Editing Packet Switch Stream (section)

===Speeds===
[[file:Kingsway tunnels -JPP 7837 (14619958901).jpg|thumb|BT KiloStream equipment in a telephone exchange in 2004]]

There was a choice of different speeds of PSS lines; the faster the line the more expensive it cost to rent it. The highest and lowest speed lines were provided by the ''[[BT Megastream|Megastream]]'' and ''[[BT Kilostream|Kilostream]]'' services, 2M ([[Mega-|Mega]]) bit/s and 256K ([[Kilo-|kilo]]) bit/s respectively. On analog links 2400 bit/s, 4800 bit/s, 9600 bit/s and 48&nbsp;kbit/s were offered. Individual users could link into PSS, on a pay as you go basis, by using a 110, 300, 1200/75, 1,200 or 2,400 bit/s [[public switched telephone network|PSTN]] modem to connect a Data Terminal Equipment terminal into a local PSS exchange. Note: in those days 2,400 bit/s modems were quite rare; 1,200 bit/s was the usual speed in the 1980s, although 110 and 300 bit/s modems were not uncommon.