With LTE build-outs accelerating in many regions, the need for international roaming is becoming a hot one, and a key driver for providers of intercarrier IPX (IP Exchange) services. The new 4G opportunities for IPX are particularly linked to VoLTE, which is starting to be deployed in earnest this year. But with Vodafone claiming last year there would be ‘no room’ left for independent IPX providers, as carriers build their own services, it was notable that, just as VoLTE was opening new doors, consolidation was already taking place in that sector. The acquisition of one IPX player, Aicent, by another, Syniverse, suggests that growth may be channelled towards the big operators, many of which are extending their IPX businesses, as…