V.32bis

(communications, standard)

V.32 twice. An extension of the ITU-T V.32 modem protocol allowing 14400 bits per second with fall back to 12000bps, 9600bps, 7200bps and 4800 bps.

The modem should select the appropriate speed according to the current line conditions.

See also V.32ter.

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V.32bis

An ITU standard (1991) for asynchronous and synchronous 4,800, 7,200, 9,600, 12,000 and 14,400 bps full-duplex analog modems using trellis-coded modulation (TCM) and echo cancellation. It supports rate renegotiation, which allows modems to change speeds as required.

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References in periodicals archive

When the switch falls to the B or spare side, a V.32bis modem will dial a preprogrammed number assigned to a dial modem at the network source.

S&P ComStock adds high-speed dial backup on ISDN

However, a V.32bis dial-up modem could reduce this to 780 minutes per week or less, depending upon the vendor's bit compression scheme.

For example, a Codex 3260 series V.32bis modem at 38.4 kb/s throughput, might reduce this to 787 minutes per week, while an AT&T 3810 Software Defined (SD) series dial-up modem at 57.6 kb/s, would drop this to under 600 minutes per week.

New strategies for dial-up modem users

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