B.1 Determination of TN by the CTS-MS when CTSBCH shifting is not active
3GPP45.010GSM/EDGE Radio subsystem synchronizationTS
When the CTSBCH shifting is not active, the CTSBCH TN is equal to the TNC found in the CTSBCH-SB.
Therefore, the CTS-MS sets TN to TNC when decoding the CTSBCH-SB.