Talk:Trunking

message: Trunk line redirects here, but the article doesn't mention it. This is unfortunate. Harley peters 06:02, 14 November 2006 (UTC)
thread_title:  Trunk Line 

message: A T1 has 24 channels, each of which can carry a voice signal, or be combined to improve data bandwidth.  ( With an IVAD )  Each channel is known as a trunk, while the T1 itself is a trunk group.  Also, a DS3 is 28 T1s, and again, each individual channel would be a tunk, and each T1 would be a trunk group.
While VOIP may change this in future, its time has not yet arrived.  Most telecommunications around the world, even in rich countries, is not performed using VOIP.
DigitalEnthusiast 20:47, 12 December 2006 (UTC)
thread_title:  Accuracy 

message: The 'Derivation' section is utterly confusing. It is not at all clear whether the origins of the term come from the road, the railroad, the trunk of an elephant, or a tree trunk. If they are alternate and competing theories, this should be made clear. I take it that the origins of the term are unclear and the four options are just theories. Is this so? If I don't get a response to my comment, I will go ahead and modify the section to express this ambiguity rather than leave the reader wondering. Montblanc2000 21:37, 23 June 2007 (UTC)
replies: text: Yes, please do.  The mess is partly my fault.  Jim.henderson 03:29, 24 June 2007 (UTC)
thread_title:  Derivation Rework 

message: The elephant trunk theory is cute, but I think it's probably an urban myth.  There 
are plenty of analogous usages - arteries, canals, roads, railways - all of which 
are derived from the tree/branch idea.  I personally favour the railways analogy.  
UK practice tends towards 'trunk' (long distance) and 'junction' (local) lines, 
which could match up to railway usage, although 'main' and 'branch' lines are 
more common, these days, in that area.
GusTheTheatreCat (talk) 10:15, 18 December 2007 (UTC)
thread_title:  Derivation 

message: Hey, I think that radio and telephone trunking is far more common than ethernet trunking.  I'm going to change the order of the sections to reflect that, especially since telephones and radios have been doing it before the personal computer was even invented.  I think even if you make a separate article, this one needs to have some reference to ethernet, but it shouldn't be the first case. --Kraftlos (talk) 18:39, 7 May 2008 (UTC)
thread_title:  Sections 

message: I deleted this section. It was unreferenced since 2009 and was simply a couple of competing guesses. The elephant bit should have been nuked a long time ago. For posterity's sake the text was: 
There are several apparent influences on the use of the "trunking" term in communication networks. The most elemental ones are the natural models of a tree trunk and its branches; tributary streams' confluence with rivers; and river deltas' branching of channels. 
The term's previous use in railway track terminology (e.g., India's Grand Trunk Road, Canada's Grand Trunk Railway), which came from the natural models mentioned above, is another likely influence. Railway networks, with trunks, branches, and switches, were a contemporary model for many decades of the development of telegraph and telephone networks. In fact, turnover of employment among engineers in the railroading and telecommunications industries was not unusual during these decades, which makes the use of these analogies unsurprising. For example, Theodore Newton Vail had been a manager of railroad networks before he became an architect of telephone networks. 
 Another possible explanation is that, from an early stage in the development of telephony, the (up to around 10 cm diameter) containing many pairs of wires.  These were usually sheathed in lead.  Thus, both in colour and size they resembled an elephant's trunk. The elephant's-trunk hypothesis may be a false etymology.
--DouglasCalvert (talk) 20:37, 18 September 2015 (UTC)
thread_title: Deleted Etymology Speculation

message: "In the UK and the Commonwealth countries, a trunk call was the term for long distance calling which traverses one or more trunk lines and involving more than one telephone exchange. This is in contrast to making a local call which involves a single exchange and typically no trunk lines."
Is this really accurate? After all trunk lines and tandem exchanges are still used in a local call when the number being called is served by another exchange that is still in the local call area. The only time a trunk line isn't used is if the number being called is serviced by the same exchange as the caller's number.
Perhaps it would be more accurate to say that even though trunks lines were used in local calling when talking between exchanges in the local-call area, the term "trunk call" came to refer to calls utilising trunks that traversed areas where long distance tolls applied.
Chris Fletcher (talk) 01:55, 26 March 2019 (UTC)
thread_title:  Trunks and local calls