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VC - VIRTUAL CIRCUIT
VPN - VIRTUAL PRIVATE NETWORK
VoIP - VOICE over INTERNET PROTOCOL
V.22bis The first true world standard, it allows 2400 bits per second at 600 baud V.32 Provides 4800 and 9600 bits per second at 2400 baud
V.32bis Provides 14,400 bits per second or fallback to 12,000, 9600, 7200, and 4800 bits per second
V.32terbo Provides 19,200 bits per second or fallback to 12,000, 9600, 7200, and 4800 bits per second; can operate at higher data rates with compression; was not a CCITT/ITU standard
V.34 Provides 28,800 bits per second or fallback to 24,000 and 19,200 bits per second and backwards compatility with V.32 and V.32bis
V.34bis Provides up to 33,600 bits per second or fallback to 31,200 or V.34 transfer rates
V.35 The trunk interface between a network access device and a packet network at data rates greater than 19.2 Kbps. V.35 may use the bandwidths of several telephone circuits as a group. There are V.35 Gender Changers and Adapters.
V.42 Same transfer rate as V.32, V.32bis, and other standards but with better error correction and therefore more reliable
Provides up to 56,000 bits per second downstream (but in practice somewhat less). Derived
from the x2 technology of 3Com (US Robotics) and Rockwell's K56flex technology.
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