- Source: ITU-T V.92
V.92 is an ITU-T recommendation, titled Enhancements to Recommendation V.90, that establishes a modem standard allowing near 56 kb/s download and 48 kb/s upload rates. With V.92 PCM is used for both the upstream and downstream connections; previously 56K modems only used PCM for downstream data. The recommendation was issued in November 2000, with amendments in July 2001 and March 2002.
New features
= 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
Dial-up Internet access
List of interface bit rates
External links
ITU-T Recommendation V.92: Enhancements to Recommendation V.90
ITU-T Recommendations: Series V
Kata Kunci Pencarian:
- T. V. Rajeswar
- T-72
- Uranium
- Modulasi frekuensi
- Ambroksol
- Vanadium
- Homonim
- Pesawat pengebom V
- Kleopatra
- Daftar ras domba
- ITU-T V.92
- List of ITU-T V-series recommendations
- ITU-T V.23
- Physical layer
- Modem
- Modem over VoIP
- List of country calling codes
- H.323
- VDSL
- G.992.2
