VivienM wrote on 2024-08-18, 04:05:56K required the ISP to be getting digital circuits (23-channel PRIs) from the phone company. Those went into terminal servers t […]
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BitWrangler wrote on 2024-08-18, 03:10:
Reminder that 56k wasn't 56k until you connected to a special ISP bonded modem, so anything until ISPs went live with them was 33k with delusions of grandeur.
56K required the ISP to be getting digital circuits (23-channel PRIs) from the phone company. Those went into terminal servers that could serve all 23 channels, and indeed, bigger-capacity terminal servers were one of the things being rolled out in that era (I thiiiiink there may even have been terminal servers that could serve a channelized DS3's worth of inbound lines).
Interestingly, the ISP I was using was founded in 1996, IIRC, and always had digital circuits. I remember signing up as one of their first 500 customers and being very surprised they only had 69 lines. The other thing I remember is that they were expected to go K56flex because the vendor for their terminal servers was on the K56 side, and instead they ended up running X2 on the main number and setting up a separate smaller pool for K56flex. Never found out what caused the switch.
An ISP founded a few years earlier that was actually using banks of physical modems with individual analog lines would have needed a lot more upgrades for 56K. I remember seeing photos of those ISPs' equipment with just rows and rows of USR modems. Very poor usage of space compared to the channelized digital solutions... so really, the way business was booming for a dialup ISP in 1997, probably made sense to move to the much more space-efficient 56K equipment.
I wouldnt usually bother with this but people might in the future use this to get some factual information to build a system so I will.
56k doesnt require a digital circuit to work, it will work at 33.6k on all analogue circuits. But to get 56k speeds you will need a digital circuit at the ISP end. (I will say here to again be technically correct that the V.90 and V.92 standards state a 56k modem isnt capable of originating a 56k connection, they can only receive it, they send at 33.6)
And dont forget the connection was asynchronous, which means the speed up and down wasnt equal... You downloaded faster than you uploaded, and that was because the 56k speed couldnt survive the analogue to digital conversion but it could survive the digital to analogue conversion.
There is a way, a very elaborate way, to set up a fully working 56k network at home. But it would be very expensive. (I know because I did it and in all honesty it wasnt worth the cost. read below for reasons)
6 or 7 years ago it was over £2500 to set up, and that cost would only have increased in time. There are much cheaper ways to get it set up but the transfer speeds are limited to 33.6kbps.
My advice to anybody reading this would be to set up a Cisco SPA122 ATA.
You configure it to forward its calls from one port to the other and then all you have to do is plug one PC in one port (via a modem) and the server in the other port (via a modem, with TS configured) and the PC will be able to dial up the server, log in and then get the network connectivity from that server (via its LAN connection to your home network).
That ATA costs £30-50. the two modems you will need can take any shape or form, they can be serial, PCI or modern USB... A Winmodem will work too. and the two computers can be VMs or physical machines it doesnt matter.
That is the cheapest way to get a "dial up experience"
Which if youre reading this forum that is what youre looking for...