Compatibility, as used in connection with this standard, is understood to mean:
Any cdma2000?1 2 mobile station is able to place and receive calls in cdma2000 or
IS-95 systems. Conversely, any cdma2000 system is able to place and receive calls
for cdma2000 and IS-95 mobile stations. In a subscriber’s home system, all call
placement must be automatic. Call placement preferably should be automatic
when a mobile station is in roam status.