求翻译：GSM系统越区时采用切换方式，即当用户到达小区边界时，手机会先与原来的基站切断联系，然后再与新的服务小区的基站建立联系，当新的服务小区繁忙时，不能提供通话信道，这时就会发生掉线现象。因此，用户在使用手机通话时，应尽量避免在四角盲区使用，以减少通话掉线的机率。是什么意思？

gsm system of cross-district, switching mode, that is, when the user reaches the cell boundary, the phone will cut off the original base station contact, and then to establish contact with the new serving cell base station, when the serving cell is busy, can not provide call channel, then dropped th

When the system GSM switch, that is when the user to access the small area at the boundary, and the opportunity to base station with the original cut off contact, and then with the new service small area of the base station, when a new service area is busy, call channel cannot be provided, this is w

The GSM system more zone time selects the cut method, namely when the user arrives the plot boundary, the handset could first with the original base depot cut-off relation, then again with the new service plot base depot establishment relation, when new service plot busy, cannot provide the telephon

Districts of the GSM system in a switch, that is, when the user reaches the community boundaries, hand opportunity to cut off contact with original base station, and then establishing ties with the new service community base station when the new service community is busy, cannot provide the calling

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