Sample dectrace output

In the following sample of dectrace output text, the arrow after the board number shows if the message was received (<--) or sent (-->).

    43.61 
          protocol discriminator = Q.931 Call Control
          call reference = 01 00  flag = 0
00000101  message type = SETUP   board 00  nai 00  group 00  -->
00000100    IE bearer capability
00000011        length = 0x03 
              octet 3
1-------        extension bit
-00-----        coding standard = CCITT
---00000        information transfer capability = speech
              octet 4
1-------        extension bit
-00-----        transfer mode = circuit mode
---10000        information transfer rate = 64 Kbit/s
              octet 5
1-------        extension bit
-01-----        layer 1 id = layer 1 id
---00010        user info layer 1 = mu law
00011000    IE channel identification
00000011        length = 0x03 
              octet 3
1-------        extension bit
-0------        interface identifier = implicitly identified
--1-----        interface type = PRI
---0----        spare bits = spare bits
----1---        pref/excl = exclusive
-----0--        D-channel ind = not
------01        info channel selection = B1 channel
              octet 3.2
1-------        extension bit
-00-----        coding standard = CCITT
---0----        number/map = number
----0011        channel type = B channel
              octet 3.3
1-------        extension bit
-0000001        channel number = 0x01 
01110000    IE called party number
00000100        length = 0x04 
              octet 3
1-------        extension bit
-000----        type of number = unknown
----0000        numbering plan = unknown
              octet 4 etc
                number = 12.

channel number = 0x01 

    43.67   
          protocol discriminator = Q.931 Call Control
          call reference = 01 00  flag = 1
00000010  message type = CALL_PROCEEDING   board 00  nai 00  group 00  <--
00011000    IE channel identification
00000011        length = 0x03 
              octet 3
1-------        extension bit
-0------        interface identifier = implicitly identified
--1-----        interface type = PRI
---0----        spare bits = spare bits
----1---        pref/excl = exclusive
-----0--        D-channel ind = not
------01        info channel selection = B1 channel
              octet 3.2
1-------        extension bit
-00-----        coding standard = CCITT
---0----        number/map = number
----0011        channel type = B channel
              octet 3.3
1-------        extension bit
-0000001        channel number = 0x01 


    45.84   
          protocol discriminator = Q.931 Call Control
          call reference = 01 00  flag = 1
00000001  message type = ALERTING   board 00  nai 00  group 00  <--