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

ík Low-speed data at 64 kbit/s in bits 1-8, no framing.
ar-LSD Low-speed data occupying all I-channel capacíty not allocated under other fixed-rate
commands; cannot be invoked when other LSD is on, or when varíable-MLP ¡s on (may
also be impractical when video is on in I-channel alone).
Exact var-LSD rate: 62.4 kbit/s - audio rate - {800 bit/s if ECS is ON} - {fixed-MLP
ifONJ.
TI(R) Three codes reserved for cornmunicatíng the status of the data terminal equipment
ínterfaces.
[LP-off MLP off in all channels.
[LP-4k MLP on at 4 kbit/s in octets 41-80 of SC.
ÍLP-6.4k MLP on at 6.4 kbit/s in octets 17-80 of SC; if ECS channel is in use, the data rate is
reduced to 5.6 kbit/s in octets 25-80, but returns to 6.4 kbit/s if ECS channel is closed.
ar-MLP MLP occupying all I-channel capacity not allocated under other fixed-rate commands:
cannot be invoked when other MLP is on, or when variable-LSD is on (may also be
impractical when vídeo is on in I-channel alone).
.5 Audio capabilities
Exact var-MLP rate: 62.4 kbit/s - audio rate- {800 bit/s if ECS is ON} - (fixed-LSD
if ON}.
eutral Neutral capability: no change in the current capabiliiies of ihe terminal.
-law Capable of decoding audio to Recommendation G.711, A-law.
law Capable of decoding audio to Recommendation G.711, u-law.
.722-64 Capable of decoding audio to Recommendation G.722 (mode 1) and to Recommendation
G.711.
.722-48 Capable of decoding audio to Recommendation G.722 (modes 1, 2, 3) and to Recommendation
G.711.
u-16k Capable of decoding audio, both to Recommendation G.728 and Recommendatión G.711.
u-ISO Capable of decoding audio to ISO standard al all rates up lo 384 kbít/s.
.6 VideOj MBE and encryption capabilities (101)
CIF Can decode vídeo to QCIF picture format, but not CIF (see Recommendation H.261) -
this code must be followed by one of the four minimum piciure interval (MPI) valúes
below.
7 Can decode vídeo to CIF and QCIF formáis (see Recommendation H.261) - this code
must be followed by two MPI valúes, the first applicable to QCIF and the other to CIF
format.
Minimum picture interval (MPI) codes are as follows:
29.97 Can decode video, having a minimum picture interval . of 1/29.97 seconds, to
Recommendation H.261.
29.97 Can decode video, having a minimum picture interval of 2/29.97 seconds, to
Recommendation H.261.
Recommendation H.221 (03/93) 21