Latency was also a contributing factor. 56K modem latency is about 200 to 300ms higher than latency on a pure digital connection (ISDN, 56K frame relay, 56K DDS

Latency was also a contributing factor. 56K modem latency is about 200 to 300ms higher than latency on a pure digital connection (ISDN, 56K frame relay, 56K DDS, etc.)