
Updates
Spirent Communications SPT.L rises as much as 2.4% to 190p; among top pct gainers on FTSE 250 .FTMC index
Electronics equipment maker Keysight Technologies KEYS.N signs deal with Viavi Solutions VIAV.O to sell SPT's high-speed ethernet and network security business lines for $410 mln base cash consideration
An additional $15 mln contingent cash consideration is to be paid at closing
KEYS, which outbid VIAV to buy Spirent for ~1.16 bln pounds ($1.46 bln) last March, expects sale to complete shortly after SPT's acquisition becomes effective
Stock gains more than 74% over past 12 months
($1 = 0.7928 pounds)