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The kind of ATM I see at gas stations usually seem to involve a legacy ethernet cable of some sort (I've been told it's probably RJ12) and/or a small antenna ma

by dylz 6y ago

The kind of ATM I see at gas stations usually seem to involve a legacy ethernet cable of some sort (I've been told it's probably RJ12) and/or a small antenna magnet-mounted to the top of it. Not sure if they both serve the same communications purpose. The few times I've used one they also take a ridiculous amount of time to connect/return anything, on the order of 30s-1m.

jedberg 6y ago
Depending on the age it's either a Cat-3 cable or just a telephone cable in a round shield. It could also just be a serial cable.
bradtheappguy 6y ago
This comment makes me feel old. The 2/3 sized cat5 jack is actually an RJ11 - what we used to call a 'phone jack'
- kfarr 6y ago
  Lol yeah "legacy ethernet cable" cracked me up, it's a phone jack :)
- ProZsolt 6y ago
  RJ12 is a thing: https://en.wikipedia.org/wiki/Registered_jack#RJ12 https://en.wikipedia.org/wiki/Registered_jack#RJ12 The jacks official name for the jack is Modular connector[1]. 6P6C for RJ14, 6P2C for RJ11 and 8P8C for RJ45 (what you described as cat5 jack) [1]:https://en.wikipedia.org/wiki/Modular_connector https://en.wikipedia.org/wiki/Modular_connector
ericbarrett 6y ago
Many of these even now remain on dial-up, so they just have a modem and the cable is a phone jack. If you have a favorite bodega ATM that always takes 15 seconds to respond after you type your PIN, it's probably dialing. Newer ATMs almost certainly use wireless modems, if they aren't just connected to the Internet. Fun fact, the modems still negotiate at 2400 or 9600 baud, because the extended negotiation times of higher-speed protocols more than negate time saved in transferring the small payload. They even make gateways to bridge old dial-up ATMs to IP: https://atmpartmart.com/wireless-atm-modems/systech-box-ipg-7010-atm-modem https://atmpartmart.com/wireless-atm-modems/systech-box-ipg-...

by dylz 6y ago

jedberg 6y ago

Depending on the age it's either a Cat-3 cable or just a telephone cable in a round shield. It could also just be a serial cable.

bradtheappguy 6y ago

This comment makes me feel old. The 2/3 sized cat5 jack is actually an RJ11 - what we used to call a 'phone jack'

kfarr 6y ago
Lol yeah "legacy ethernet cable" cracked me up, it's a phone jack :)
ProZsolt 6y ago
RJ12 is a thing: https://en.wikipedia.org/wiki/Registered_jack#RJ12 https://en.wikipedia.org/wiki/Registered_jack#RJ12 The jacks official name for the jack is Modular connector[1]. 6P6C for RJ14, 6P2C for RJ11 and 8P8C for RJ45 (what you described as cat5 jack) [1]:https://en.wikipedia.org/wiki/Modular_connector https://en.wikipedia.org/wiki/Modular_connector

ericbarrett 6y ago

Many of these even now remain on dial-up, so they just have a modem and the cable is a phone jack. If you have a favorite bodega ATM that always takes 15 seconds to respond after you type your PIN, it's probably dialing. Newer ATMs almost certainly use wireless modems, if they aren't just connected to the Internet. Fun fact, the modems still negotiate at 2400 or 9600 baud, because the extended negotiation times of higher-speed protocols more than negate time saved in transferring the small payload. They even make gateways to bridge old dial-up ATMs to IP: https://atmpartmart.com/wireless-atm-modems/systech-box-ipg-7010-atm-modem https://atmpartmart.com/wireless-atm-modems/systech-box-ipg-...