Symmetric NAT Traversal - Revision history

Luc Morissette: Added 3.3 links

2025-08-21T14:16:25Z

Added 3.3 links

← Older revision		Revision as of 10:16, 21 August 2025
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	*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]		*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]
	<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">		<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">
			*
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
	*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]

Luc Morissette: /* Configuration */

2025-08-21T14:15:22Z

Configuration

← Older revision		Revision as of 10:15, 21 August 2025
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	\|-		\|-
	\| valign="top" \|		\| valign="top" \|
			*[[Toolpack:Tsbc_IP_Network_Settings_3.3#tab=NAT\|Configure NAT Traversal 3.3]]
	*[[Toolpack:Tsbc_IP_Network_Settings_3.1#tab=NAT\|Configure NAT Traversal 3.1]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.1#tab=NAT\|Configure NAT Traversal 3.1]]
			\| valign="top" \|
			*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]
			<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
	~~\| valign="top" \|~~
	*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2]]
	*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
	~~<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">~~
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]

Luc Morissette: /* Configuration */

2022-04-11T20:27:30Z

Configuration

← Older revision		Revision as of 16:27, 11 April 2022
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	{\| cellpadding="5" border="1" class="wikitable"		{\| cellpadding="5" border="1" class="wikitable"
	\|-		\|-
	! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| ~~FreeSBC~~		! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| ProSBC
	! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| Tmedia~~/Tsig/Tdev~~		! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| Tmedia
	\|-		\|-
	\| valign="top" \|		\| valign="top" \|

Luc Morissette: /* Configuration */

2022-04-11T20:27:01Z

Configuration

← Older revision		Revision as of 16:27, 11 April 2022
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	\|-		\|-
	\| valign="top" \|		\| valign="top" \|
			*[[Toolpack:Tsbc_IP_Network_Settings_3.1#tab=NAT\|Configure NAT Traversal 3.1]]
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
	\| valign="top" \|		\| valign="top" \|
			*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2]]
	*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
			<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]
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	*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]
	*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]
			</div>
	\|}		\|}

	== External Sources ==		== External Sources ==
	* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)		* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)
	<br>		<br>

Luc Morissette: Updated title

2020-02-27T22:13:17Z

Updated title

← Older revision		Revision as of 18:13, 27 February 2020
Line 1:		Line 1:
			{{DISPLAYTITLE:NAT Traversal}}

	=== '''''Applies to version(s): v3.0''''' ===		=== '''''Applies to version(s): v3.0''''' ===

	SBC/Tmedia supports NAT (Network Address Translation) Traversal.		SBC/Tmedia supports NAT (Network Address Translation) Traversal.
	<br><br>		<br><br>

	== Symmetric NAT Traversal==		== Symmetric NAT Traversal==
	A Network Address Translation (NAT) has many functions such as: firewall, and hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports that are allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. A correct configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are two cases of NAT traversal: "Active NAT Traversal" where TSB/Tmedia is behind a NAT and "Passive NAT Traversal" where the client is behind a NAT. A ''Symmetric NAT Traversal'' is the process that sends the replied message back to the same '''public IP/Port''' where the message came from.		A Network Address Translation (NAT) has many functions such as: firewall, and hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports that are allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. A correct configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are two cases of NAT traversal: "Active NAT Traversal" where TSB/Tmedia is behind a NAT and "Passive NAT Traversal" where the client is behind a NAT.


			A ''Symmetric NAT Traversal'' is the process that sends the replied message back to the same '''public IP/Port''' where the message came from.

	=== TelcoBridges and Active NAT Traversal ===		=== TelcoBridges and Active NAT Traversal ===

Allyntree: Needs revising edit

2018-04-24T19:21:24Z

Needs revising edit

← Older revision		Revision as of 15:21, 24 April 2018
Line 4:		Line 4:

	== Symmetric NAT Traversal==		== Symmetric NAT Traversal==
	A Network Address Translation (NAT) has many functions such as: firewall, hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. ~~Thus, a right~~ configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are two cases of NAT traversal: "Active NAT Traversal" where TSB/Tmedia is behind a NAT and "Passive NAT Traversal" where the client is behind a NAT. A ''Symmetric NAT Traversal'' is the process that sends the replied message back to the same '''public IP/Port''' where the message came from.		A Network Address Translation (NAT) has many functions such as: firewall, and hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports that are allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. A correct configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are two cases of NAT traversal: "Active NAT Traversal" where TSB/Tmedia is behind a NAT and "Passive NAT Traversal" where the client is behind a NAT. A ''Symmetric NAT Traversal'' is the process that sends the replied message back to the same '''public IP/Port''' where the message came from.

	=== TelcoBridges and Active NAT Traversal ===		=== TelcoBridges and Active NAT Traversal ===
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	=== TelcoBridges and Passive NAT Traversal ===		=== TelcoBridges and Passive NAT Traversal ===
	SBC/Tmedia supports passive NAT Traversal ~~that~~ addresses the need of peer VoIP endpoint having a private network address. This endpoint device is situated behind a NAT device, e.g. Firewall, while the SBC/Tmedia VoIP port has a public IP address. For the passive mode, SBC/Tmedia detects the received RTP packet's source IP address and port. In response, SBC/Tmedia uses this source IP address and port as the packet destination for RTP.		SBC/Tmedia supports passive NAT Traversal, which addresses the need of peer VoIP endpoint having a private network address. This endpoint device is situated behind a NAT device, e.g. Firewall, while the SBC/Tmedia VoIP port has a public IP address. For the passive mode, SBC/Tmedia detects the received RTP packet's source IP address and port. In response, SBC/Tmedia uses this source IP address and port as the packet destination for RTP.

	This is also called Remote NAT traversal or far-end NAT traversal.		This is also called Remote NAT traversal or far-end NAT traversal.
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	# When a client (Bob) calls someone (Alice) located outside of the internal network, the messages need to get through the NAT which sends the messages to SBC/Tmedia.		# When a client (Bob) calls someone (Alice) located outside of the internal network, the messages need to get through the NAT which sends the messages to SBC/Tmedia.
	# After their reception, SBC/Tmedia processes and forwards the messages to Alice.		# After their reception, SBC/Tmedia processes and forwards the messages to Alice.
	# When SBC/Tmedia gets a reply from ~~the~~ Alice, it sends the answer back to the NAT.		# When SBC/Tmedia gets a reply from Alice, it sends the answer back to the NAT.
	# The NAT checks if the received messages from SBC/Tmedia are allowed to be forwarded to Bob.		# The NAT checks if the received messages from SBC/Tmedia are allowed to be forwarded to Bob.
	<br />		<br />
	Bob's IP can only be used in the internal network. When SBC/Tmedia needs to send the Alice's messages to Bob, the message cannot be dispatched directly to the internal IP of Bob or any other IP closed by the NAT. Usually, a replied message is transmitted to the same IP/Port of the NAT where the previous message ~~came from~~. In this case, SBC/Tmedia sends Alice's messages to the public IP of the NAT~~. Then,~~ the NAT maps back the message to Bob's internal IP. This is called a ''symmetric response''.		Bob's IP can only be used in the internal network. When SBC/Tmedia needs to send the Alice's messages to Bob, the message cannot be dispatched directly to the internal IP of Bob or any other IP closed by the NAT. Usually, a replied message is transmitted to the same IP/Port of the NAT from where the previous message originated. In this case, SBC/Tmedia sends Alice's messages to the public IP of the NAT and the NAT maps back the message to Bob's internal IP. This is called a ''symmetric response''.
	<br />		<br />
	<br />		<br />
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	A call always begins and ends with a SIP traversal (before and after the media transmission). The media is transmitted through RTP.<br />		A call always begins and ends with a SIP traversal (before and after the media transmission). The media is transmitted through RTP.<br />

	In a User Datagram Protocol (UDP), a SIP traversal through the NAT ~~can be resumed~~ as follows:<br />		In a User Datagram Protocol (UDP), a SIP traversal through the NAT is shown as follows:<br />
	[[File:Passive_Nat_Traversal_Sip_Sequence_Call.jpg\|600px\|Figure 2: SIP Traversal Through NAT over UDP]]		[[File:Passive_Nat_Traversal_Sip_Sequence_Call.jpg\|600px\|Figure 2: SIP Traversal Through NAT over UDP]]
	<br />		<br />
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	* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)		* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)
	<br>		<br>

	~~[[Category:Needs revising]]~~

Cbilodeau: convert link list to table

2018-04-10T17:18:21Z

convert link list to table

← Older revision		Revision as of 13:18, 10 April 2018
Line 88:		Line 88:

	== Configuration ==		== Configuration ==
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal ~~for version~~ 3.0]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal ~~for version~~ 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal ~~for version~~ 2.9]]
	*[[Create_NAT_Traversal_A\|Configure NAT Traversal ~~for version~~ 2.8]]		{\| cellpadding="5" border="1" class="wikitable"
			\|-
			! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| FreeSBC
			! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| Tmedia/Tsig/Tdev
			\|-
			\| valign="top" \|
			*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
			\| valign="top" \|
			*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
			*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
			*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]
			*[[Create_NAT_Traversal_A\|Configure NAT Traversal 2.8]]
	*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]
	*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]
			\|}
	== External Sources ==		== External Sources ==
	* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)		* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)

Cbilodeau: change configuration link to 3.0

2018-04-09T18:23:11Z

change configuration link to 3.0

← Older revision		Revision as of 14:23, 9 April 2018
Line 88:		Line 88:

	== Configuration ==		== Configuration ==
	*[[~~Create_NAT_Traversal_C~~\|Configure NAT Traversal for version 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal for version 3.0]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal for version 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal for version 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal for version 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal for version 2.9]]

Mohamad Badreddine at 16:23, 9 April 2018

2018-04-09T16:23:19Z

← Older revision		Revision as of 12:23, 9 April 2018
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	Content-Length: ...		Content-Length: ...
	[Session Description Protocol not shown]		[Session Description Protocol not shown]
	~~<br />~~
	~~== Automatic Detection ==~~
	SBC/Tmedia is able to automatically detect if the client is behind a NAT. To ensure a correct SIP traversal, the automatic detection feature can be activated in the NAP configuration as follows:<br /><br />

	~~[[File:Symetric_NAT_Traversal_SIP_Menu_Automatic.jpg]]~~
	~~<br />~~
	<br />		<br />

Mohamad Badreddine at 15:58, 9 April 2018

2018-04-09T15:58:42Z

← Older revision		Revision as of 11:58, 9 April 2018
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	<br><br>		<br><br>

	== ~~Network Address Translation~~ Traversal==		== Symmetric NAT Traversal==
	A Network Address Translation (NAT) has many functions such as: firewall, hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. Thus, a right configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are ~~three~~ cases of NAT traversal: ~~active~~ NAT ~~traversal~~ where TSB/Tmedia is behind a NAT~~, passive~~ NAT ~~traversal~~ where the client is behind a NAT~~, and~~ the ~~case~~ where ~~both~~ the ~~client and SBC/Tmedia are each behind a different NAT~~.		A Network Address Translation (NAT) has many functions such as: firewall, hiding the client IP. Usually, a NAT limits the number of "opened" IPs/Ports allowed to communicate with the internal network and ignores all messages sent to the "closed" IPs/Ports. Thus, a right configuration of TSB/Tmedia allows the messages to reach a client behind a NAT, also known as ''NAT Traversal''. There are two cases of NAT traversal: "Active NAT Traversal" where TSB/Tmedia is behind a NAT and "Passive NAT Traversal" where the client is behind a NAT. A ''Symmetric NAT Traversal'' is the process that sends the replied message back to the same '''public IP/Port''' where the message came from.

	=== TelcoBridges and Active NAT Traversal ===		=== TelcoBridges and Active NAT Traversal ===

← Older revision		Revision as of 10:16, 21 August 2025
Line 108:		Line 108:
	*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]		*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]
	<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">		<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">
			*
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
	*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]

← Older revision		Revision as of 10:15, 21 August 2025
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	\|-		\|-
	\| valign="top" \|		\| valign="top" \|
			*[[Toolpack:Tsbc_IP_Network_Settings_3.3#tab=NAT\|Configure NAT Traversal 3.3]]
	*[[Toolpack:Tsbc_IP_Network_Settings_3.1#tab=NAT\|Configure NAT Traversal 3.1]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.1#tab=NAT\|Configure NAT Traversal 3.1]]
			\| valign="top" \|
			*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2 and 3.3]]
			<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
	~~\| valign="top" \|~~
	*[[Toolpack:Hardware_Settings_E#tab=NAT\|Configure NAT Traversal 3.2]]
	*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]		*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
	~~<div class="mw-collapsible mw-collapsed" data-collapsetext="other versions" data-expandtext="Click here for other versions" style="width: 400px;">~~
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]		*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]

← Older revision		Revision as of 13:18, 10 April 2018
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	== Configuration ==		== Configuration ==
	*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal ~~for version~~ 3.0]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal ~~for version~~ 2.10]]
	*[[Create_NAT_Traversal_B\|Configure NAT Traversal ~~for version~~ 2.9]]
	*[[Create_NAT_Traversal_A\|Configure NAT Traversal ~~for version~~ 2.8]]		{\| cellpadding="5" border="1" class="wikitable"
			\|-
			! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| FreeSBC
			! width="200" style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" \| Tmedia/Tsig/Tdev
			\|-
			\| valign="top" \|
			*[[Toolpack:Tsbc_IP_Network_Settings_3.0#NAT\|Configure NAT Traversal 3.0]]
			\| valign="top" \|
			*[[Toolpack:Hardware_Settings_D#NAT\|Configure NAT Traversal 3.0]]
			*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.10]]
			*[[Create_NAT_Traversal_B\|Configure NAT Traversal 2.9]]
			*[[Create_NAT_Traversal_A\|Configure NAT Traversal 2.8]]
	*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.7#SIP Advanced Features\|Toolpack v2.7: SIP Advance Features]]
	*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]		*[[Web_Portal_Tutorial_Guide_v2.6#SIP Advanced Features\|Toolpack v2.6: SIP Advance Features]]
			\|}
	== External Sources ==		== External Sources ==
	* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)		* RFC 4961 Symmetric RTP / RTP Control Protocol (RTCP)