Quick connect This reduces negotiation times to around 10 seconds instead of over 20 seconds. Quick connect works by training the client modem on the first call; analog and digital characteristics are stored in a local profile and then retrieved for future connections.
Modem on hold (MOH) This allows the connection to be temporarily severed and then reconnected, reducing the possibility of dropped connections. This is particularly useful for lines that have
call waiting.
PCM upstream Pulse-code modulation (or PCM) allows higher rate digital transmissions over the analog phone lines. PCM upstream provides a digital connection for upstream data, reducing latency and allowing for a maximum upload speed of 48
kbit/s. Previously the speed was limited to a 33.6 kbit/s analog signal under the previous
V.90.
V.44 compression ITU-T V.44 compression replaces the existing
V.42bis compression standards. It generally allows for between 10% and 120% better compression. In most situations the improvement is around 25%. == See also ==