User manual

TECHNICAL INFORMATION Appendix-3

STX Start of Text

SYN Synchronous Character

uK Lower Channel

Sign Data Frame, made up of Data bits

Length Start, Stop and Parity bits

CCITT RECOMMENDATIONS

V.21 300 bps, full-duplex, synchronous and asynchronous, 2-point Fre-

quency Shift Keying

V.22 1200 bps with Fallback to 600 bps, full-duplex, synchronous and

asynchronous 4-point Frequency Shift Keying

V.22bis 2400 bps with Fallback to 1200 bps, full-duplex, synchronous and

asynchronous 16-point Quadratic Amplitude Modulation

V.23 1200/1200 bps in 4-wire operation, 1200/75 bps in 2-wire opera-

tion, 600/600 bps in 4-wire operation, 75/1200 bps in 2-wire oper-

ation, 75/600 bps in 2-wire operation, 75/75 bps in 2-wire opera-

tion, synchronous and asynchronous, Frequency Shift Keying

V.24 List of deﬁnitions for interface cabling between Data Terminal

Equipment (DTE) and Data Communication Equipment (DCE)

V.25 Automatic Call-Answering Equipment and/or Parallel Dialling

Equipment in the public telephone dialling system, using 200

Group interface cabling

V.25bis Automatic Dialling and/or Call-Answering Equipment in the pub-

lic telephone dialling system, using 100 Group interface cabling

V.26 2400 bps with Fallback to 1200 bps, 4-wire dedicated line, 4-phase

differential modulation

V.26bis 2400 bps with Fallback to 1200 bps, dialling line operation, half-

duplex, synchronous, 4-phase differential modulation

V.26ter 2400 bps with Fallback to 1200 bps, dialling and 2-wire dedicated

line operation with echo elimination, full-duplex, synchronous,

differential phase modulation

V.27 4800 bps with Fallback to 2400 bps, 4-wire dedicated line opera-

tion, 8-phase differential modulation, synchronous, half/full-du-

plex

V.27bis 4800 bps with Fallback to 2400 bps, full or half-duplex in 4-wire,

dedicated line operation, 8-phase differential modulation at 4800

bps; 4-phase differential modulation at 2400 bps

V.27ter 4800 bps with Fallback to 2400 bps, dialling line operation, half-

duplex; with 8-phase differential modulation at 4800 bps and 4-

phase differential modulation at 2400 bps.