1ISDN_P_BASE 0 2ISDN_P_TE_S0 1 3ISDN_P_NT_S0 2 4ISDN_P_TE_E1 3 5ISDN_P_NT_E1 4 6ISDN_P_LAPD_TE 0x10 7ISDN_P_LAPD_NT 0x11 8ISDN_P_B_RAW 0x21 9ISDN_P_B_HDLC 0x22 10ISDN_P_B_X75SLP 0x23 11ISDN_P_B_L2DTMF 0x24 12ISDN_P_B_L2DSP 0x25 13ISDN_P_B_L2DSPHDLC 0x26 14/* 15 * those two are present in include/linux/mISDNif.h but are not handled during 16 * socket creation. 17 */ 18/* ISDN_P_B_T30_FAX 0x27 */ 19/* ISDN_P_B_MODEM_ASYNC 0x28 */ 20