Requires hardware to dial the ISP (such as a modem or ISDN terminal adapter) and software to govern the connection.
Dialup connection uses existing analog voice telephone lines.
56kbit/s modems are common, which is significantly slower than DSL or cable modem connections. Dial up connections can be compressed to reach up to 320 kbit/s. Because dial up connections provide slow throughput they are difficult to scale and aren’t often seen today. However, you may see dial up connection is large enterprise environments as a backup in case a DSL or cable connection to a remote site goes down.