Tesis previa a la obtención del Título de Ingeniero en Electrónica y ...

irsor data on in LSD Cursor data swítched on in specified LSD.
x on in LSD Fax switched on in specified LSD.
x on in HSD Fax switched on in specified HSD.
,120 LSD V.120 switched on in specified LSD.
120 HSD V.120 switched on in specified HSD.
Annex B
Frame structure for interworking between a 64 kbit/s terminal
1 Sub-channel arrangement
ie sub-channel arrangement is given in Table B.l.
2 Operation of the 64 kbit/s terminal
and a 56 kbit/s terminal
(Thís annex forms an integral part of this Recommendation)
le transmitter filis the eighth sub-channel wlth "1", whíle the receiver searches FAS at every sub-channel. lt should be
ted that at the receiver side stuffing bits "1" appear always at Bit number 8, but FAS and BAS appear at any of Bit
mbers 1-7.
3 Restriction against some communication modes
nce the interworkmg bit rate becomes 56 kbit/s, the transmission modes using more than 56 kbil/s are forbidden
ceívers ignore these command BAS codes). Facilities using the original seventh sub-channel move to the sixth subannel.
4 Audio command codes (000)
,e following are applicable ínstead of those in Annex A.
¡utral Neutralizad ]-channel, contaíning only FAS and BAS; all other bits are to be Ignored at
the receiver.
i-off, U No audio signal, no framíng; bits 1-7 of the I-channel are available.
i-off, F No audio signal, FAS and BAS in use; 54.4 kbit/s available for use under other
commands.
law, U7 G.711 audio at 56 bit/s, A-law truncated to 7 bits, no framing (mode OU).
law, F6 G.711 audio at 48 kbit/s, A-law truncated to 6 bits, with FAS and BAS in bit 7.
law, U7 G.711 audio at 56 kbit/s, Ji-law truncated to 7 bits, no framing (mode OU).
|aw, F6 G.711 audio at 48 kbit/s, ]I-law truncated lo 6 bits, with FAS and BAS ín bit 7.
722, U8 Not possíble to transmit 8 bits per octet.
722, U7 G.722 7 kHz audio in bits 1-7, 56 kbít/s (unframed).
722, F6 G.722 7 kHz. audio at 48 kbit/s, in bits 1-6 (mode 3).
1-16 kbit/s Audio at 16 kbit/s to Recommendation G.728 in bits 1,2 (mode 7).
ther] All other valúes reserved.
Recommendation H.221 (03/93)