29 Years of the Digest ... founded August 21, 1981
The Telecom Digest for June 04, 2011
====== 29 years of TELECOM Digest -- Founded August 21, 1981 ======
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Date: Fri, 03 Jun 2011 08:31:12 +1000 From: David Clayton <email@example.com> To: firstname.lastname@example.org. Subject: Re: DSL Reports: AT&T Caps Have Arrived Message-ID: <email@example.com> On Thu, 02 Jun 2011 09:58:34 -0400, tlvp wrote: ......... > That's where European operators treat their clients much nicer -- inbound > calls and inbound messages arrive at no charge to the recipient (in the > case of the Polish operators Orange and Play, in fact, even after your > starter SIM's stored value has gone to zero, you can receive for at least > a year from your SIM's date of first use). > Same as Australia, I used to have a very cheap pre-paid SIM that I rarely made outgoing calls on and it basically cost me $30 a year for a number that I could receive incoming calls. -- Regards, David. David Clayton Melbourne, Victoria, Australia. Knowledge is a measure of how many answers you have, intelligence is a measure of how many questions you have.
Date: Thu, 2 Jun 2011 21:06:38 -0400 From: "ABLE1" <firstname.lastname@example.org> To: email@example.com. Subject: Re: Need some help Message-ID: <BsWFp.firstname.lastname@example.org> >>What I can't find is this at 25v 70v or 100volt. > > Probably all of the above. The output transformer has multiple taps. > It's 100 watts at 25v on the 25v tap, 100 watts at 70v on the 70V tap, > 100 watts into 8 ohms on the 8 ohm tap. > > Are the transformer taps labelled at all? > What is the amplifier driving? Measure the load impedance with a bridge, > or open up one of the speakers in the chain and see what's inside it. > >>I hate shooting in the dark. With the amount of dark I have right now any >>glimmer of light would be a blessing. > > What is the amp driving? Which taps on the transformer are being used? > --scott That is the problem, The terminals are not labeled. Wish they were. Was hoping to find info on the speaker numbers. >> Connected to multiple speakers that are labeled D31201-0500 VRC8 with >> a multi-tap Txfmr L50411-0010. I have to assume that it is 70.7volts. It seems the most logical. Have not been given the green light as yet to replace the amp. I plan on installing a Bogen 100 Watt Amp, it has taps for 25 and 70 volts. I could play it save and connect to 25volts and test and if output is surprisingly low the jump up to 70volts. Shouldn't hurt any thing at 25volts. Thanks for any input. Les
Date: Thu, 2 Jun 2011 18:54:58 -0700 (PDT) From: Paul Robinson <email@example.com> To: firstname.lastname@example.org. Subject: Re: Pre-paid SIM cards in the US Message-ID: <email@example.com> On May 19, 1:59 pm, Dave Garland <dave.garl...@wizinfo.com> wrote: > On 5/18/2011 8:28 AM, John Levine wrote: > > > T-Mo and AT&T will both sell you a SIM. I bought an AT&T SIM a > > couple of weeks ago, I think for $25 plus the airtime. > > With T-Mo anyhow, for $20 or so you can get both the SIM and a cheap > phone at a mass-market vendor like WalMart, Target or K-Mart. That's > where I get mine (I lose/break phones). While I haven't tried using > the SIM in the phone branded by another vendor, I have switched SIMs > between various T-Mo-locked phones without any problem, and ISTM that > it ought to work in any unlocked phone. I once spoke to a clerk at a T-Mobile store, because I wanted to find out about replacing the lost back on the phone I had or what it would take to replace the phone. He told me that you can use any T-Mobile sim in any T-Mobile phone, so in my case, where my phone is on a regular account, I can pull the sim out of it, and put it in any T- Mobile phone, including a T-Mobile prepaid phone, and the new phone will be recognized by T-Mobile's network as the phone that sim card is assigned to. So if his phone will work on T-Mobile, buying a pre-paid phone, getting it set up, then moving the sim card to his old phone should allow him to use it on the pre-paid number in the U.S. When he goes back to Europe, switching the sim card back should put him back on his old number. At least that's how I understand it.
Date: Thu, 2 Jun 2011 19:03:43 -0700 (PDT) From: Paul Robinson <firstname.lastname@example.org> To: email@example.com. Subject: Re: Busy trunks--subscriber behavior Message-ID: <firstname.lastname@example.org> On May 3, 12:29 pm, Lisa or Jeff <hanco...@bbs.cpcn.com> wrote: > These days it is very rare to run out of trunks or switching > capacity. However, during emergency situations, such as after heavy > storms or other natural disasters, or other major emergencies, there > may be a temporary overload on telephone facilities. > > If this happens the switches may get overloaded. If a caller hits a > busy signal (of any type), they'll try again very quickly. These > unsuccessful call attempts represent a load on a switch. > > Years ago a flood of call requests to an ESS might cause the entire > switch to fail; I'm not sure if today's switches have the same > limitation. A telephone switch isn't a mechanical device any more. Look at what your monitor is connected to and you'll see what a telephone switch is now. That's right, it's a computer, albeit a single-purpose one and a lot bigger. Note that nowadays you can run a PBX for a small to medium-sized office (and all a PBX is is a telephone switch that the customer owns instead of the telephone company) using Asterix on a dedicated PC. The hardware reliability for phone company switches might be higher as the components aren't the least expensive ones, but even todays PCs are fairly high-reliability machines. The software running the switch, on the other hand, is much more reliable, it's equivalent to BSD or Linux uptime levels, e.g. 99.97% reliability.
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