> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Nicolas > Bougues > Sent: Tuesday, December 30, 2003 9:18 AM > To: [EMAIL PROTECTED] > Subject: Re: [Asterisk-Users] Backup Proxy & Automatic Failover > > > On Tue, Dec 30, 2003 at 06:49:51PM +0000, Adthrawn wrote: > > Hi, > > > > The term TDM is banded around too, but from my knowledge, TDM is > > trunking (probably some clever acronym relating to trunking), and in > > Asterisk's case, using the IAX protocol. This leads me to the big > > question; > > > > TDM is time division multiplex. It's how phone calls are sliced on > digital lines. >
>From the old Bell System/AT&T "Darth Vader" University in Colorado: -) TDM was developed for the PSTN. TDM allows the transmission of isochronous traffic (time and bandwidth critical traffic). TDM over a point to point link guarantees bandwidth. Synchronous line transmission (one end owns the clock, the "master") provides guaranteed interframe latency. In a lan (CSMA) you can use qos to (hopefully) guarantee bandwidth and jitter buffers to (hopefully) guarantee interframe latency. And I never used the words T, DS, OC, bit-robbing or super frame :-) _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
