How does TDM work, how do you connect to it? I have the impression it can't be routed like ethernet, but a cable from your switch has to be plugged into the providers equipment. I have seen the Asterisk info about TDMoE - does this mean that the Asterisk card will modulate the signal on the Ethernet cable to allow it plug directly into a proper TDM connection? Will someone please enlighten me. /Obelix ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
On Tuesday 02 August 2005 06:35, Obelix wrote:> I have seen the Asterisk info about TDMoE - does this mean that the > Asterisk card will modulate the signal on the Ethernet cable to allow it > plug directly into a proper TDM connection?TDMoE is just a method of taking the 8000Hz, 8-bit ulaw/alaw audio from a TDM interface and stuffing them into raw ethernet frames. The destination MAC must obviously be on the same ethernet network. Different segments are fine since any competent switch will be able to get the frames to their destination. In a nutshell. Take a raw ethernet frame. You have the ethernet header and the payload. Take the destination MAC and put it in the header, and take the TDM data and put it in the payload. There may be a little more in the payload (timestamps I would suspect). Send it out to the card. That's it. -A.