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
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
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
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
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
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
7 votes
2 answers
700 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
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