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Reply To: Mapping between SCCP and BSSMAP


Dear, Sachin,
Yes, it is optional parameter, but if MSC requests TCH from BSC for speech call then terrestrial circiut (CIC) also must be allocated in Assignment Request. This CIC is correlated in BSC with Local Reference and TCH after TCH assignment. Using this information BSC switches the CIC with A-bis subslot assosiated with allocated TCH.