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In general SACCH are used in every traffic channel And are used for low rate, non critical signaling.

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Posted by HamidAliKhan

SACCH - Slow Associated Control Channel
The PACCH has a similar function to the SACCH in GSM circuit switched operations , in that it is a radio resources signalling channel, but unlike the SACCH, ...for more details
books.google.com.pk/books?isbn=0470095083...

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Posted by waqasahmad

SACCH are used in every traffic channel And are used for low rate, non critical signaling.

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Posted by sagitraz

SACCH stands for slow associated control channel.

Function:

SACCH is used for radio link measurement and power control messages.

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Posted by Hash007

Please follow the following link

http://books.google.com.pk/books?id=KGhh3OOIx58C&pg=PA87&lpg=PA87&dq=What+is+function+of+SACCH+in+GSM%3F&source=bl&ots=c7yn5NBm6c&sig=PObOwCO-kOoij57o0xn8qr27THY&hl=en&sa=X&oi=book_result&resnum=5&ct=result

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Posted by jahangir1983