In fact, the PSTN evolved from a purely analog network using analog switches and analog transmission methods to a hybrid network consisting of digital switches, a digital "backbone" (long-distance trunks usually consisting of optical fibres), and an analog "local loop" (the connection from the central office to the customer's premises).
Benzimidazole units have been grafted onto a polysulfone (PSU) backbone via long alkyl thio ether chains using a two-step procedure.
"The Democratic Backbone is long extinct".
We hypothesize that if Val408 is not allowed to coordinate cations with its carbonyl group due to conformational restrictions of the backbone, the long polar sidechains of the second-site alleles overtake this coordination in the double-mutant channels.
"The real question is: do Democrats stand up with backbone for long-time progressive principles or do they treat Donald Trump like a normal president, which he's not, and compromise their principles?" said Green.
In the civil market, satellites have become the backbone of long-distance telephone and multinational television broadcasting, as well as the basis for new communications options such as global mobile telephones (see satellite communication).
"The piecemeal policies in place in many countries must be overhauled in order to boost productivity and support family carers who are the backbone of long-term care systems".
Optical fibers constitute the backbones of long-distance telecommunications networks and are largely responsible for the speed of the Internet.
The data then goes to …. 7 An Internet Service Provider, or ISP, which usually connects the metro network with …. 8 One of the country's 11 major backbones, or long-haul carriers.
Sphingolipids share the common structural feature that all are comprised of backbones called "long-chain" or "sphingoid" bases, which are represented by sphingosine, (2 S,3 R,4 E -2-aminooctadec-4-ene-1,3-diol (also rE -2-aminooctadec-4-ene-1,3-diol) 1, thE -2-aminooctadec-4-ene-1,3-diolmammals.
