text: Telephone Tag (Forbes.com) Forbes.com - ARRIS GROUP (5, ARRS) saw its market cap unjustifiably halved recently when Comcast, a huge customer (24 of Arris' sales), hinted it might buy next-generation technology from Cisco Systems. Arris supplies the technical guts that cable companies use to provide phone service. (For the reverse phenomenon, see story on p. 162.)