5 ms·

I quickly went from "what a fun weekend project" to "where on Earth would I find two landlines to test with?"

by bitkarma 8y ago

simook 8y ago
just need a Landline-as-a-service :)
- icedchai 8y ago
  It already exists and is called a VOIP provider! You won't get very high bandwidth but you can generally get 9600 baud or so.
  - jf 8y ago
    This came up every few months when I was at Twilio (2012-2014) - primarily regarding supporting faxes. From what I remember from the folks who knew SIP really well, the issue was mainly that there's too much variability in terms of latency and the modulation/demodulation of the analog signals that modems use.
    - lozaning 8y ago
      100% of the companies that I installed LG IPECS systems into back in the day also became e-fax customers. By the time you've got a dedicated channel for the fax machine (missing an inbound PO delivered via fax because the sales team is hitting the phones hard doesn't fly anywhere) and are paying an additional monthly fee for another DID the cost is usually a wash anyways. It's money exceptionally well spent to not have to worry about G.729 jitter and the nightmare that is analog>digital>analog>digital and back.
mbreese 8y ago
The article didn’t even use them. They hacked a single voip ata with two ports and connected those together. That’s a pretty elegant (albeit impractical) solution to that rather unique problem.
- dag11 8y ago
  Internet over phone over internet :D
reaperducer 8y ago
I quickly went from "what a fun weekend project" to "where on Earth would I find two landlines to test with?" Ask one of the 151,287,292 people in the United States who have a landline.
jolmg 8y ago
Aren't most ISPs worldwide phone service providers? I get a landline forcibly packaged with my internet service. I don't even have a landline phone.
- jethro_tell 8y ago
  They are usually VoIP phone providers, they are just running a phone connection over the data you already paid for. Modems and fax machines are pretty sensitive, and pushing that sound over a packet switched network with UDP instead of a circuit switched network leaves a lot to be desired. So there are some places that still support old copper lines, but in many places, if they have to run a new line, they'll run a coax or fiber to your house and give you a plug in off of that. It's basically not an offering in many places now.
  - tracker1 8y ago
    It may be different now, but I remember back in the early 00's being unable to get better than a 14.4 connection over voip... That's all the provider would guarantee and was intended for fax use.

I quickly went from "what a fun weekend project" to "where on Earth would I find two landlines to test with?"

simook 8y ago

just need a Landline-as-a-service :)

icedchai 8y ago
It already exists and is called a VOIP provider! You won't get very high bandwidth but you can generally get 9600 baud or so.
- jf 8y ago
  This came up every few months when I was at Twilio (2012-2014) - primarily regarding supporting faxes. From what I remember from the folks who knew SIP really well, the issue was mainly that there's too much variability in terms of latency and the modulation/demodulation of the analog signals that modems use.
  - lozaning 8y ago
    100% of the companies that I installed LG IPECS systems into back in the day also became e-fax customers. By the time you've got a dedicated channel for the fax machine (missing an inbound PO delivered via fax because the sales team is hitting the phones hard doesn't fly anywhere) and are paying an additional monthly fee for another DID the cost is usually a wash anyways. It's money exceptionally well spent to not have to worry about G.729 jitter and the nightmare that is analog>digital>analog>digital and back.

mbreese 8y ago

The article didn’t even use them. They hacked a single voip ata with two ports and connected those together. That’s a pretty elegant (albeit impractical) solution to that rather unique problem.

dag11 8y ago
Internet over phone over internet :D

reaperducer 8y ago

I quickly went from "what a fun weekend project" to "where on Earth would I find two landlines to test with?" Ask one of the 151,287,292 people in the United States who have a landline.

jolmg 8y ago

Aren't most ISPs worldwide phone service providers? I get a landline forcibly packaged with my internet service. I don't even have a landline phone.

jethro_tell 8y ago
They are usually VoIP phone providers, they are just running a phone connection over the data you already paid for. Modems and fax machines are pretty sensitive, and pushing that sound over a packet switched network with UDP instead of a circuit switched network leaves a lot to be desired. So there are some places that still support old copper lines, but in many places, if they have to run a new line, they'll run a coax or fiber to your house and give you a plug in off of that. It's basically not an offering in many places now.
- tracker1 8y ago
  It may be different now, but I remember back in the early 00's being unable to get better than a 14.4 connection over voip... That's all the provider would guarantee and was intended for fax use.