volumes.

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