> I am trying to calculate bandwidth needs. Is 1 T1 Line able to provide > 488.5 Gigabytes of traffic for 1 month based on a 30 day week? I did my > calculation as follows: > > 1.544 mps * number of seconds in a minute(60) * number of minutes in a hour > (60) * number of hours in a day(24) * number of days in a month(30) = > 4002048 megabits / 1024 = (3908.25 gigabits) / 8 = (488.53125 gigabytes) of > bandwidth for a T1 Line. > > Please correct me if I am wrong.
If you're doing the above calculations for the purposes of engineering bandwidth requirements for * trunking (whether sip or iax), then you might want to consider doing this using a shorter timeframe (maybe an hour as one example). The telephony engineering types that do this for a living often times use "peak busy hour" traffic to engineer bandwidth, and express their calculations in terms of what the probability is of a user incurring blockage (no bandwidth available) during that period. That would imply calculating the bandwidth available per hour, dividing the bandwidth consumed per codec, etc, to reach a number that says something like "x number of simultanous calls can be supported". The x+1 call will fail 99% of the time (or some such approach). Of coarse, one has to consider each type facility (half duplex ethernet: 20% - 30% max before quality drops; full duplex ethernet: 90% roughly; full duplex T1: ~95%; number of isdn trunks, etc, etc.) _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
