ISDN_P_NT_E1      225 include/linux/mISDNif.h #define IS_ISDN_P_NT(p) ((p == ISDN_P_NT_S0) || (p == ISDN_P_NT_E1) || \
ISDN_P_NT_E1      228 include/linux/mISDNif.h #define IS_ISDN_P_E1(p) ((p == ISDN_P_TE_E1) || (p == ISDN_P_NT_E1))