+ int tespecial; /* special TE-mode behavior */
+ int l1hold; /* hold layer 1 (1=on, 0=off) */
+ int l2hold; /* hold layer 2 (1=force, -1=disable, 0=default) */
+ int gsm; /* interface is an GSM interface */
+ unsigned int ss5; /* set, if SS5 signalling enabled, also holds feature bits */