** Satellite communication services provider AvantiCommunications shares up 9.5%, best day since August
** Co says begun process to pay debt due in Oct. throughdebt issue which matures in 2019, to address liquidity issue
** Co sees rev growth 35-40 pct over next 2-3 yrs
** 45% of 30-day avg vol gone through in first hour
** Co put itself up for sale in July (Reuters Messaging:pranav.kiran@thomsonreuters.com@reuters.net)