Sonus Networks (SONS) 4.47 +0.19: -- Before Open -- CE Unterberg Towbin initiates coverage with a Buy rating and price target of $7; believes Sonus is well positioned at the forefront of the rapidly developing softswitch market, company has established an early mover advantage in delivering a full range of softswitch product platforms; says Sonus' products are a high priority in large service providers' strategic directions, which could provide some upside to firm's 2002 revenue and EPS estimates.