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Modem* chips

Makers of slow modems:

AMD	Obsolete so expensive!
Texas (TCM3105)	This one is obsolete and therefore expensive!
www.cmlmicro.co.uk/Products/Wireless_Data/	Slow modem* chips by CML

List of modem chips

Date:    19961008
From:    Bruce Cannon
To:      pics@parallaxinc.com
Subject: Re: [PICS] Modem*

I have an application for using PIC16C84 and some serial EEproms in a remote data logger. I have been using an old 2400 baud* external modem* but now need to build in quanity and am looking for a 1200 or 2400 modem* on a chip or few chips. Does anyone have any experience with or knowledge of single chip modems?

Xecom and Cermetek both make totally self-contained single-chip modems for about $60 qty 1. I've used xecom's, but am thinking of switching to Cermetek; seems to be more well documented, and are cheaper and smaller. Both support a simple two-wire interface (TX and RX) to the micro*. NO additional components are required.

Date:    19961016
From:    Pekka Ritamaki
To:      pics@parallaxinc.com
Subject: Re: [PICS] Modem* Cermetek CH1786

I have an application for using PIC16C84 and some serial EEproms in a remote data logger. I have been using an old 2400 baud* external modem* but now need to build in quanity and am looking for a 1200 or 2400 modem* on a chip or few chips.

Xecom and Cermetek both make totally self-contained single-chip modems for

I just finished product development with Cermetek CH1786 2400 modem* module 24 DIP. It connects directly to phone line and 8051 TX,RX pin ( or PIC). It needs 5V DC power and modem* control bit DTR. I use also Ring Indicator bit. It works normally with AT-commands. Basicly it works. Pekka Ritamaki PROBYTE Oy Nirvankatu 31 FIN-33820 TAMPERE Finland www.sci.fi/~pri Electronics product design: hardware+software+development tools puh INT +358-31-2661885 fax INT +358-31-2661886

Date:         16 Oct 96
From:         alan.ballweg@alias.fdn.fr (ALAN BALLWEG)
Organization: Association Informatique & Reseaux - Alias BBS France
To:           PICS@parallaxinc.com
Subject:      Re: [PICS] Re: Looking for so

Does any one have the experience of integrating RF Transmitter/or receiver with the PIC ? Where to get the ready made RF Transmitter and Rcver ( Short range about 10 meters which can send digital data ).
LEE ( Malaysia)