30 Years of the Digest ... founded August 21, 1981 Add this Digest to your personal   or   The Telecom Digest for January 11, 2012 Volume 31 : Issue 10 : "text" Format Messages in this Issue: Different clock sources for STM-1 and E1 ?? (René Hüftlein) Will LightSquared's troubles push Leap into the arms of Clearwire? (Bill Horne) more on at&t T-Mobile merger (HAncock4) The FCC and low power FM radio (HAncock4) Re: Fwd: Telephone Exchange Names (Wes Leatherock) ====== 30 years of TELECOM Digest -- Founded August 21, 1981 ======

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Date: Tue, 10 Jan 2012 10:01:02 +0100
From: René Hüftlein <017renegade@googlemail.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Different clock sources for STM-1 and E1 ?? 
Message-ID: <CAJ3BNFUhDSz9zs_1x1igajYvb7NaTVxg7OvwHjBdRkB4xAxFJQ@mail.gmail.com>

Hi!

Maybe someone here can help me with a problem we have with our PSTN
gateway.

We receive 63 E1's channelized into a STM-1. The E1's are provided by
DTAG (German PSTN) and are multiplexed into the STM-1 provided by
Verizon. STM-1 directly terminates in a Audiocodes Mediant 3000 which
demultiplexes STM-1 and routes E1's respectively.

We see a huge number of Controlled Slips (one in 20 seconds) and it
seems this condition causes fax calls to crash.

We got in contact with Verizon and they told us, that they are
receiving DTAG's E1's in sync with a PDH clock and transparently
multiplex that into the STM-1 which is clocked by a different master
clock. (As it is not their policy to generate clock from external
sources and PDH can not be used for SDH clock source - that's what
they said) [For what I read on the interwebs SDH was specially
designed to support relaying of PDH - so I don't really get the
point...]

So we receive E1's and STM-1 on different source clocks. Unfortunately
Audiocodes tells us the gateway only supports one single clock source,
which has to be the STM-1 or any external clock directly connected to
the device.

I appreciate any hints or tips on this issue (or any lesson on PSTN
clocking) as I am used to deal with IP networks on the very higher
layers...

Cheers Ren~



Date: Mon, 09 Jan 2012 20:04:06 -0500
From: Bill Horne <bill@horneQRM.net>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Will LightSquared's troubles push Leap into the arms of Clearwire? 
Message-ID: <4F0B8E86.6070208@horne.net>

from the "Editor's Corner" at FierceWireless:

   During a recent appearance at the Citi Entertainment, Media and
   Telecommunications Conference, Leap (NASDAQ:LEAP) CEO and President
   Doug Hutcheson was asked whether the carrier would consider a
   wholesale teaming or partnership with another company to supplement
   Leap's own LTE buildout.

   Answered Hutcheson: "When we make a decision on whether we invest
   or do a wholesale agreement we go all the way down the P&L and look
   at the ROI. And so to the degree that we can see attractive pricing
   on a wholesale basis, whether that is roaming or data, that is
   something that the business has been open to traditionally and
   would be open to in the future."

Rest is at
http://tinyurl.com/6nzxe7x

-- 
Bill Horne
339-364-8487



Date: Mon, 9 Jan 2012 09:19:45 -0800 (PST)
From: HAncock4 <withheld@invalid.telecom-digest.org>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: more on at&t T-Mobile merger  
Message-ID: <fc75104a-d82d-4f74-8965-94e9e145068b@p4g2000vbt.googlegroups.com>

A December article in the Philadelphia Inquirer's business section, by
columnis Jeff Gelles, explores the (now DOA) AT&T/T-Mobile merger.

   Calls from WiFi hot spots that don't count against your
   minutes. Unlimited calls to a list of your favorite
   contacts. Shared family data plans. "Soft" data caps that slow
   downloads and uploads by heavy data consumers without slapping them
   with huge overage fees.

   Those are just a few of the innovations that T-Mobile has brought
   to the U.S. wireless market in recent years, according to a report
   by Federal Communications Commission staffers who reviewed AT&T
   Inc.'s proposed $39 billion acquisition of T-Mobile USA Inc.

   If there were ever any real wonder why AT&T wanted to swallow up
   T-Mobile - and there really shouldn't have been - the FCC has done
   a good job of laying it to rest.

   In that same report, made public Tuesday to AT&T's heated
   objections, FCC investigators said the merger partners exaggerated
   the likely benefits and understated the probable harms of a deal
   that would cut the number of national wireless carriers from four
   to three and eliminate the carrier that typically offers
   subscribers the lowest price.

for full article please see:

http://tinyurl.com/6wmww44



Date: Mon, 9 Jan 2012 09:16:44 -0800 (PST)
From: HAncock4 <withheld@invalid.telecom-digest.org>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: The FCC and low power FM radio 
Message-ID: <87c55b7c-f993-4620-a2fc-acb3e0a33dbc@n6g2000vbg.googlegroups.com>

Because of the interest in radio of many on this newsgroup the
following post is submitted.

The Phila Inquirer reported on how a former "FM pirate" has been
working with the FCC to grant licenses for up to 3,000 new low-power
FM stations nationally.

   For more than a decade, a West Philadelphia buccaneer fought the
   Federal Communications Commission for access to the airwaves using
   Pete Tridish - "petri dish" - as his nom de guerre. The name took
   hold in 1997 when he cofounded Radio Mutiny, the pirate station
   whose two years on the dial helped bring "low power" to the people.

   This year, largely because of the efforts of Tridish and the
   organization he created, called Prometheus Radio Project, the FCC
   will grant licenses for up to 3,000 new low-power FM stations
   nationally, with an estimated five to 10 in the Philadelphia area.

For full article please see:

http://tinyurl.com/6r4zsnq



Date: Tue, 10 Jan 2012 07:18:45 -0800 (PST)
From: Wes Leatherock <wleathus@yahoo.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Fwd: Telephone Exchange Names 
Message-ID: <1326208725.46726.YahooMailClassic@web111716.mail.gq1.yahoo.com>

--- On Sat, 1/7/12, John F. Morse <john@invalid.telecom-digest.org> wrote:

> Bill Horne wrote:
> 
> 
> > I came across this article in Wikipedia: hope it's of
> interest.

> > During the early years of telephone service, communities that
> > required more than 10,000 telephone numbers, whether dial service
> > was available or not, utilized exchange names to distinguish
> > identical numerics for different customers.
> >
> > When dial service was introduced (typically during the period of
> > 1910 to 1970), in such multiple exchange communities, customers
> > would normally dial the first two or three letters of the exchange
> > name, followed by the numeric digits.
> > 
> >
> > http://en.wikipedia.org/wiki/Telephone_exchange_names
> > 
> 
> This was a common practice in the Kansas City area for exchanges
> along the Kansas-Missouri border.

[Moderator snip]
 
> Both the WEstport and HIland buildings served some Kansas customers,
> mainly in the Johnson County suburbs. The names were different to
> keep billing separate (different tariffs, taxing, etc.). Long before
> 9-1-1 so get that out of your mind.

One of the other reasons for different prefixes for Kansas and
Miassouri customers was so long distance calls from those numbers
could be properly rated as interstate or intrastate.

This occurred in many places near or on a state border with a
C.O. serving customers in both states.

Wes Leatherock
wleathus@yahoo.com
wesrock@aol.com

 





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