** Shares of Avantel NSE:AVANTEL extend gains, rises 4% to 191 rupees
** AVAN rose as much as 5.8% to 194.4 rupees early in the day, marking its highest level since August 1, 2024
** Communication systems manufacturer wins 193.3 mln rupee ($2.2 mln) order for service from Larsen and Toubro NSE:LT for satcom products servicing
** Order to be executed by July 2026
** Stock has risen 16% in 7 days; previous longest rally of 8 days ended on April 22, rose about 20%
** Reuters was unable to confirm the reason for the rallies
** YTD, Avantel shares up nearly 26%
($1 = 88.2000 Indian rupees)