Questions tagged [modem]
Discussion of retrocomputing modems.
34 questions
7 votes
0 answers
190 views
AppleTalk over PPP on Cisco IOS - Encapsulation Failures in One Direction
Problem Statement I am trying to run AppleTalk over PPP on a Cisco 3845 router accepting incoming PPP connections so that old Macintosh computers can connect via dialup to the rest of my AppleTalk ...
- 91
11 votes
2 answers
634 views
A kind of modem that let you make voice calls with a simultaneous data connection: what was it called?
I recall in the early 90s a type of modem (for analog phone lines) that let you conduct a voice call while maintaining a data connection. It sent bursts of data during the natural silences in ...
- 130
3 votes
3 answers
827 views
I want to use the line jack of a dial-up modem
Typically, an ISA dial-up modem card has two RJ11 jacks: one labeled Telco and the other labeled Line or Phone, intended to be connected to a telephone. Normally, when issuing commands to the modem to ...
- 791
4 votes
1 answer
169 views
What is the power adapter voltage and polarity for an Avatex 1200 modem?
My very first modem was an Avatex 1200 connected to my trusty C64. Unfortunately, the power adapter has long since been, let's say, disassociated from the hardware. I probably still have it, but the ...
- 11k
20 votes
3 answers
3k views
What exactly were those large orange chips on the Hayes Micromodem II interface card?
I've had a Hayes Micromodem II for the Apple ][ a very, very long time. I've seen a lot of interface cards over the years since then and have never seen anything quite like it: there are giant orange, ...
- 19.1k
5 votes
4 answers
744 views
Which home computer first included a printer and modem port as standard?
As home computers rapidly gained in popularity in the early 1980s, third-party peripheral manufacturers also began selling peripherals. For those users wanting to do "serious work", the ...
- 62.1k
5 votes
2 answers
905 views
Does the interface PBX phones plug into limit modem speed? [closed]
Many hotel etc phones plug into a digital PBX, often with a non-standard interface. Does the interface PBX phones plug into limit modem speed to below 56k?
- 471
17 votes
4 answers
2k views
Why was Wireplay "faster and more reliable" than dial-up Internet, since they both used the same hardware?
In 1997, there was this service called Wireplay in the UK. Instead of using the Internet, you used it by directly phoning their servers with your modem from your PC, and the point of this was that it ...
- 171
9 votes
4 answers
2k views
Why Kansas City Standard (KCS/CUTS) differs from Bell 103/202/212 modem protocol?
While both were data transfer protocols serving streams at 300/1200 baud, why did they choose different frequencies, marks, modulation, and anything else? I understand that they serve different ...
- 3,834
6 votes
3 answers
1k views
Is there a softmodem driver package for Linux?
I'd like to run an old-school BBS that can be dialed into over a real phone line. Unfortunately, I don't currently have the necessary hardware to do so. I had the idea of purchasing a VPS and then ...
- 161
11 votes
2 answers
1k views
Why did the Bell 103 modem specification use 1070Hz, 1270Hz, 2025Hz and 2225Hz?
The Bell 103 modem spec gives the following frequencies to use: Transmit Side: 1070Hz (space) and 1270Hz (mark) Receive Side: 2025Hz (space) and 2225Hz (mark) Why were these specific frequencies ...
- 210
4 votes
4 answers
1k views
Using a GSM (2G) cellphone as a modem to send code
I am quite a newbie to retrocomputing, and I don't know if such a question should be asked here. But I hope maybe some of you could help me. I started reflecting on ways to send data without the ...
- 41
7 votes
2 answers
701 views
What is the easiest way to get an Amiga online?
I'm working on my ultimate CDTV setup, few hiccups along the way with CDROM access on TF536, but we will cross this bridge. As of right now I'm only missing and internet access, before I can finally ...
- 4,262
34 votes
6 answers
6k views
How can I construct a dial-up network in my home, purely for the kicks?
All the technology in my house is modern, but I want to build a dialup network that I can use to produce sounds from Bell 101/103 (if I can find the proper softmodem) to V.92bis. I honestly don't know ...
- 441
26 votes
7 answers
5k views
Why were "data modems" so much more expensive compared to "fax modems" back in the day?
In 1997, my uncle visited and gave me a "fax modem" which he installed on our 486 PC and then managed to transfer over a fax document from a real fax in his home to our computer, running ...
B. Yath