Talk:Plain old telephone service

message: What kind of watts and amps move over these lines?
I don't know about watts and amps, but typical phone wires operate with -40vdc on them when idle (negative voltage impedes oxidation/corrosion), and in the area of -22vdc when 'off-hook.'  
Ring voltage is about 110vac in bursts.  This was originally meant to actually power the classic telephone ringer bell, but today's phones look for that AC signal to turn on thier solid state ringers.  On a side note, Caller ID is transmitted between the first and second ring signals.
DSL, T1 and other data circuits typically operate at a higher voltage, from 90-220vdc.
On a dry day, you can handle bare telephone wires and the -40vdc does not pull enough amperage for you to feel it, though you will get a good tingle if you are in contact with a good ground.  Even ungrounded, ring voltage will get your attention quite well.
Hope that helps some.
I'm not sure where the above mentioned -40vdc comes from but I can tell you that virtually all telephone company equipment is powered by -48vdc (forty-EIGHT) power plants located at the telephone company central offices. It is possible that the line voltage FROM the equipment is different than the -48 INPUT voltage. It is also very possible that the voltage MEASURED on the line in a home is much less than the voltage PUT on the line in the central office because of the loss in the circuit. Bellhead 00:24, 25 December 2006 (UTC)
replies: text: Nominal values as sent from the CO: DC/battery -48vdc, and Ring 90vac.  These values can be lower at the jacks in you house due to volt drop in the possible miles long wire from the CO to your house.  DC/battery is 6-8 vdc when off hook.  My DSL line certainly has standard -48vdc CO voltage.  In alot of cities and burbs POTS lines are likely not going all the way back to the CO.  There will be digital Pair Gain going on where the POTS lines will originate from the Pair Gain equipment much closer to the customers being served.  66.114.93.6 (talk) 05:13, 25 July 2011 (UTC)

text: Added a section heading.  Anyone who can improve it is welcome,  Regards, PeterEasthope (talk) 01:48, 12 May 2011 (UTC)
thread_title:  Power Available to a POTS Circuit 

message: POTS stands for Plain Old Telephone Service and has been used for many decades. It is a plain old analog phone line to connect to a plain old telephone and the technical parameters that made that happen.
PSTN stands for Public Switched Telephone Network and has been used for a shorted period of time. It primarily describes, as the name suggests, the really big picture of calls being connected (switched) throughout the country and the world. It is not a specific technology but thousands of technologies that work together to get a call from one place to another  — Preceding unsigned comment added by Foggieday (talk • contribs) 18:06, 23 September 2013 (UTC)
replies: text: PSTN decribes the overall networking, while POTS describes the specific voice grade service provided to customers.  I see no reason for a merger.--Donovan Ravenhull 20:54, 1 February 2007 (UTC)

text: I strongly disagree. I've been in the industry for 25 years and use the term "POTS" all the time. My colleagues are very familiar with it too. For example, the term "POTS line" is frequently used to specify a type of phone line (and its associated services) and to differentiate it from an "ISDN line", a "CENTREX line", a "PBX line", etc. Granted, it is not a marketing term and is probably not commonly understood outside the industry. Snafflekid  summed it up well (see above). Bellhead (talk) 15:27, 27 August 2009 (UTC)

text: Is there a chance that the term "POTS" arose in AT&T Bell culture after the 1959 Bell Canada/AT&T split and Canadians didn't encounter it so much?  It's pretty much the one and only term used between telecom people for a traditional phone line in the U.S.  I've had to deal with SBC/AT&T (local RBOC), GTE, and CLECs since the mid-1990s, and they all refer to traditional telephone signals as POTS and "POTS lines", to distinguish those lines from proprietary PBX signalling, ISDN, PRI, and channelized T1, all of which were running on nearby pairs also, and the last three of which were all considered PSTN here also, at least by the terminology we used: they all went right back to the telephone central office, all had phone numbers, and all could take calls.  POTS was the kind of PSTN service that you could hook a normal telephone to.  For Stephen Brown: Are ISDN or PRI talked about as being "PSTN" in Canada? --Closeapple (talk) 15:42, 28 August 2009 (UTC)
thread_title:  Merge with PSTN? 

message: As and adendum, I can testify first hand that my 1915 Western Telephone candle stick phone still works even after I switched to FIOS fiber optics services via the POTS 4 wire telephone copper lines.   To put it another way, I can call my wife from my 100 year old candle stick phone from my home over FIOS to her mobile phone with reasonable quality.  It does sound like an antique phone, but its good enough.  Alexander Graham Bell would be proud Im sure.  —Preceding unsigned comment added by TmasAv8r (talk • contribs) 20:52, 29 November 2010 (UTC)
replies: text: How do you dial?  Bouncing the hook-switch at the right rate? Or, does your wife just call you? — Dgtsyb (talk) 22:21, 30 November 2010 (UTC)

text: That image is of a 1920's phone.  The 1915 models did not have a dial. — Dgtsyb (talk) 01:05, 1 December 2010 (UTC)
replies: text: Some telephone companies were dial by 1915, but these were mostly independents as the Bell System only began deploying dial exchanges in 1919. I presume then this Western Telephone was not Western Electric, Bell's manufacturing arm. K7L (talk) 01:53, 30 December 2013 (UTC)
thread_title:  Combining the old with the new telephonic technology 

message: I am increasingly becoming aware that generators are run at modern COs when the power fails these days.  66.114.93.6 (talk) 08:44, 28 March 2012 (UTC)
replies: text: The battery is still there. It takes time to start a generator and all calls would drop in those few seconds. The generator recharges the battery. K7L (talk) 01:56, 30 December 2013 (UTC)
thread_title:  48vdc battery back up 

message: This is very US centric
July 2013
SimonMWatts (talk) 13:35, 22 July 2013 (UTC)
replies: text: I've removed it. Wikipedia is not a directory listing and it adds nothing of value to the article. K7L (talk) 23:51, 29 December 2013 (UTC)
thread_title:  Carrier list 

message: The second sentence in the lead needs to be clarified for the average reader. POTS remained the "standard service offering" for most customers, especially most residential customers, long past 1988. While cell/mobile phone service started to take off in the 1990's and really gained traction in the 2000's, POTS was still the standard for residential phone service till sometime in the 2000's/2010's. VOIP technologies did not really gain any traction until 2000's. So unless "standard service offering" has some specialized meaning in Tel-co jargon, in which case that needs to explained, I would rephrase the sentence to clarify that we are not suggesting ISDN, VOIP, and Cell service suddenly leapfrogged POTS immediately upon their introduction. If by "standard service offering" we mean only service offering (for landline voice calls from the Tel-Co) then state so more clearly. --Notcharliechaplin (talk) 15:07, 21 August 2018 (UTC)
thread_title:  Lead issue with statement "POTS was the standard service offering from telephone companies from 1876 until 1988 when the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) was introduced..." 

message: Looking at the first reference in the article, it describes POTS as "Publicly Offered Telephone Service (Plain Old Telephone Service)" (page 19). Doesn't that mean that the more correct meaning is Publicly Offered Telephone Service? My wild guess(!) is that this was the original meaning, and it changed into Plain Old Telephone Service because this is easier to remember and triggers more emotions? Shouldn't at least Publicly Offered Telephone Services be mentioned in the article? Justalittlebitmore (talk) 08:44, 8 March 2021 (UTC)
thread_title:  Doesn't it stand for Publicly Offered Telephone Service?