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IS-41 , also known as ANSI-41 , is a mobile, cellular telecommunications system standard to support mobility management by enabling the networking of switches . ANSI-41 is the standard now approved for use as the network-side companion to the wireless-side AMPS (analog), IS-136 ( Digital AMPS ), cdmaOne , and CDMA2000 networks. It competes with GSM MAP, but the two will eventually merge [ citation needed ] to support worldwide roaming. IS-41 facilitates inter-switch operations like handoff and roaming authentication.