The COR limits the end users ability to call by use of FRL levels. On the station an FRL of 1 is most restrictive and 7 is least. If the route pattern carries an FRL of 3 and your COR has an FRL of 1, your call will be waved off.
TN stands for tenant partition. Unless you are in an environment where 2 businesses or departments need separate attendants and trunks - the TN will always be 1.
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