Call Detail Record for a real call in progress on a D-channel. Real calls are those that involve B-channels. The bytes in a CDR for a call in progress are interpretted as follows (note that this is the same as the interpretation for CDRs associated with active virtual calls): Part 1: generic information 1: CDR type, values are: level 1 (1) level 2 (2) active (3) - this applies for both Part 2 and Part 3 not applicable (0) - this means that there is no active CDR for this real call ID, 2: unused 3-4: partition ID 5-6: call ID 7-8: unused Part 2: Level 1 (Physical Characteristics): 9-12: originating time 13-16: answer time 17-20: disconnect time 21-22: B-channel source node ID 23: B-channel source nest ID 24: B-channel source slot ID 25-26: B-channel source port ID 27-28: B-channel source channel ID 29-30: B-channel destination node ID 31: B-channel destination nest ID 32: B-channel destination slot ID 33-34: B-channel destination port ID 35-36: B-channel destination channel ID 37: call type, values are: real (3) virtual (0) 38: special profile type, values defined in attribute recfDsmDChQOSCallType 39: info type, values are: Q.Sig speech (0) DPNSS A-law (1) DPNSS ADPCM (2) DPNSS Mu-law (3) Unrestricted data (8) Restricted data (9) 3.1 KHz audio (16) 7 KHz audio (17) video (24) 40: special profile index 41: channel profile index 42: unused (needed for NCP clear cause, which is never valid for calls in progress) 43: unused (needed for clear cause, which is never valid for calls in progress) 44: number of call attempts between DSMs 45-48: transmission rate Part 3: Level 2 (Data Link Layer): 49-52: setup final time 53-56: connect request time 57-60: connect response time 61-62: source node ID 63: source nest ID 64: source slot ID 65-66: destination node ID 67: destination nest ID 68: destination slot ID 69: calling number size (number of bytes, not string length) - this number is referred to from now on as x 70-(69+x): calling number (70+x): called number size (number of bytes, not string length) - this number is referred to from now on as y (71+x)-(70+x+y): called number (71+x+y): routing digits (72+x+y): unused.