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== Functionality == | == Functionality == | ||
When picking up the handset of the payphone, the phone will show a boot screen | [[File:Payphone boot.jpg|thumb|The boot screen of the [[Telstra Smart Payphone]]]]When picking up the handset of the payphone, the phone will show a boot screen. | ||
Shortly after, you will reach the main screen. Here you can enter the phone number to call, or press OK to enter a menu for other functions. | |||
=== Calling === | |||
From the main screen, dial the number to call with the keypad. The phone will immediately show an error message if you dial a prefix that it cannot call, such as 05 (an unallocated range for mobile numbers) or 19 (premium rate numbers). | |||
Once you have finished dialling, the phone will attempt to place the call after a few seconds. The screen will show "FREE CALL" once this has occurred. | |||
While the call is connected, you can still dial as on any other phone to respond to interactive voice prompts or menus. These numbers will show on the screen. | |||
Once the call is concluded, the screen does not change, although you will hear the disconnect tone as normal. You can now replace the handset to put the phone back to standby or press the FOLLOW ON button under the handset to make another call. | |||
=== SMS === | |||
From the OK menu, you can press 1 to write your own message to send or 2 to choose from a list of pre-written messages. | |||
== History == | == History == | ||
| Line 38: | Line 49: | ||
=== Phonecard-only Smart Payphone === | === Phonecard-only Smart Payphone === | ||
A less common version is the '''Phonecard-only''' or card-only Smart Payphone. These units do not have a usable coin mechanism and rely on the Telstra Phonecard or a compatible calling card for charged destinations | A less common version is the '''Phonecard-only''' or card-only Smart Payphone. These units do not have a usable coin mechanism and rely on the Telstra Phonecard or a compatible calling card for charged destinations.<ref name="telstra-payphones" /> | ||
=== Coin and Phonecard Smart Payphone === | === Coin and Phonecard Smart Payphone === | ||
| Line 48: | Line 59: | ||
=== TTY Smart Payphone === | === TTY Smart Payphone === | ||
Some Telstra payphones were modified with a '''TTY''' | Some Telstra payphones were modified with a '''[[TTY]]''' (teletypewriter) facility for people who are deaf or have a communication impairment. Telstra states that around 100 payphones have been modified to include a TTY facility. TTY-equipped payphones can be found through Telstra's Payphone Locator by searching for the ''Teletypewriter (TTY)'' feature.<ref name="telstra-tty">''TTY Payphones'', Telstra Consumer Advice, [https://www.telstra.com.au/consumer-advice/payphones/tty-payphones](https://www.telstra.com.au/consumer-advice/payphones/tty-payphones). Accessed 3 May 2026.</ref> | ||
TTY units are visually distinct and are of particular interest to Payphonetag players. The TTY keyboard used with Telstra payphones is an '''Ultratec Pay Phone TDD''' keyboard. The keyboard slides out when TTY tones are detected over the phone line. Many units appear to have seen little regular use in recent years, so players should not assume that the TTY attachment is working unless tested. | TTY units are visually distinct and are of particular interest to Payphonetag players. The TTY keyboard used with Telstra payphones is an '''Ultratec Pay Phone TDD''' keyboard. The keyboard slides out when TTY tones are detected over the phone line. Many units appear to have seen little regular use in recent years, so players should not assume that the TTY attachment is working unless tested. | ||
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=== Wi-Fi-enabled cabinets === | === Wi-Fi-enabled cabinets === | ||
Some Smart Payphones are installed in | Some Smart Payphones are installed in [[Cabinet|cabinets]] or surrounds that also provide free Telstra Wi-Fi. Telstra says users can connect by selecting the ''Free Telstra Wi-Fi'' network and accepting the portal terms.<ref name="telstra-wifi" /> Wi-Fi-enabled sites may have additional branding, antennas or cabinet modifications. | ||
Field observations suggest that Telstra Air / Free Telstra Wi-Fi-enabled payphones often use conventional domestic-style Telstra Smart Modems installed within the booth's roof ''hat'' or inside a Telstra Air cube enclosure mounted above the booth roof. | Field observations suggest that Telstra Air / Free Telstra Wi-Fi-enabled payphones often use conventional domestic-style Telstra Smart Modems installed within the booth's roof ''hat'' or inside a Telstra Air cube enclosure mounted above the booth roof. | ||
-- Under construction -- | |||
=== Contact oxidation === | === Contact oxidation === | ||
Because Phonecard slots have seen little use for many years, the contacts in the reader may be dirty or oxidised. If a known-good Phonecard is not read immediately, gently insert and remove the card several times. Do not force the card, insert foreign objects, spray cleaners into the slot, or damage the phone. | Because Phonecard slots have seen little use for many years, the contacts in the reader may be dirty or oxidised. If a known-good Phonecard is not read immediately, gently insert and remove the card several times. Do not force the card, insert foreign objects, spray cleaners into the slot, or damage the phone. | ||
== Call charges and tariffs == | == Call charges and tariffs == | ||
| Line 186: | Line 167: | ||
The mobile phone volume must be adjusted carefully. If it is too loud, the tones may distort and fail to decode; if it is too quiet, the payphone microphone may not pick them up reliably. Hold the mobile phone speaker near the payphone mouthpiece and listen through the payphone earpiece while adjusting the volume to find the cleanest level. | The mobile phone volume must be adjusted carefully. If it is too loud, the tones may distort and fail to decode; if it is too quiet, the payphone microphone may not pick them up reliably. Hold the mobile phone speaker near the payphone mouthpiece and listen through the payphone earpiece while adjusting the volume to find the cleanest level. | ||
=== Testing the Phonecard slot === | === Testing the Phonecard slot === | ||
A working Phonecard should cause the payphone to display the remaining stored value when inserted.<ref name="phonecard-terms" /> If it does not: | A working Phonecard should cause the payphone to display the remaining stored value when inserted.<ref name="phonecard-terms">''Telstra Phonecard: Things you need to know'', Telstra, [https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf](https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf). Accessed 3 May 2026.</ref> If it does not: | ||
* check that the card is inserted the correct way around; | * check that the card is inserted the correct way around; | ||
Revision as of 06:52, 24 May 2026

The Telstra Smart Payphone is the current standard public telephone used by Telstra in Australia. It replaced earlier Telecom Australia and Telstra public payphone types and is the model most commonly encountered by Payphonetag players.
Telstra describes the Smart Payphone as its latest public payphone. Published features include SMS sending to Australian mobiles, a large back-lit display showing the number dialled and remaining credit, visual or audible low-credit and end-of-call warnings, a hearing-aid coupler, four-step volume control, and redial.[1]
Although still generally called a payphone, ordinary domestic use of Telstra public phones is now free. Telstra states that standard national and mobile calls are free from all Telstra payphones, and that from 8 October 2021 payphones stopped accepting coins. Calls to international and other charged destinations require a Telstra Phonecard or other third-party calling card.[2]
Functionality

When picking up the handset of the payphone, the phone will show a boot screen.
Shortly after, you will reach the main screen. Here you can enter the phone number to call, or press OK to enter a menu for other functions.
Calling
From the main screen, dial the number to call with the keypad. The phone will immediately show an error message if you dial a prefix that it cannot call, such as 05 (an unallocated range for mobile numbers) or 19 (premium rate numbers).
Once you have finished dialling, the phone will attempt to place the call after a few seconds. The screen will show "FREE CALL" once this has occurred.
While the call is connected, you can still dial as on any other phone to respond to interactive voice prompts or menus. These numbers will show on the screen.
Once the call is concluded, the screen does not change, although you will hear the disconnect tone as normal. You can now replace the handset to put the phone back to standby or press the FOLLOW ON button under the handset to make another call.
SMS
From the OK menu, you can press 1 to write your own message to send or 2 to choose from a list of pre-written messages.
History
Public telephones have been part of the Australian telephone network since the 1880s. The Telstra Smart Payphone belongs to the late-1990s generation of electronic public telephones designed around smartcard payment, display-based prompting, programmable tariffs and automatic fault reporting.
Contemporary press coverage in The Sydney Morning Herald shows Telstra's smart-card public telephone technology was being covered publicly during the late-1990s rollout period.[3]
Collector sources identify the Australian Smart Payphone as part of the Amper-developed MPP or Multi Purpose Payphone platform, with early units made in Spain and adapted for Australian weather and vandal-resistance.[4] The model is commonly said to have been introduced in 1997 to replace the CT3 series, with early deployments in Adelaide, Perth, Brisbane and Sydney.[4] The current manufacturer appears to be Infopyme Comunicaciones, a Spanish public-telephony manufacturer that describes itself as designing, manufacturing, assembling and repairing public telephones and spare parts for operators around the world.[5]
The Telstra Smart Payphone appears to be a Telstra-specific variant of Infopyme's TMI public-payphone platform, or of the same Amper/Siemens-Elasa/Infopyme product lineage. This identification is based on manufacturer lineage and visual/collector comparison rather than a Telstra-published model sheet, so it should be treated as probable rather than formally confirmed.
Early units were reportedly modified or retrofitted after problems with durability, weather exposure and vandalism. Later Australian examples have heavier stainless-steel casing and improved coin-security hardware on coin-capable variants.[4]
At some point in the mid-2000s, the Smart Payphone firmware and/or service platform was updated to allow SMS sending. Telstra's current payphone terms state that some public payphones can send SMS messages to compatible Australian mobile and fixed services, although payphones cannot receive SMS replies.[6]
In 2019 Telstra enabled incoming calls on many public payphones. Telstra later stated that publicly accessible payphones could receive incoming telephone calls, and Telstra's current public-payphone terms state that some payphones allow incoming calls at no charge.[7][6]
In August 2021 Telstra made local calls, national calls to standard fixed-line numbers and calls to standard Australian mobiles free from public payphones.[8] Coin acceptance ended from 8 October 2021.[2]
With the rollout of the NBN and the progressive decommissioning of copper-based POTS services, many Smart Payphones in metropolitan areas have been converted to use Telstra's cellular network rather than a traditional copper telephone line. In the field, these can often be identified by the telephone number shown on the payphone's [[cabinet]] label: cellular-connected payphones commonly have numbers beginning with 04 rather than a fixed-line area code.
From 2022, Telstra began converting enabled payphones into free Wi-Fi hotspots. Telstra stated that free Wi-Fi became available at selected enabled payphones from 25 August 2022, and that around 3,000 Wi-Fi-enabled payphones had been upgraded by 2023.[9]
Variants
Phonecard-only Smart Payphone
A less common version is the Phonecard-only or card-only Smart Payphone. These units do not have a usable coin mechanism and rely on the Telstra Phonecard or a compatible calling card for charged destinations.[2]
Coin and Phonecard Smart Payphone
The most common Smart Payphone variant still encountered in the field is the coin and Phonecard model. These units were originally fitted with both a coin mechanism and a Telstra Phonecard slot. Collector sources state that coin-capable units accepted Australian 5c, 10c, 20c, 50c, $1 and $2 coins.[4]
After Telstra made standard Australian national and mobile calls free in 2021, coin acceptance was later disabled across Telstra public payphones. Telstra states that payphones stopped accepting coins from 8 October 2021.[2] As a result, many coin/Phonecard Smart Payphones still physically have a coin slot, coin return and related hardware, but the coin mechanism should be treated as disabled rather than usable. The Phonecard slot may still be usable for charged destinations and Phonecard-specific functions.
TTY Smart Payphone
Some Telstra payphones were modified with a TTY (teletypewriter) facility for people who are deaf or have a communication impairment. Telstra states that around 100 payphones have been modified to include a TTY facility. TTY-equipped payphones can be found through Telstra's Payphone Locator by searching for the Teletypewriter (TTY) feature.[10]
TTY units are visually distinct and are of particular interest to Payphonetag players. The TTY keyboard used with Telstra payphones is an Ultratec Pay Phone TDD keyboard. The keyboard slides out when TTY tones are detected over the phone line. Many units appear to have seen little regular use in recent years, so players should not assume that the TTY attachment is working unless tested.
TTY payphones that have been converted to use Telstra's 4G/cellular network, usually identifiable by an 04 number on the [[cabinet]] label, are currently reported not to work correctly with TTY. Telstra is aware of the issue and has stated that it is working on a solution.
Wi-Fi-enabled cabinets
Some Smart Payphones are installed in cabinets or surrounds that also provide free Telstra Wi-Fi. Telstra says users can connect by selecting the Free Telstra Wi-Fi network and accepting the portal terms.[9] Wi-Fi-enabled sites may have additional branding, antennas or cabinet modifications.
Field observations suggest that Telstra Air / Free Telstra Wi-Fi-enabled payphones often use conventional domestic-style Telstra Smart Modems installed within the booth's roof hat or inside a Telstra Air cube enclosure mounted above the booth roof.
-- Under construction --
Contact oxidation
Because Phonecard slots have seen little use for many years, the contacts in the reader may be dirty or oxidised. If a known-good Phonecard is not read immediately, gently insert and remove the card several times. Do not force the card, insert foreign objects, spray cleaners into the slot, or damage the phone.
Call charges and tariffs
For ordinary Payphonetag use, standard Australian fixed-line and mobile calls should be treated as free, consistent with Telstra's current consumer advice.[2] Since Telstra stopped accepting coins in 2021, remaining chargeable calls require a Telstra Phonecard or other supported calling card.[2]
The current practical charging position is:
| Call type | Current status |
|---|---|
| Standard Australian fixed-line calls, including local and national landline calls | Free |
| Standard Australian mobile calls | Free |
| Domestic satellite and special mobile satellite services | Chargeable; Phonecard or supported calling card required |
| International calls | Chargeable; Phonecard or supported calling card required |
| Domestic SMS from a public payphone, where supported | Free |
Telstra's public-payphone customer terms still publish tariff details for chargeable services, including domestic satellite calls and international calls.[6] International calls are charged by destination in seconds per 50c. Examples from Telstra's current table include 600 seconds per 50c to the United States, Canada, Malaysia, Singapore, Hong Kong, India, Thailand, Bangladesh and South Korea; 120 seconds per 50c to the United Kingdom, France, Greece, Japan, Indonesia and the Philippines; and 60 seconds per 50c to New Zealand, Germany, Italy and Ireland.[6]
Telstra's terms also state that some public payphones can send an SMS of up to 136 characters to a compatible Australian mobile or fixed service, but that payphones cannot receive or reply to SMS, cannot send SMS to 13x, 13xx, 180x or international services, and that SMS from a payphone is not suitable for emergencies.[6]
Payphonetag tips
Reporting faults
The official Telstra payphone fault line is 180 22 44. Telstra states that this is a free call from Telstra payphones and operates 24/7. Useful details include the location, the payphone number or cabinet ID, a description of the fault, and details of any physical damage.[11]
In practice, Payphonetag players have found that the quickest way to submit ordinary non-urgent fault reports is usually Snap Send Solve. Telstra's damaged-equipment page directs non-urgent damage reports through Snap Send Solve, and Snap Send Solve says it can send Telstra equipment reports directly to Telstra.[12][13]
As of current Payphonetag field reports, the best Snap Send Solve category to use is usually Telstra – Phonebox Graffiti, even if the problem is not graffiti. This appears to route the report to a Telstra staff member or Telstra workflow where the appropriate payphone fault can be logged. Include a clear description such as handset missing, no dial tone, screen blank, keypad not responding, card reader not reading cards, TTY not working, or line noisy.
For faults that create an immediate safety risk, such as exposed wiring, overhead cable damage, injury or damage to property, follow Telstra's urgent-damage advice instead: call 13 22 03 and say report damages.[12]
Incoming calls and caller ID
Almost all Telstra Smart Payphones can receive incoming calls. The payphone will usually ring and can be answered by lifting the handset. Payphones also normally display outgoing caller ID when making a call, which is useful for confirming the number assigned to a payphone and matching it to its cabinet label.
There are exceptions at sensitive locations, such as mental health crisis wards, prisons, rehabilitation facilities and similar controlled environments. At these sites, outgoing caller ID may be blocked and appear as a private number. Incoming calls may still wake the phone, but the display may not show an incoming-call message. If the handset is lifted, the phone may display SERVICE NOT AVAILABLE - HANG UP rather than connecting the incoming call.
A notable exception is outgoing SMS. Even where outgoing voice caller ID appears to be blocked, outgoing SMS messages may still display the payphone's caller ID.
Follow On button
The Follow On button was originally used to allow remaining coin credit to be used for an additional call without the user having to insert more coins. Since coins are no longer accepted and standard Australian calls are free, the button has little practical purpose for payment. It can still be useful for quickly starting another call without waiting for the payphone to go through its full reset cycle.
Using a TTY payphone with Payphonetag
A TTY-equipped Telstra Smart Payphone can be triggered by calling the Payphonetag number. After entering the required PIN, Payphonetag sends the modem/TTY tones needed to activate the Ultratec Pay Phone TDD keyboard. Once the keyboard slides out, type a message using the TTY keyboard. The message will be decoded and displayed in the #tty channel of the Payphonetag Discord.
This is useful for testing whether the TTY attachment is still functional. If the keyboard does not slide out, the TTY unit, phone line, handset path, detection circuit or Payphonetag-side call path may be faulty. If the payphone has an 04 number on its [[cabinet]] label, it may be one of the 4G-converted TTY payphones currently affected by Telstra's known TTY issue.
Dialling when the keypad is not working properly
If the numeric keypad is damaged but the card key and card reader still work, a Telstra Phonecard can sometimes be used to autodial a stored number.
- Find another Smart Payphone with a working keypad and working Phonecard reader.
- Insert the Telstra Phonecard.
- Press OK to enter the menu.
- Select Option 3 for the Phonecard autodial/programming function.
- Program the target number into the Phonecard.
- At the payphone with the damaged keypad, insert the programmed Phonecard.
- Press the card key to autodial the stored number. The card key is the first key from the top on the left-most row of the keypad.
This is useful where the keypad has failed or certain digits do not register. It will not help if the hookswitch, handset, line, display, card reader or card key is faulty.
Entering a Payphonetag PIN with a tone dialling app
If the payphone keypad is partly or completely broken, it may still be possible to call Payphonetag and enter a PIN using DTMF tones generated by a mobile phone.
First, place the call to 07 LOADTALK — 07 5623 8255 — using a Phonecard autodial entry, or by dialling normally if the broken key is not needed for the Payphonetag number. Once the call is connected, use a tone dialling app on a mobile phone to play the PIN digits into the payphone handset microphone.
The mobile phone volume must be adjusted carefully. If it is too loud, the tones may distort and fail to decode; if it is too quiet, the payphone microphone may not pick them up reliably. Hold the mobile phone speaker near the payphone mouthpiece and listen through the payphone earpiece while adjusting the volume to find the cleanest level.
Testing the Phonecard slot
A working Phonecard should cause the payphone to display the remaining stored value when inserted.[14] If it does not:
- check that the card is inserted the correct way around;
- try several gentle insertion/removal cycles;
- try the same card in another payphone;
- try another known-good Phonecard if available;
- remember that the card slot, card reader or payphone line may be faulty.
Related payphones in other countries
The Telstra Smart Payphone was not a completely unique Australian concept. Similar or related Amper/Siemens-Elasa/Infopyme public telephones appeared in several other countries, sometimes with different housings, tariffing and operator-specific software.
Germany
Germany had TELE-RUF Smart Payphones, a privately operated late-1990s/early-2000s smart-payphone system. Collector documentation identifies the TELE-RUF units as using hardware based on the Amper-developed MPP platform also used in Australia's Telstra CT-10/Smart Payphone.[15]
These German phones advertised cheap calls and mobile-era digital services such as SMS, ringtone downloads and digital content delivery.[15]
Croatia
Croatia has used public payphones operated by Hrvatski Telekom. Some older Croatian card payphones have been visually identified by collectors as being part of the same or a closely related Siemens/Amper platform family, but this should be treated cautiously unless supported by a manufacturer plate or primary source.
Hrvatski Telekom later modernised some public payphone sites into digital smart-phone booths. In 2017 Hrvatski Telekom and Vendotel installed ten smart payphones in Zadar with free Wi-Fi, ticketing, voucher sales and other services.[16] In 2018 Hrvatski Telekom and Go2Digital announced the replacement of existing public payphones with digital payphones offering Wi-Fi, wireless charging, sensors, navigation information, digital advertising and an SOS key.[17]
Cuba
Cuba's ETECSA public telephone network has used several public telephone technologies, including Siemens-Elasa and Amper/Siemens-Elasa equipment. Cuban service-quality material has listed public-telephone technologies including Siemens Elasa and Amper coin and card telephone equipment.
Cuban public phones remained important well into the smartphone era because public-phone calls were much cheaper than mobile calls. A 2017 report stated that Cuba had 59,818 public phones at the end of the previous year, including 8,588 coin-operated phones.[18]
Russia
Russia, particularly Moscow's MGTS public-payphone network, used Amper and Siemens-Elasa equipment during the transition from token-operated phones to card and coin-card public phones. Russian metrology-register material lists Amper-Siemens-Elasa card-payphone tariff equipment, including TPM-PC/S and TPM-MM/P models, manufactured in Spain.[19]
Moscow also trialled Siemens Elasa internet payphones in 2003, with reports stating that MGTS planned to install a small trial batch able to provide voice calls, internet access, email, text messages and multimedia messages.[20]
References
- ↑ Telstra Smart Payphone, Telstra Consumer Advice, [1](https://www.telstra.com.au/consumer-advice/payphones/smart-payphone). Accessed 3 May 2026.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Payphone services, Telstra Consumer Advice, [2](https://www.telstra.com.au/consumer-advice/payphones). Accessed 3 May 2026.
- ↑ Using our new Smart Payphones and Smart Phonecards is easy, Telstra advertisement, The Sydney Morning Herald, Fairfax Media clipping via Newspapers.com, [3](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.
- ↑ 4.0 4.1 4.2 4.3 Telstra Smart Payphone (MPP X1), Pay phone Story, 28 May 2025, [4](https://payphonestory.com/2025/05/28/ct-10-telstra-smart-payphone/). Accessed 3 May 2026.
- ↑ Manufacture, assembly and repair of public telephones, Infopyme Comunicaciones, [5](https://www.infopyme.com/en/company/public-payphones-manufacturer). Accessed 3 May 2026.
- ↑ 6.0 6.1 6.2 6.3 6.4 Public Payphones Section: Our Customer Terms, Telstra, last changed 9 November 2023, [6](https://www.telstra.com.au/content/dam/tcom/personal/consumer-advice/pdf/pubpayphones.pdf). Accessed 3 May 2026.
- ↑ Payphones deliver vital community service, Telstra, 11 October 2019, [7](https://www.telstra.com.au/aboutus/media/media-releases/Payphones-deliver-vital-community-service). Accessed 3 May 2026.
- ↑ Why we’re making payphones free for calls around Australia, Telstra Exchange, 29 September 2022, [8](https://www.telstra.com.au/exchange/payphones-free-for-calls-australia). Accessed 3 May 2026.
- ↑ 9.0 9.1 Free Wi-Fi is now available to anyone across selected Telstra payphones, Telstra Exchange, 7 November 2023, [9](https://www.telstra.com.au/exchange/free-wi-fi-is-now-available-to-anyone-across-selected-telstra-pa). Accessed 3 May 2026.
- ↑ TTY Payphones, Telstra Consumer Advice, [10](https://www.telstra.com.au/consumer-advice/payphones/tty-payphones). Accessed 3 May 2026.
- ↑ Reporting faults, Telstra Consumer Advice, [11](https://www.telstra.com.au/consumer-advice/payphones/reporting-faults). Accessed 3 May 2026.
- ↑ 12.0 12.1 Report damages to Telstra equipment, Telstra Consumer Advice, [12](https://www.telstra.com.au/consumer-advice/digging-construction/report-damages). Accessed 3 May 2026.
- ↑ Report Damaged Telstra Equipment, Snap Send Solve, 15 April 2026, [13](https://www.snapsendsolve.com/report/damaged-telstra-equipment). Accessed 3 May 2026.
- ↑ Telstra Phonecard: Things you need to know, Telstra, [14](https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf). Accessed 3 May 2026.
- ↑ 15.0 15.1 German Phone Booth – TELE-RUF Smart Payphones, Pay phone Story, 16 April 2026, [15](https://payphonestory.com/2026/04/16/german-phone-booth-tele-ruf-smart-payphones/). Accessed 3 May 2026.
- ↑ Hrvatski Telekom with its partner Vendotel installed in Zadar first smart phone booths in Croatia, Hrvatski Telekom, 2 May 2017, [16](https://www.t.ht.hr/en/Press/press-releases/3626/Hrvatski-Telekom-with-its-partner-Vendotel-installed-in-Zadar-first-smart-phone-booths-in-Croatia.html). Accessed 3 May 2026.
- ↑ Hrvatski Telekom and Go2Digital start modernization of public pay phones, Hrvatski Telekom, 12 June 2018, [17](https://www.t.ht.hr/en/Press/press-releases/4186/Hrvatski-Telekom-and-Go2Digital-start-modernization-of-public-pay-phones.html). Accessed 3 May 2026.
- ↑ Cuba's Public Phones Persist in the Smartphone Era, Translating Cuba / 14ymedio, 6 September 2017, [18](https://translatingcuba.com/cubas-public-phones-persist-in-the-smartphone-era/). Accessed 3 May 2026.
- ↑ Государственный реестр средств измерений: TPM-PC/S and TPM-MM/P, Государственный реестр средств измерений, [19](https://info.metrologu.ru/grsi/grsi.html?curPos=15340). Accessed 3 May 2026. Russian-language source.
- ↑ В Москве установлен первый интернет-таксофон, NEWSru.com, 25 December 2003, [20](https://www.newsru.com/russia/25dec2003/internet.html). Accessed 3 May 2026. Russian-language source.