RONNIE@DEEP-THOUGHT.MIT.EDU (Ron S Schnell) (01/11/86)
It seems that whenever I (or anyone) uses SPRINT to dial ANY NUMBER in NPA 305, there is a half second delay. I have verified this by counting into the phone and having the other person attempt to count at thesame time. This is really annoying and I have called SPRINT Customer Service several times but they just keep giving me credit for the calls and it continues. Does anyone have any idea why this happens? Another (more serious) problem I have experienced, is that when I use many of the LD svcs other than AT&T and a couple of others, after being connected for a few seconds, the other person will dissapear for a fraction of a second. This makes it impossible for me to use my modem because carrier gets lost after being connected. This doesn't seem to happen to all areas...617 is one of them. The pitch of the static seems to change after that happens too, and often a lot of the static goes away. I would appreciate it if anyone could fill me in on what is happenning in either or both of these cases. #Ron (ronnie%sutcase.bitnet@wiscvm) (ronnie%mit-eddie.arpa) -------
GRUPP@MIT-MC.ARPA ("Paul R. Grupp") (01/12/86)
The half second delay you refer to is the time it takes to bounce a signal off a 44Kmile orbit satelite. (186,000 Miles_per_Sec/(2*44,000 that's 1/4 sec up plus 1/4 sec back). -Paul
telecom@ucbvax.UUCP (01/14/86)
Not that it matters, but I think it is 22,000 miles to geosynchronous orbit. The delay is 1/4 second one way, but the round trip ( which is important in echo situations ) is 1/2 seconds. I have heard that most long distance voice is done by satellite in one direction and by microwave in the other, this reduces the echo time to ~1/4 second and makes the echo less annoying. Mike