H.221

(redirected from H221)

H.221

An ITU standard for the framing structure of a videoconferencing transmission over a 64 to 1920 Kbits/sec channel. See H.230.
References in periodicals archive ?
Table 2: The drilling, loading and haulage fleet Drill jumbos Type Task Number Tamrock H207M Development 6 Puma 2100EH-A Development 1 Tamrock Solo 406 Fan drilling 3 Tamrock Solo 606 Fan drilling 7 Atlas Copco Simba H221 Fan drilling 4 Atlas Copco Simba H253 Fan drilling 2 Cubex Megamatic Large diameter slot holes 5 There are also 13 bolting rigs, mainly Atlas Copco Bolter H126s.
Parallel blastholes are drilled down into the bench, normally with Atlas Copco Simba H221 rigs.