I'm thinking that, with exchange and stuff, Electrosonic would be better for most of the devices. Can't help but wonder about the MH88500 being a 100 minimum!!! That is probably because they have none in stock. But the MT8808AE and MH88634B are good bets. If the MH88612 is usable in the design, then Electrosonic can be used as well. Teltone in Ottawa will sell 10 of the M991 (I think that is correct) for $6US. These are the Call Progress Tone Generators. That's cheap and they send a free sample (I've yet to receive mine :) If the MH88634 is necessary (as per my previous email) then I guess Insight (out of Alberta) would be the place for those! John Mullan -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Keelan Lightfoot Sent: Sunday, November 21, 1999 12:18 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: Help: Connecting Phones I'm looking at Electrosonic's results, and it looks like a minimum purchase of 100 per device. Okay, back to Insight :) - Keelan Lightfoot