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	<id>https://wiki.ultiroam.com/index.php?action=history&amp;feed=atom&amp;title=GSM_Release_cause_%2F_Q.931</id>
	<title>GSM Release cause / Q.931 - Revision history</title>
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	<updated>2026-04-17T03:36:06Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.ultiroam.com/index.php?title=GSM_Release_cause_/_Q.931&amp;diff=3931&amp;oldid=prev</id>
		<title>Administrator at 20:02, 12 May 2024</title>
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		<updated>2024-05-12T20:02:42Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:02, 12 May 2024&lt;/td&gt;
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&lt;!-- diff cache key wikiUR:diff:1.41:old-3930:rev-3931:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Administrator</name></author>
	</entry>
	<entry>
		<id>https://wiki.ultiroam.com/index.php?title=GSM_Release_cause_/_Q.931&amp;diff=3930&amp;oldid=prev</id>
		<title>Administrator at 20:02, 12 May 2024</title>
		<link rel="alternate" type="text/html" href="https://wiki.ultiroam.com/index.php?title=GSM_Release_cause_/_Q.931&amp;diff=3930&amp;oldid=prev"/>
		<updated>2024-05-12T20:02:28Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:02, 12 May 2024&lt;/td&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;GSM release causes for L3 Call Control (GSM 04.08)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;&lt;/ins&gt;GSM release causes for L3 Call Control (GSM 04.08)&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|-&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|-&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key wikiUR:diff:1.41:old-3929:rev-3930:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Administrator</name></author>
	</entry>
	<entry>
		<id>https://wiki.ultiroam.com/index.php?title=GSM_Release_cause_/_Q.931&amp;diff=3929&amp;oldid=prev</id>
		<title>Administrator: Created page with &quot;&lt;includeonly&gt;=GSM Release Cause=&lt;/includeonly&gt; GSM release causes for L3 Call Control (GSM 04.08) {| class=&quot;wikitable&quot; border=1 |- !Hex !Decimal !Cause |- | 0x1 | 1 | Unallocated or unassigned number |- | 0x2 | 2 | No route to specified transit network (Transit Network Identity) |- | 0x3 | 3 | No route to destination |- | 0x4 | 4 | Send special information tone |- | 0x5 | 5 | Misdialled trunk prefix |- | 0x6 | 6 | Channel unacceptable |- | 0x7 | 7 | Call awarded and bein...&quot;</title>
		<link rel="alternate" type="text/html" href="https://wiki.ultiroam.com/index.php?title=GSM_Release_cause_/_Q.931&amp;diff=3929&amp;oldid=prev"/>
		<updated>2024-05-12T20:00:16Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;lt;includeonly&amp;gt;=GSM Release Cause=&amp;lt;/includeonly&amp;gt; GSM release causes for L3 Call Control (GSM 04.08) {| class=&amp;quot;wikitable&amp;quot; border=1 |- !Hex !Decimal !Cause |- | 0x1 | 1 | Unallocated or unassigned number |- | 0x2 | 2 | No route to specified transit network (Transit Network Identity) |- | 0x3 | 3 | No route to destination |- | 0x4 | 4 | Send special information tone |- | 0x5 | 5 | Misdialled trunk prefix |- | 0x6 | 6 | Channel unacceptable |- | 0x7 | 7 | Call awarded and bein...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;lt;includeonly&amp;gt;=GSM Release Cause=&amp;lt;/includeonly&amp;gt;&lt;br /&gt;
GSM release causes for L3 Call Control (GSM 04.08)&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; border=1&lt;br /&gt;
|-&lt;br /&gt;
!Hex&lt;br /&gt;
!Decimal&lt;br /&gt;
!Cause&lt;br /&gt;
|-&lt;br /&gt;
| 0x1&lt;br /&gt;
| 1&lt;br /&gt;
| Unallocated or unassigned number&lt;br /&gt;
|-&lt;br /&gt;
| 0x2&lt;br /&gt;
| 2&lt;br /&gt;
| No route to specified transit network (Transit Network Identity)&lt;br /&gt;
|-&lt;br /&gt;
| 0x3&lt;br /&gt;
| 3&lt;br /&gt;
| No route to destination&lt;br /&gt;
|-&lt;br /&gt;
| 0x4&lt;br /&gt;
| 4&lt;br /&gt;
| Send special information tone&lt;br /&gt;
|-&lt;br /&gt;
| 0x5&lt;br /&gt;
| 5&lt;br /&gt;
| Misdialled trunk prefix&lt;br /&gt;
|-&lt;br /&gt;
| 0x6&lt;br /&gt;
| 6&lt;br /&gt;
| Channel unacceptable&lt;br /&gt;
|-&lt;br /&gt;
| 0x7&lt;br /&gt;
| 7&lt;br /&gt;
| Call awarded and being delivered in an established channel&lt;br /&gt;
|-&lt;br /&gt;
| 0x8&lt;br /&gt;
| 8&lt;br /&gt;
| Prefix 0 dialed but not allowed&lt;br /&gt;
|-&lt;br /&gt;
| 0x9&lt;br /&gt;
| 9&lt;br /&gt;
| Prefix 1 dialed but not allowed&lt;br /&gt;
|-&lt;br /&gt;
| 0xA&lt;br /&gt;
| 10&lt;br /&gt;
| Prefix 1 not dialed but required&lt;br /&gt;
|-&lt;br /&gt;
| 0xB&lt;br /&gt;
| 11&lt;br /&gt;
| More digits received than allowed, call is proceeding&lt;br /&gt;
|-&lt;br /&gt;
| 0x10&lt;br /&gt;
| 16&lt;br /&gt;
| Normal call clearing&lt;br /&gt;
|-&lt;br /&gt;
| 0x11&lt;br /&gt;
| 17&lt;br /&gt;
| User busy&lt;br /&gt;
|-&lt;br /&gt;
| 0x12&lt;br /&gt;
| 18&lt;br /&gt;
| No user responding&lt;br /&gt;
|-&lt;br /&gt;
| 0x13&lt;br /&gt;
| 19&lt;br /&gt;
| T.301 expired: – User Alerted, No answer from user&lt;br /&gt;
|-&lt;br /&gt;
| 0x15&lt;br /&gt;
| 21&lt;br /&gt;
| Call rejected&lt;br /&gt;
|-&lt;br /&gt;
| 0x16&lt;br /&gt;
| 22&lt;br /&gt;
| Number changed to number in diagnostic field.&lt;br /&gt;
|-&lt;br /&gt;
| 0x17&lt;br /&gt;
| 23&lt;br /&gt;
| Reverse charging rejected&lt;br /&gt;
|-&lt;br /&gt;
| 0x18&lt;br /&gt;
| 24&lt;br /&gt;
| Call suspended&lt;br /&gt;
|-&lt;br /&gt;
| 0x19&lt;br /&gt;
| 25&lt;br /&gt;
| Call resumed&lt;br /&gt;
|-&lt;br /&gt;
| 0x1A&lt;br /&gt;
| 26&lt;br /&gt;
| Non-selected user clearing&lt;br /&gt;
|-&lt;br /&gt;
| 0x1B&lt;br /&gt;
| 27&lt;br /&gt;
| Destination out of order&lt;br /&gt;
|-&lt;br /&gt;
| 0x1C&lt;br /&gt;
| 28&lt;br /&gt;
| Invalid number format or incomplete address&lt;br /&gt;
|-&lt;br /&gt;
| 0x1D&lt;br /&gt;
| 29&lt;br /&gt;
| EKTS facility rejected by network&lt;br /&gt;
|-&lt;br /&gt;
| 0x1E&lt;br /&gt;
| 30&lt;br /&gt;
| Response to STATUS ENQUIRY&lt;br /&gt;
|-&lt;br /&gt;
| 0x1F&lt;br /&gt;
| 31&lt;br /&gt;
| Normal, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x21&lt;br /&gt;
| 33&lt;br /&gt;
| Circuit out of order&lt;br /&gt;
|-&lt;br /&gt;
| 0x22&lt;br /&gt;
| 34&lt;br /&gt;
| No circuit/channel available&lt;br /&gt;
|-&lt;br /&gt;
| 0x23&lt;br /&gt;
| 35&lt;br /&gt;
| Destination unattainable&lt;br /&gt;
|-&lt;br /&gt;
| 0x24&lt;br /&gt;
| 36&lt;br /&gt;
| Out of order&lt;br /&gt;
|-&lt;br /&gt;
| 0x25&lt;br /&gt;
| 37&lt;br /&gt;
| Degraded service&lt;br /&gt;
|-&lt;br /&gt;
| 0x26&lt;br /&gt;
| 38&lt;br /&gt;
| Network out of order&lt;br /&gt;
|-&lt;br /&gt;
| 0x27&lt;br /&gt;
| 39&lt;br /&gt;
| Transit delay range cannot be achieved&lt;br /&gt;
|-&lt;br /&gt;
| 0x28&lt;br /&gt;
| 40&lt;br /&gt;
| Throughput range cannot be achieved&lt;br /&gt;
|-&lt;br /&gt;
| 0x29&lt;br /&gt;
| 41&lt;br /&gt;
| Temporary failure&lt;br /&gt;
|-&lt;br /&gt;
| 0x2A&lt;br /&gt;
| 42&lt;br /&gt;
| Switching equipment congestion&lt;br /&gt;
|-&lt;br /&gt;
| 0x2B&lt;br /&gt;
| 43&lt;br /&gt;
| Access information discarded&lt;br /&gt;
|-&lt;br /&gt;
| 0x2C&lt;br /&gt;
| 44&lt;br /&gt;
| Requested circuit channel not available&lt;br /&gt;
|-&lt;br /&gt;
| 0x2D&lt;br /&gt;
| 45&lt;br /&gt;
| Preempted&lt;br /&gt;
|-&lt;br /&gt;
| 0x2E&lt;br /&gt;
| 46&lt;br /&gt;
| Precedence call blocked&lt;br /&gt;
|-&lt;br /&gt;
| 0x2F&lt;br /&gt;
| 47&lt;br /&gt;
| Resource unavailable, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x31&lt;br /&gt;
| 49&lt;br /&gt;
| Quality of service unavailable&lt;br /&gt;
|-&lt;br /&gt;
| 0x32&lt;br /&gt;
| 50&lt;br /&gt;
| Requested facility not subscribed&lt;br /&gt;
|-&lt;br /&gt;
| 0x33&lt;br /&gt;
| 51&lt;br /&gt;
| Reverse charging not allowed&lt;br /&gt;
|-&lt;br /&gt;
| 0x34&lt;br /&gt;
| 52&lt;br /&gt;
| Outgoing calls barred&lt;br /&gt;
|-&lt;br /&gt;
| 0x35&lt;br /&gt;
| 53&lt;br /&gt;
| Outgoing calls barred within CUG&lt;br /&gt;
|-&lt;br /&gt;
| 0x36&lt;br /&gt;
| 54&lt;br /&gt;
| Incoming calls barred&lt;br /&gt;
|-&lt;br /&gt;
| 0x37&lt;br /&gt;
| 55&lt;br /&gt;
| Incoming calls barred within CUG&lt;br /&gt;
|-&lt;br /&gt;
| 0x38&lt;br /&gt;
| 56&lt;br /&gt;
| Call waiting not subscribed&lt;br /&gt;
|-&lt;br /&gt;
| 0x39&lt;br /&gt;
| 57&lt;br /&gt;
| Bearer capability not authorized&lt;br /&gt;
|-&lt;br /&gt;
| 0x3A&lt;br /&gt;
| 58&lt;br /&gt;
| Bearer capability not presently available&lt;br /&gt;
|-&lt;br /&gt;
| 0x3F&lt;br /&gt;
| 63&lt;br /&gt;
| Service or option not available, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x41&lt;br /&gt;
| 65&lt;br /&gt;
| Bearer service not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x42&lt;br /&gt;
| 66&lt;br /&gt;
| Channel type not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x43&lt;br /&gt;
| 67&lt;br /&gt;
| Transit network selection not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x44&lt;br /&gt;
| 68&lt;br /&gt;
| Message not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x45&lt;br /&gt;
| 69&lt;br /&gt;
| Requested facility not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x46&lt;br /&gt;
| 70&lt;br /&gt;
| Only restricted digital information bearer capability is available&lt;br /&gt;
|-&lt;br /&gt;
| 0x4F&lt;br /&gt;
| 79&lt;br /&gt;
| Service or option not implemented, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x51&lt;br /&gt;
| 81&lt;br /&gt;
| Invalid call reference value&lt;br /&gt;
|-&lt;br /&gt;
| 0x52&lt;br /&gt;
| 82&lt;br /&gt;
| Identified channel does not exist&lt;br /&gt;
|-&lt;br /&gt;
| 0x53&lt;br /&gt;
| 83&lt;br /&gt;
| A suspended call exists, but this call identity does not&lt;br /&gt;
|-&lt;br /&gt;
| 0x54&lt;br /&gt;
| 84&lt;br /&gt;
| Call identity in use&lt;br /&gt;
|-&lt;br /&gt;
| 0x55&lt;br /&gt;
| 85&lt;br /&gt;
| No call suspended&lt;br /&gt;
|-&lt;br /&gt;
| 0x56&lt;br /&gt;
| 86&lt;br /&gt;
| Call having the requested call identity has been cleared&lt;br /&gt;
|-&lt;br /&gt;
| 0x57&lt;br /&gt;
| 87&lt;br /&gt;
| Called user not member of CUG&lt;br /&gt;
|-&lt;br /&gt;
| 0x58&lt;br /&gt;
| 88&lt;br /&gt;
| Incompatible destination&lt;br /&gt;
|-&lt;br /&gt;
| 0x59&lt;br /&gt;
| 89&lt;br /&gt;
| Non-existent abbreviated address entry&lt;br /&gt;
|-&lt;br /&gt;
| 0x5A&lt;br /&gt;
| 90&lt;br /&gt;
| Destination address missing, and direct call not subscribed&lt;br /&gt;
|-&lt;br /&gt;
| 0x5B&lt;br /&gt;
| 91&lt;br /&gt;
| Invalid transit network selection (national use)&lt;br /&gt;
|-&lt;br /&gt;
| 0x5C&lt;br /&gt;
| 92&lt;br /&gt;
| Invalid facility parameter 93 Mandatory information element is missing&lt;br /&gt;
|-&lt;br /&gt;
| 0x5D&lt;br /&gt;
| 93&lt;br /&gt;
| Message type non-existent or not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x5F&lt;br /&gt;
| 95&lt;br /&gt;
| Invalid message, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x60&lt;br /&gt;
| 96&lt;br /&gt;
| Mandatory information element is missing&lt;br /&gt;
|-&lt;br /&gt;
| 0x61&lt;br /&gt;
| 97&lt;br /&gt;
| Message type non-existent or not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x62&lt;br /&gt;
| 98&lt;br /&gt;
| Message not compatible with call state or message type non-existent or not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x63&lt;br /&gt;
| 99&lt;br /&gt;
| Information element nonexistent or not implemented&lt;br /&gt;
|-&lt;br /&gt;
| 0x64&lt;br /&gt;
| 100&lt;br /&gt;
| Invalid information element contents&lt;br /&gt;
|-&lt;br /&gt;
| 0x65&lt;br /&gt;
| 101&lt;br /&gt;
| Message not compatible with call state&lt;br /&gt;
|-&lt;br /&gt;
| 0x66&lt;br /&gt;
| 102&lt;br /&gt;
| Recovery on timer expiry&lt;br /&gt;
|-&lt;br /&gt;
| 0x67&lt;br /&gt;
| 103&lt;br /&gt;
| Parameter non-existent or not implemented – passed on&lt;br /&gt;
|-&lt;br /&gt;
| 0x6F&lt;br /&gt;
| 111&lt;br /&gt;
| Protocol error, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x7F&lt;br /&gt;
| 127&lt;br /&gt;
| Internetworking, unspecified&lt;br /&gt;
|-&lt;br /&gt;
| 0x80+&lt;br /&gt;
| 128 or&lt;br /&gt;
higher&lt;br /&gt;
| Proprietary diagnostic code (not necessarily bad). Typically used to pass proprietary control or maintenance messages between multiplexers.&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Administrator</name></author>
	</entry>
</feed>