Internet Assigned Numbers Authority

Inter-Asterisk eXchange (IAX) Parameters

Created
2008-12-03
Last Updated
2011-12-07
Available Formats

XML
HTML
Plain text

Registries included below

IAX Meta Commands

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Name Description Reference
0x01 Trunk Meta Frame Indicates that frame is a trunk meta frame. [RFC5457]
0x02 T.38 Primary IFP frame [Kevin_P._Fleming]
0x03-0x7F Unassigned

IAX Frame Types

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Type Description Subclass Description Data Description Reference
0x01 DTMF 0-9, A-D, *, # Undefined [RFC5457]
0x02 Voice Audio Compression Format Data [RFC5457]
0x03 Video Video Compression Format Data [RFC5457]
0x04 Control See Control Frame Subclass Varies with subclass [RFC5457]
0x05 Null Undefined Undefined [RFC5457]
0x06 IAX Control See IAX Protocol Messages Information Elements [RFC5457]
0x07 Text Always 0 Raw Text [RFC5457]
0x08 Image Image Compression Format Raw Image [RFC5457]
0x09 HTML See HTML Frame Types Message Specific [RFC5457]
0x0A Comfort Noise Level in -dBov of comfort noise None [RFC5457]
0x0B T.38 Primary IFP frame No subclasses necessary or allowed [Kevin_P._Fleming]
0x0C-0xFF Unassigned

IAX Control Frame Subclass

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Name Description Reference
0x01 Hangup The call has been hungup at the remote end [RFC5457]
0x02 Reserved Reserved for future use [RFC5457]
0x03 Ringing Remote end is ringing (ring-back) [RFC5457]
0x04 Answer Remote end has answered [RFC5457]
0x05 Busy Remote end is busy [RFC5457]
0x06 Reserved Reserved for future use [RFC5457]
0x07 Reserved Reserved for future use [RFC5457]
0x08 Congestion The call is congested [RFC5457]
0x09 Flash Hook Flash hook [RFC5457]
0x0A Reserved Reserved for future use [RFC5457]
0x0B Option Device-specific options are being transmitted [RFC5457]
0x0C Key Radio Key Radio [RFC5457]
0x0D Unkey Radio Unkey Radio [RFC5457]
0x0E Call Progress Call is in progress [RFC5457]
0x0F Call Proceeding Call is proceeding [RFC5457]
0x10 Hold Call is placed on hold [RFC5457]
0x11 Unhold Call is taken off hold [RFC5457]
0x12-0x7F Unassigned

IAX Control Frames

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Name Description Reference
0x01 NEW Initiate a new call [RFC5457]
0x02 PING Ping request [RFC5457]
0x03 PONG Ping or poke reply [RFC5457]
0x04 ACK Explicit acknowledgment [RFC5457]
0x05 HANGUP Initiate call tear-down [RFC5457]
0x06 REJECT Reject a call [RFC5457]
0x07 ACCEPT Accept a call [RFC5457]
0x08 AUTHREQ Authentication request [RFC5457]
0x09 AUTHREP Authentication reply [RFC5457]
0x0A INVAL Invalid message [RFC5457]
0x0B LAGRQ Lag request [RFC5457]
0x0C LAGRP Lag reply [RFC5457]
0x0D REGREQ Registration request [RFC5457]
0x0E REGAUTH Registration authentication [RFC5457]
0x0F REGACK Registration acknowledgement [RFC5457]
0x10 REGREJ Registration reject [RFC5457]
0x11 REGREL Registration release [RFC5457]
0x12 VNAK Video/Voice retransmit request [RFC5457]
0x13 DPREQ Dialplan request [RFC5457]
0x14 DPREP Dialplan reply [RFC5457]
0x15 DIAL Dial [RFC5457]
0x16 TXREQ Transfer request [RFC5457]
0x17 TXCNT Transfer connect [RFC5457]
0x18 TXACC Transfer accept [RFC5457]
0x19 TXREADY Transfer ready [RFC5457]
0x1A TXREL Transfer release [RFC5457]
0x1B TXREJ Transfer reject [RFC5457]
0x1C QUELCH Halt audio/video [media] transmission [RFC5457]
0x1D UNQUELCH Resume audio/video [media] transmission [RFC5457]
0x1E POKE Poke request [RFC5457]
0x1F Reserved Reserved for future use [RFC5457]
0x20 MWI Message waiting indication [RFC5457]
0x21 UNSUPPORT Unsupported message [RFC5457]
0x22 TRANSFER Remote transfer request [RFC5457]
0x23 Reserved Reserved for future use [RFC5457]
0x24 Reserved Reserved for future use [RFC5457]
0x25 Reserved Reserved for future use [RFC5457]
0x26 TXMEDIA request a media-only transfer [Kevin_P._Fleming]
0x27 RTKEY initiate an encryption key rotation sequence [Kevin_P._Fleming]
0x28 CALLTOKEN provide a call token used for 3-way handshake during call setup [Kevin_P._Fleming]
0x29-0x2F Unassigned
0x30 T38_REQUEST_NEGOTIATE T38_REQUEST_NEGOTIATE [Kevin_P._Fleming]
0x31 T38_REQUEST_TERMINATE T38_REQUEST_TERMINATE [Kevin_P._Fleming]
0x32 T38_NEGOTIATED T38_NEGOTIATED [Kevin_P._Fleming]
0x33 T38_TERMINATED T38_TERMINATED [Kevin_P._Fleming]
0x34 T38_REFUSED T38_REFUSED [Kevin_P._Fleming]
0x35-0x7F Unassigned

IAX HTML Command Subclasses

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Description Reference
0x01 Sending a URL [RFC5457]
0x02 Data frame [RFC5457]
0x03 Unassigned
0x04 Beginning frame [RFC5457]
0x05-0x07 Unassigned
0x08 End frame [RFC5457]
0x09-0x0F Unassigned
0x10 Load is complete [RFC5457]
0x11 Peer does not support HTML [RFC5457]
0x12 Link URL [RFC5457]
0x13 Unlink URL [RFC5457]
0x14 Reject Link URL [RFC5457]
0x15-0x7F Unassigned

IAX Information Elements

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Name Description Reference
0x01 CALLED NUMBER Number/extension being called [RFC5457]
0x02 CALLING NUMBER Calling number [RFC5457]
0x03 CALLING ANI Calling number ANI for billing [RFC5457]
0x04 CALLING NAME Name of caller [RFC5457]
0x05 CALLED CONTEXT Context for number [RFC5457]
0x06 USERNAME Username (peer or user) for authentication [RFC5457]
0x07 PASSWORD Password for authentication [RFC5457]
0x08 CAPABILITY Actual CODEC capability [RFC5457]
0x09 FORMAT Desired CODEC format [RFC5457]
0x0A LANGUAGE Desired language [RFC5457]
0x0B VERSION Protocol version [RFC5457]
0x0C ADSICPE CPE ADSI capability [RFC5457]
0x0D DNID Originally dialed DNID [RFC5457]
0x0E AUTHMETHODS Authentication method(s) [RFC5457]
0x0F CHALLENGE Challenge data for MD5/RSA [RFC5457]
0x10 MD5 RESULT MD5 challenge result [RFC5457]
0x11 RSA RESULT RSA challenge result [RFC5457]
0x12 APPARENT ADDR Apparent address of peer [RFC5457]
0x13 REFRESH When to refresh registration [RFC5457]
0x14 DPSTATUS Dialplan status [RFC5457]
0x15 CALLNO Call number of peer [RFC5457]
0x16 CAUSE Cause [RFC5457]
0x17 IAX UNKNOWN Unknown IAX command [RFC5457]
0x18 MSGCOUNT How many messages waiting [RFC5457]
0x19 AUTOANSWER Request auto-answering [RFC5457]
0x1A MUSICONHOLD Request musiconhold with QUELCH [RFC5457]
0x1B TRANSFERID Transfer Request Identifier [RFC5457]
0x1C RDNIS Referring DNIS [RFC5457]
0x1D Reserved Reserved for future use [RFC5457]
0x1E Reserved Reserved for future use [RFC5457]
0x1F DATETIME Date/Time [RFC5457]
0x20 Reserved Reserved for future use [RFC5457]
0x21 Reserved Reserved for future use [RFC5457]
0x22 Reserved Reserved for future use [RFC5457]
0x23 Reserved Reserved for future use [RFC5457]
0x24 Reserved Reserved for future use [RFC5457]
0x25 Reserved Reserved for future use [RFC5457]
0x26 CALLINGPRES Calling presentation [RFC5457]
0x27 CALLINGTON Calling type of number [RFC5457]
0x28 CALLINGTNS Calling transit network select [RFC5457]
0x29 SAMPLINGRATE Supported sampling rates [RFC5457]
0x2A CAUSECODE Hangup cause [RFC5457]
0x2B ENCRYPTION Encryption format [RFC5457]
0x2C ENCKEY Reserved for future use [RFC5457]
0x2D CODEC PREFS CODEC Negotiation [RFC5457]
0x2E RR JITTER Received jitter, as in [RFC3550] [RFC5457]
0x2F RR LOSS Received loss, as in [RFC3550] [RFC5457]
0x30 RR PKTS Received frames [RFC5457]
0x31 RR DELAY Max playout delay for received frames in ms [RFC5457]
0x32 RR DROPPED Dropped frames (presumably by jitter buffer) [RFC5457]
0x33 RR OOO Frames received Out of Order [RFC5457]
0x34 VARIABLE used to transport variable names and values between endpoints [Kevin_P._Fleming][RFC Errata 2871]
0x35 OSPTOKEN OSP Token Block [RFC5457][RFC Errata 2871]
0x36 CALLTOKEN used with the CALLTOKEN IAX control frame [Kevin_P._Fleming]
0x37 CAPABILITY2 used for expanded codec negotiation [Kevin_P._Fleming]
0x38 FORMAT2 used for expanded codec negotiation [Kevin_P._Fleming]
0x39-0x3F Unassigned
0x40 T38_VERSION T38_VERSION [Kevin_P._Fleming]
0x41 T38_MAX_IFP T38_MAX_IFP [Kevin_P._Fleming]
0x42 T38_MAX_RATE T38_MAX_RATE [Kevin_P._Fleming]
0x43 T38_RATE_MANAGEMENT T38_RATE_MANAGEMENT [Kevin_P._Fleming]
0x44 T38_FILL_BIT_REMOVAL T38_FILL_BIT_REMOVAL [Kevin_P._Fleming]
0x45 T38_MMR_TRANSCODING T38_MMR_TRANSCODING [Kevin_P._Fleming]
0x46 T38_JBIG_TRANSCODING T38_JBIG_TRANSCODING [Kevin_P._Fleming]
0x47-0xFF Unassigned

IAX Authentication Methods

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Note
values must be power of two
Available Formats

CSV
Method Description Reference
0x0001 Reserved (was Plaintext) [RFC5457]
0x0002 MD5 [RFC5457]
0x0003 Unassigned
0x0004 RSA [RFC5457]
0x0004-0xFFFF Unassigned

IAX Dialplan Status Flags

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Note
values must be power of two
Available Formats

CSV
Flag Description Reference
0x0001 Exists [RFC5457]
0x0002 Can exist [RFC5457]
0x0003 Unassigned
0x0004 Non-existent [RFC5457]
0x0005-0x3FFF Unassigned
0x4000 Retain dialtone (ignorepat) [RFC5457]
0x4001-0x7FFF Unassigned
0x8000 More digits may match number [RFC5457]
0x8001-0xFFFF Unassigned

IAX Calling Presentation

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Flag Presentation Reference
0x00 Allowed user/number not screened [RFC5457]
0x01 Allowed user/number passed screen [RFC5457]
0x02 Allowed user/number failed screen [RFC5457]
0x03 Allowed network number [RFC5457]
0x04-0x1A Unassigned
0x020 Prohibited user/number not screened [RFC5457]
0x021 Prohibited user/number passed screen [RFC5457]
0x022 Prohibited user/number failed screen [RFC5457]
0x023 Prohibited network number [RFC5457]
0x24-0x42 Unassigned
0x043 Number not available [RFC5457]
0x44-0xFF Unassigned

IAX Calling Type of Number

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Value Description Reference
0x00 Unknown [RFC5457]
0x01-0x0F Unassigned
0x10 International Number [RFC5457]
0x11-0x1F Unassigned
0x20 National Number [RFC5457]
0x21-0x2F Unassigned
0x30 Network Specific Number [RFC5457]
0x31-0x3F Unassigned
0x40 Subscriber Number [RFC5457]
0x41-0x5F Unassigned
0x60 Abbreviated Number [RFC5457]
0x61-0x6F Unassigned
0x70 Reserved for extension [RFC5457]
0x71-0xFF Unassigned

IAX Transit Network Identification Plan

Registration Procedure(s)
Expert Review
Reference
[RFC5457]
Available Formats

CSV
Bits Description Reference
0000 Unknown [RFC5457]
0001 Caller Identification Code [RFC5457]
0010 Unassigned
0011 Data Network Identification Code [RFC5457]
0100-1111 Unassigned

IAX Type of Network

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Bits Description Reference
000 User Specified [RFC5457]
001 Unassigned
010 National Network Identification [RFC5457]
011 International Network Identification [RFC5457]
100-111 Unassigned

IAX Cause Codes

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Available Formats

CSV
Number Cause Reference
1 Unassigned/unallocated number [RFC5457]
2 No route to specified transit network [RFC5457]
3 No route to specified transit network [RFC5457]
4-5 Unassigned
6 Channel unacceptable [RFC5457]
7 Call awarded and delivered [RFC5457]
8-15 Unassigned
16 Normal call clearing [RFC5457]
17 User busy [RFC5457]
18 No user response [RFC5457]
19 No answer [RFC5457]
20 Unassigned
21 Call rejected [RFC5457]
22 Number changed [RFC5457]
23-26 Unassigned
27 Destination out of order [RFC5457]
28 Invalid number format/incomplete number [RFC5457]
29 Facility rejected [RFC5457]
30 Response to status enquiry [RFC5457]
31 Normal, unspecified [RFC5457]
32-33 Unassigned
34 No circuit/channel available [RFC5457]
35-37 Unassigned
38 Network out of order [RFC5457]
39-40 Unassigned
41 Temporary failure [RFC5457]
42 Switch congestion [RFC5457]
43 Access information discarded [RFC5457]
44 Requested channel not available [RFC5457]
45 Pre-empted (causes.h only) [RFC5457]
46 Unassigned
47 Resource unavailable, unspecified (Q.931 only) [RFC5457]
48-49 Unassigned
50 Facility not subscribed (causes.h only) [RFC5457]
51 Unassigned
52 Outgoing call barred (causes.h only) [RFC5457]
53 Unassigned
54 Incoming call barred (causes.h only) [RFC5457]
55-56 Unassigned
57 Bearer capability not authorized [RFC5457]
58 Bearer capability not available [RFC5457]
59-62 Unassigned
63 Service or option not available (Q.931 only) [RFC5457]
64 Unassigned
65 Bearer capability not implemented [RFC5457]
66 Channel type not implemented [RFC5457]
67-68 Unassigned
69 Facility not implemented [RFC5457]
70 Only restricted digital information bearer capability is available (Q.931 only) [RFC5457]
71-78 Unassigned
79 Service or option not available (Q.931 only) [RFC5457]
80 Unassigned
81 Invalid call reference [RFC5457]
82 Identified channel does not exist (Q.931 only) [RFC5457]
83 A suspended call exists, but this call identity does not (Q.931 only) [RFC5457]
84 Call identity in use (Q.931 only) [RFC5457]
85 No call suspended (Q.931 only) [RFC5457]
86 Call has been cleared (Q.931 only) [RFC5457]
87 Unassigned
88 Incompatible destination [RFC5457]
89-90 Unassigned
91 Invalid transit network selection (Q.931 only) [RFC5457]
92-94 Unassigned
95 Invalid message, unspecified [RFC5457]
96 Mandatory information element missing (Q.931 only) [RFC5457]
97 Message type nonexistent/not implemented [RFC5457]
98 Message not compatible with call state [RFC5457]
99 Information element nonexistent [RFC5457]
100 Invalid information element contents [RFC5457]
101 Message not compatible with call state [RFC5457]
102 Recovery on timer expiration [RFC5457]
103 Mandatory information element length error (causes.h only) [RFC5457]
104-110 Unassigned
111 Protocol error, unspecified [RFC5457]
112-126 Unassigned
127 Internetworking, unspecified [RFC5457]
128-255 Unassigned

IAX Encryption Methods

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Note
values must be power of two
Available Formats

CSV
Method Description Reference
0x0001 AES-128 [RFC5457]
0x0002-0x7FFF Unassigned
0x8000 KEYROTATE - indicates that encryption key rotation is available/will be used [Kevin_P._Fleming]

IAX Media Formats

Registration Procedure(s)
Expert Review
Expert(s)
Cullen Jennings
Reference
[RFC5457]
Note
values must be power of two
Available Formats

CSV
Subclass Description Reference
0x00000001 G.723.1 [RFC5457]
0x00000002 GSM Full Rate [RFC5457]
0x00000004 G.711 mu-law [RFC5457]
0x00000008 G.711 a-law [RFC5457]
0x00000010 G.726 [RFC5457]
0x00000020 IMA ADPCM [RFC5457]
0x00000040 16-bit linear little-endian [RFC5457]
0x00000080 LPC10 [RFC5457]
0x00000100 G.729 [RFC5457]
0x00000200 Speex [RFC5457]
0x00000400 ILBC [RFC5457]
0x00000800 G.726 AAL2 [RFC5457]
0x00001000 G.722 [RFC5457]
0x00002000 AMR [RFC5457]
0x00010000 JPEG [RFC5457]
0x00020000 PNG [RFC5457]
0x00040000 H.261 [RFC5457]
0x00080000 H.263 [RFC5457]
0x00100000 H.263p [RFC5457]
0x00200000 H.264 [RFC5457]

Contact Information

ID Name Contact URI Last Updated
[Kevin_P._Fleming] Kevin P. Fleming mailto:kpfleming&digium.com 2009-07-12