A standard defined by the GSM Association for general packet radio service (GPRS) roaming. The standard enables mobile Internet services to be accessed through an Internet Protocol network managed and operated by a third party. See GPRS.
GPRS Roaming Exchange - An IP backbone network that connects GPRS networks around the world so whenever you roam with GPRS you use a common IP backbone There are several potential providers of GRX services, so they must have peering arrangements with each other to ensure GPRS roaming can take place.