<html>਀ 
<head>਀㰀洀攀琀愀 栀琀琀瀀ⴀ攀焀甀椀瘀㴀䌀漀渀琀攀渀琀ⴀ吀礀瀀攀 挀漀渀琀攀渀琀㴀∀琀攀砀琀⼀栀琀洀氀㬀 挀栀愀爀猀攀琀㴀甀渀椀挀漀搀攀∀㸀 
<meta name=Generator content="Microsoft Word 12 (filtered)">਀㰀猀琀礀氀攀㸀 
<!--਀䐀䤀嘀嬀挀氀愀猀猀㴀∀倀愀爀琀∀崀 笀 
 text-align:left;਀ 洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　瀀砀㬀 
 margin-top:0px;਀ 洀愀爀最椀渀ⴀ爀椀最栀琀㨀　瀀砀㬀 
 text-indent:0px;਀ 搀椀爀攀挀琀椀漀渀㨀氀琀爀 
}਀䐀䤀嘀嬀挀氀愀猀猀㴀∀匀攀挀琀∀崀 笀 
 text-align:left;਀ 洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　瀀砀㬀 
 margin-top:0px;਀ 洀愀爀最椀渀ⴀ爀椀最栀琀㨀　瀀砀㬀 
 text-indent:0px;਀ 搀椀爀攀挀琀椀漀渀㨀氀琀爀 
}਀琀愀戀氀攀 
	{display:table;਀ऀ昀氀漀愀琀㨀渀漀渀攀㬀紀 
਀ ⼀⨀ 䘀漀渀琀 䐀攀昀椀渀椀琀椀漀渀猀 ⨀⼀ 
 @font-face਀ऀ笀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䌀愀洀戀爀椀愀 䴀愀琀栀∀㬀 
	panose-1:2 4 5 3 5 4 6 3 2 4;}਀ ⼀⨀ 匀琀礀氀攀 䐀攀昀椀渀椀琀椀漀渀猀 ⨀⼀ 
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	margin-bottom:.0001pt;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㈀⸀　瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀紀 
h3਀ऀ笀洀猀漀ⴀ猀琀礀氀攀ⴀ氀椀渀欀㨀∀�戀攀爀猀挀栀爀椀昀琀 ㌀ 娀挀栀渀∀㬀 
	margin-top:0cm;਀ऀ洀愀爀最椀渀ⴀ爀椀最栀琀㨀　挀洀㬀 
	margin-bottom:3.75pt;਀ऀ洀愀爀最椀渀ⴀ氀攀昀琀㨀　挀洀㬀 
	line-height:18.0pt;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㌀⸀㔀瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀 
	font-weight:bold;}਀栀㐀 
	{mso-style-link:"Überschrift 4 Zchn";਀ऀ洀愀爀最椀渀ⴀ琀漀瀀㨀　挀洀㬀 
	margin-right:0cm;਀ऀ洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀㌀⸀㜀㔀瀀琀㬀 
	margin-left:0cm;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㈀⸀　瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀 
	font-weight:bold;}਀栀㔀 
	{mso-style-link:"Überschrift 5 Zchn";਀ऀ洀愀爀最椀渀㨀　挀洀㬀 
	margin-bottom:.0001pt;਀ऀ氀椀渀攀ⴀ栀攀椀最栀琀㨀㄀㈀⸀㜀㔀瀀琀㬀 
	font-size:10.0pt;਀ऀ昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀Ⰰ∀猀攀爀椀昀∀㬀 
	color:black;਀ऀ昀漀渀琀ⴀ眀攀椀最栀琀㨀戀漀氀搀㬀紀 
a:link, span.MsoHyperlink਀ऀ笀挀漀氀漀爀㨀戀氀甀攀㬀 
	text-decoration:underline;}਀愀㨀瘀椀猀椀琀攀搀Ⰰ 猀瀀愀渀⸀䴀猀漀䠀礀瀀攀爀氀椀渀欀䘀漀氀氀漀眀攀搀 
	{color:purple;਀ऀ琀攀砀琀ⴀ搀攀挀漀爀愀琀椀漀渀㨀甀渀搀攀爀氀椀渀攀㬀紀 
p਀ऀ笀洀愀爀最椀渀㨀　挀洀㬀 
	margin-bottom:.0001pt;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㈀⸀　瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀紀 
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph਀ऀ笀洀愀爀最椀渀ⴀ琀漀瀀㨀　挀洀㬀 
	margin-right:0cm;਀ऀ洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　挀洀㬀 
	margin-left:36.0pt;਀ऀ洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀⸀　　　㄀瀀琀㬀 
	font-size:12.0pt;਀ऀ昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀Ⰰ∀猀攀爀椀昀∀㬀 
	color:black;}਀瀀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀Ⰰ 氀椀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀Ⰰ 搀椀瘀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀 
	{margin-top:0cm;਀ऀ洀愀爀最椀渀ⴀ爀椀最栀琀㨀　挀洀㬀 
	margin-bottom:0cm;਀ऀ洀愀爀最椀渀ⴀ氀攀昀琀㨀㌀㘀⸀　瀀琀㬀 
	margin-bottom:.0001pt;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㈀⸀　瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀紀 
p.MsoListParagraphCxSpMiddle, li.MsoListParagraphCxSpMiddle, div.MsoListParagraphCxSpMiddle਀ऀ笀洀愀爀最椀渀ⴀ琀漀瀀㨀　挀洀㬀 
	margin-right:0cm;਀ऀ洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　挀洀㬀 
	margin-left:36.0pt;਀ऀ洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀⸀　　　㄀瀀琀㬀 
	font-size:12.0pt;਀ऀ昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀Ⰰ∀猀攀爀椀昀∀㬀 
	color:black;}਀瀀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䰀愀猀琀Ⰰ 氀椀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䰀愀猀琀Ⰰ 搀椀瘀⸀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䰀愀猀琀 
	{margin-top:0cm;਀ऀ洀愀爀最椀渀ⴀ爀椀最栀琀㨀　挀洀㬀 
	margin-bottom:0cm;਀ऀ洀愀爀最椀渀ⴀ氀攀昀琀㨀㌀㘀⸀　瀀琀㬀 
	margin-bottom:.0001pt;਀ऀ昀漀渀琀ⴀ猀椀稀攀㨀㄀㈀⸀　瀀琀㬀 
	font-family:"Times New Roman","serif";਀ऀ挀漀氀漀爀㨀戀氀愀挀欀㬀紀 
span.berschrift3Zchn਀ऀ笀洀猀漀ⴀ猀琀礀氀攀ⴀ渀愀洀攀㨀∀�戀攀爀猀挀栀爀椀昀琀 ㌀ 娀挀栀渀∀㬀 
	mso-style-link:"Überschrift 3";਀ऀ昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䌀愀洀戀爀椀愀∀Ⰰ∀猀攀爀椀昀∀㬀 
	color:#4F81BD;਀ऀ昀漀渀琀ⴀ眀攀椀最栀琀㨀戀漀氀搀㬀紀 
span.berschrift4Zchn਀ऀ笀洀猀漀ⴀ猀琀礀氀攀ⴀ渀愀洀攀㨀∀�戀攀爀猀挀栀爀椀昀琀 㐀 娀挀栀渀∀㬀 
	mso-style-link:"Überschrift 4";਀ऀ昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䌀愀洀戀爀椀愀∀Ⰰ∀猀攀爀椀昀∀㬀 
	color:#4F81BD;਀ऀ昀漀渀琀ⴀ眀攀椀最栀琀㨀戀漀氀搀㬀 
	font-style:italic;}਀猀瀀愀渀⸀戀攀爀猀挀栀爀椀昀琀㔀娀挀栀渀 
	{mso-style-name:"Überschrift 5 Zchn";਀ऀ洀猀漀ⴀ猀琀礀氀攀ⴀ氀椀渀欀㨀∀�戀攀爀猀挀栀爀椀昀琀 㔀∀㬀 
	font-family:"Cambria","serif";਀ऀ挀漀氀漀爀㨀⌀㈀㐀㌀䘀㘀　㬀紀 
.MsoChpDefault਀ऀ笀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀紀 
@page Section1਀ऀ笀猀椀稀攀㨀㔀㤀㔀⸀㌀瀀琀 㠀㐀㄀⸀㤀瀀琀㬀 
	margin:70.85pt 70.85pt 2.0cm 70.85pt;}਀搀椀瘀⸀匀攀挀琀椀漀渀㄀ 
	{page:Section1;}਀ ⼀⨀ 䰀椀猀琀 䐀攀昀椀渀椀琀椀漀渀猀 ⨀⼀ 
 ol਀ऀ笀洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　挀洀㬀紀 
ul਀ऀ笀洀愀爀最椀渀ⴀ戀漀琀琀漀洀㨀　挀洀㬀紀 
-->਀㰀⼀猀琀礀氀攀㸀 
਀㰀洀攀琀愀 渀愀洀攀㴀搀挀⸀搀愀琀攀 挀漀渀琀攀渀琀㴀∀㈀　　㤀ⴀ　㄀ⴀ㈀㠀吀㄀㌀㨀㌀㤀㨀㔀㌀娀∀㸀 
<meta name=dc.date.modified content="2009-01-28T13:39:53+01:00">਀㰀⼀栀攀愀搀㸀 
਀㰀戀漀搀礀 戀最挀漀氀漀爀㴀眀栀椀琀攀 氀愀渀最㴀䐀䔀 氀椀渀欀㴀戀氀甀攀 瘀氀椀渀欀㴀瀀甀爀瀀氀攀 愀氀椀渀欀㴀昀甀猀栀椀愀㸀 
਀㰀搀椀瘀 挀氀愀猀猀㴀匀攀挀琀椀漀渀㄀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀㐀⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀 
"Arial","sans-serif"'>Gigaset VoIP telephones behind various routers with਀一攀琀眀漀爀欀 䄀搀搀爀攀猀猀 吀爀愀渀猀氀愀琀椀漀渀 ⠀一䄀吀⤀ 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀㐀⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀 
"Arial","sans-serif"'>&nbsp;</span></b></p>਀ 
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>NAT਀挀漀渀猀琀椀琀甀琀攀猀 愀 戀愀猀椀挀 漀戀猀琀愀挀氀攀 琀漀 嘀漀䤀倀 琀攀氀攀瀀栀漀渀礀⸀ 吀礀瀀椀挀愀氀 攀爀爀漀爀 瀀愀琀琀攀爀渀猀 挀愀甀猀攀搀 
by NAT are: </span></p>਀ 
<p class=MsoListParagraphCxSpFirst style='text-indent:-18.0pt'><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㄀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䄀戀猀攀渀挀攀 漀昀 
speech paths, sometimes partial paths </span></p>਀ 
<p class=MsoListParagraphCxSpMiddle style='text-indent:-18.0pt'><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㈀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䤀渀挀漀洀椀渀最 
calls not possible </span></p>਀ 
<p class=MsoListParagraphCxSpLast style='text-indent:-18.0pt'><span lang=EN-US਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㌀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀伀甀琀最漀椀渀最 
calls unsuccessful </span></p>਀ 
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span></p>਀ 
<div>਀ 
<p class=MsoNormal><b><span lang=EN-US style='font-family:"Arial","sans-serif"'>Preferred਀倀漀爀琀ⴀ 愀渀搀 刀漀甀琀攀爀ⴀ䌀漀渀昀椀最甀爀愀琀椀漀渀 椀渀 挀愀猀攀 漀昀 一䄀吀 倀爀漀戀氀攀洀猀 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀唀猀甀愀氀氀礀 
there is no special router configuration required to run Gigaset VoIP phones਀戀攀栀椀渀搀 一䄀吀⸀ 䈀甀琀 椀昀 琀栀攀爀攀 愀爀攀 攀爀爀漀爀 瀀愀琀琀攀爀渀猀Ⰰ 猀甀挀栀 愀猀 搀攀猀挀爀椀戀攀搀 愀戀漀瘀攀Ⰰ 琀栀攀礀 
often could be fixed by selecting exclusive SIP and RTP port numbers in the਀䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀⸀ 䤀渀 猀漀洀攀 挀愀猀攀猀 椀琀 洀椀最栀琀 愀搀搀椀琀椀漀渀愀氀氀礀 戀攀 渀攀挀攀猀猀愀爀礀 琀漀 瀀爀漀最爀愀洀 
Port forwarding rules for these ports in the router: </span></p>਀ 
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span></p>਀ 
<p class=MsoListParagraph style='text-indent:-18.0pt'><span lang=EN-US਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㄀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀唀猀攀 
exclusive Port Numbers for SIP and RTP in the Gigaset VoIP phone: Especially if਀琀栀攀爀攀 愀爀攀 愀搀搀椀琀椀漀渀愀氀 嘀漀䤀倀 瀀栀漀渀攀猀 椀渀 琀栀攀 䰀䄀一Ⰰ 椀琀 洀椀最栀琀 栀攀氀瀀 琀漀 挀栀漀漀猀攀 瀀漀爀琀 
numbers, which are not used by any other host or application in the LAN and਀眀栀椀挀栀 愀爀攀 昀愀爀 愀眀愀礀 昀爀漀洀 琀栀攀 搀攀昀愀甀氀琀 匀䤀倀 愀渀搀 刀吀倀 瀀漀爀琀猀 ⠀攀⸀最⸀ 爀愀渀搀漀洀 渀甀洀戀攀爀猀 昀爀漀洀 
1024 up to 49152). You need to know, that RTP protocol uses the preconfigured਀刀吀倀 戀愀猀攀 瀀漀爀琀 渀甀洀戀攀爀 ⠀攀⸀最⸀ 㔀　　㐀⤀ 愀渀搀 琀栀攀 渀攀砀琀 琀眀漀 攀瘀攀渀 瀀漀爀琀 渀甀洀戀攀爀猀 ⠀攀⸀最⸀ 㔀　　㘀 
and 5008). In the latest software releases you can configure a range of RTP਀瀀漀爀琀猀⸀ 䄀猀 礀漀甀 渀攀攀搀 琀漀 爀攀洀攀洀戀攀爀 琀栀攀猀攀 瀀漀爀琀 渀甀洀戀攀爀猀 昀漀爀 爀漀甀琀攀爀 挀漀渀昀椀最甀爀愀琀椀漀渀Ⰰ 礀漀甀 
could choose numbers, which are quiet similar to the default settings, e.g.: </span></p>਀ 
<p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀匀䤀倀㨀 ꀀꀀꀀꀀ 㐀㤀　㘀　 ꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀꀀ 椀渀猀琀攀愀搀 
of 5060 </span></p>਀ 
<p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀刀吀倀㨀 ꀀꀀꀀ 㐀㤀　　㐀 ⠀甀瀀 琀漀 
49008 )     instead of 5004 (up to 5008) </span></p>਀ 
<p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 猀琀礀氀攀㴀✀洀愀爀最椀渀ⴀ氀攀昀琀㨀㌀㔀⸀㐀瀀琀✀㸀㰀戀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Recommended procedure਀琀漀 挀栀愀渀最攀 匀䤀倀 愀渀搀 刀吀倀 瀀漀爀琀猀㨀 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀 猀琀礀氀攀㴀✀洀愀爀最椀渀ⴀ氀攀昀琀㨀㔀㌀⸀㐀瀀琀㬀琀攀砀琀ⴀ椀渀搀攀渀琀㨀ⴀ㄀㠀⸀　瀀琀✀㸀㰀猀瀀愀渀 
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>1.<span਀猀琀礀氀攀㴀✀昀漀渀琀㨀㜀⸀　瀀琀 ∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀✀㸀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀 㰀⼀猀瀀愀渀㸀㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Change SIP਀愀渀搀 刀吀倀 瀀漀爀琀猀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䰀愀猀琀 猀琀礀氀攀㴀✀洀愀爀最椀渀ⴀ氀攀昀琀㨀㔀㌀⸀㐀瀀琀㬀琀攀砀琀ⴀ椀渀搀攀渀琀㨀ⴀ㄀㠀⸀　瀀琀✀㸀㰀猀瀀愀渀 
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>2.<span਀猀琀礀氀攀㴀✀昀漀渀琀㨀㜀⸀　瀀琀 ∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀✀㸀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀 㰀⼀猀瀀愀渀㸀㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Wait until਀愀挀琀椀瘀攀 匀䤀倀 愀挀挀漀甀渀琀猀 愀爀攀 爀攀最椀猀琀攀爀攀搀 愀最愀椀渀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ椀渀搀攀渀琀㨀㌀㔀⸀㐀瀀琀✀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span></p>਀ 
<p class=MsoListParagraphCxSpFirst style='text-indent:-18.0pt'><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㈀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><b><span਀氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀倀漀爀琀 
forwarding (or Port-mapping) </span></b></p>਀ 
<p class=MsoListParagraphCxSpLast><span lang=EN-US style='font-size:10.0pt;਀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䘀漀爀 琀栀攀猀攀 瀀漀爀琀 渀甀洀戀攀爀猀 漀昀 琀栀攀 䜀椀最愀猀攀琀 嘀漀䤀倀 
phones you need to program port forwarding rules in the router, to ensure, that਀琀栀攀猀攀 瀀漀爀琀 渀甀洀戀攀爀猀 愀爀攀 愀氀猀漀 礀漀甀 甀猀攀搀 愀琀 琀栀攀 圀䄀一 椀渀琀攀爀昀愀挀攀 眀椀琀栀 琀栀攀 瀀甀戀氀椀挀 䤀倀 
address. </span></p>਀ 
<div>਀ 
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=688਀ 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㔀㄀㘀⸀㄀㔀瀀琀㬀戀漀爀搀攀爀ⴀ挀漀氀氀愀瀀猀攀㨀挀漀氀氀愀瀀猀攀✀㸀 
 <tr style='height:9.75pt'>਀  㰀琀搀 眀椀搀琀栀㴀㘀㐀㐀 挀漀氀猀瀀愀渀㴀㘀 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㐀㠀㌀⸀　瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:9.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 猀琀礀氀攀㴀✀洀愀爀最椀渀ⴀ氀攀昀琀㨀㌀㔀⸀㐀瀀琀✀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀 
  font-family:"Arial","sans-serif"'>e.g.: </span></p>਀  㰀⼀琀搀㸀 
  <td style='border:none;padding:0cm 0cm 0cm 0cm' width=44><p class='MsoNormal'>&nbsp;</td>਀ 㰀⼀琀爀㸀 
 <tr style='height:12.75pt'>਀  㰀琀搀 猀琀礀氀攀㴀✀戀漀爀搀攀爀㨀渀漀渀攀㬀瀀愀搀搀椀渀最㨀　挀洀 　挀洀 　挀洀 　挀洀✀ 眀椀搀琀栀㴀㐀㐀㸀㰀瀀 挀氀愀猀猀㴀✀䴀猀漀一漀爀洀愀氀✀㸀☀渀戀猀瀀㬀㰀⼀琀搀㸀 
  <td width=117 valign=top style='width:87.75pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㄀㈀⸀㜀㔀瀀琀✀㸀 
  <p class=MsoNormal align=center style='text-align:center'><b><span਀  猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀倀爀漀琀漀挀漀氀 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㄀㠀 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㠀㠀⸀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:12.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀瀀甀戀氀椀挀 
  Port </span></b></p>਀  㰀⼀琀搀㸀 
  <td width=123 valign=top style='width:92.25pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㄀㈀⸀㜀㔀瀀琀✀㸀 
  <p class=MsoNormal align=center style='text-align:center'><b><span਀  猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀氀漀挀愀氀 倀漀爀琀 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㈀㠀㘀 挀漀氀猀瀀愀渀㴀㌀ 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㈀㄀㐀⸀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:12.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䠀漀猀琀 
  (IP-address) </span></b></p>਀  㰀⼀琀搀㸀 
 </tr>਀ 㰀琀爀 猀琀礀氀攀㴀✀栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀 
  <td style='border:none;padding:0cm 0cm 0cm 0cm' width=44><p class='MsoNormal'>&nbsp;</td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㄀㜀 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㠀㜀⸀㜀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:11.25pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 愀氀椀最渀㴀挀攀渀琀攀爀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ愀氀椀最渀㨀挀攀渀琀攀爀㬀氀椀渀攀ⴀ栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀㰀猀瀀愀渀 
  style='font-size:10.0pt;font-family:"Arial","sans-serif"'>UDP</span></p>਀  㰀⼀琀搀㸀 
  <td width=118 valign=top style='width:88.5pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀 
  <p class=MsoNormal style='line-height:11.25pt'><span style='font-size:10.0pt;਀  昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㐀㤀　㘀　 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㈀㌀ 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㤀㈀⸀㈀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:11.25pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 愀氀椀最渀㴀挀攀渀琀攀爀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ愀氀椀最渀㨀挀攀渀琀攀爀㬀氀椀渀攀ⴀ栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀㰀猀瀀愀渀 
  style='font-size:10.0pt;font-family:"Arial","sans-serif"'>49060 </span></p>਀  㰀⼀琀搀㸀 
  <td width=146 valign=top style='width:109.5pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀 
  <p class=MsoNormal style='line-height:11.25pt'><span style='font-size:10.0pt;਀  昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㄀㤀㈀⸀㄀㘀㠀⸀㈀⸀㄀　 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㐀　 挀漀氀猀瀀愀渀㴀㈀ 瘀愀氀椀最渀㴀琀漀瀀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㄀　㔀⸀　瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:11.25pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 猀琀礀氀攀㴀✀氀椀渀攀ⴀ栀攀椀最栀琀㨀㄀㄀⸀㈀㔀瀀琀✀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀 
  font-family:"Arial","sans-serif"'>for SIP </span></p>਀  㰀⼀琀搀㸀 
 </tr>਀ 㰀琀爀 猀琀礀氀攀㴀✀栀攀椀最栀琀㨀㤀⸀㜀㔀瀀琀✀㸀 
  <td style='border:none;padding:0cm 0cm 0cm 0cm' width=44><p class='MsoNormal'>&nbsp;</td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㄀㜀 瘀愀氀椀最渀㴀戀漀琀琀漀洀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㠀㜀⸀㜀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:9.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 愀氀椀最渀㴀挀攀渀琀攀爀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ愀氀椀最渀㨀挀攀渀琀攀爀✀㸀㰀猀瀀愀渀 
  style='font-size:10.0pt;font-family:"Arial","sans-serif"'>UDP</span></p>਀  㰀⼀琀搀㸀 
  <td width=118 valign=bottom style='width:88.5pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㤀⸀㜀㔀瀀琀✀㸀 
  <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>49004-49008਀  㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㈀㌀ 瘀愀氀椀最渀㴀戀漀琀琀漀洀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㤀㈀⸀㈀㔀瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:9.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀 愀氀椀最渀㴀挀攀渀琀攀爀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ愀氀椀最渀㨀挀攀渀琀攀爀✀㸀㰀猀瀀愀渀 
  style='font-size:10.0pt;font-family:"Arial","sans-serif"'>49004-49008 </span></p>਀  㰀⼀琀搀㸀 
  <td width=146 valign=bottom style='width:109.5pt;padding:2.25pt 2.25pt 2.25pt 2.25pt;਀  栀攀椀最栀琀㨀㤀⸀㜀㔀瀀琀✀㸀 
  <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>192.168.2.10਀  㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
  </td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㐀　 挀漀氀猀瀀愀渀㴀㈀ 瘀愀氀椀最渀㴀戀漀琀琀漀洀 猀琀礀氀攀㴀✀眀椀搀琀栀㨀㄀　㔀⸀　瀀琀㬀瀀愀搀搀椀渀最㨀㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀 ㈀⸀㈀㔀瀀琀㬀 
  height:9.75pt'>਀  㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀昀漀爀 
  RTP </span></p>਀  㰀⼀琀搀㸀 
 </tr>਀ 㰀琀爀 栀攀椀最栀琀㴀　㸀 
  <td width=44 style='border:none'></td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㄀㜀 猀琀礀氀攀㴀✀戀漀爀搀攀爀㨀渀漀渀攀✀㸀㰀⼀琀搀㸀 
  <td width=118 style='border:none'></td>਀  㰀琀搀 眀椀搀琀栀㴀㄀㈀㌀ 猀琀礀氀攀㴀✀戀漀爀搀攀爀㨀渀漀渀攀✀㸀㰀⼀琀搀㸀 
  <td width=146 style='border:none'></td>਀  㰀琀搀 眀椀搀琀栀㴀㤀㘀 猀琀礀氀攀㴀✀戀漀爀搀攀爀㨀渀漀渀攀✀㸀㰀⼀琀搀㸀 
  <td width=44 style='border:none'></td>਀ 㰀⼀琀爀㸀 
</table>਀ 
<p class=MsoNormal style='margin-left:35.4pt'><span style='font-size:10.0pt;਀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䤀渀 琀栀攀 氀愀琀攀猀琀 猀漀昀琀眀愀爀攀 爀攀氀攀愀猀攀猀 漀昀 䜀椀最愀猀攀琀 
VoIP phones you can configure a range of RTP ports. Then you also have to਀瀀爀漀最爀愀洀 瀀漀爀琀 昀漀爀眀愀爀搀椀渀最 爀甀氀攀猀 昀漀爀 琀栀椀猀 爀愀渀最攀 漀昀 刀吀倀 瀀漀爀琀猀⸀ 吀漀 愀氀氀漀眀 昀漀爀 猀甀挀栀 
port forwarding rules, the DHCP settings of the router must ensure, that the਀䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀 愀氀眀愀礀猀 最攀琀猀 琀栀攀 猀愀洀攀 氀漀挀愀氀 䤀倀 愀搀搀爀攀猀猀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀⼀搀椀瘀㸀 
਀㰀⼀搀椀瘀㸀 
਀㰀搀椀瘀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䈀愀挀欀最爀漀甀渀搀 
Information </span></b></p>਀ 
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Following਀礀漀甀 昀椀渀搀 昀甀爀琀栀攀爀 搀攀琀愀椀氀猀 愀戀漀甀琀 一䄀吀 琀爀愀瘀攀爀猀愀氀 漀昀 嘀漀䤀倀 琀爀愀昀昀椀挀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀匀吀唀一 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀吀栀攀 
STUN protocol is the preferred instrument of Gigaset VoIP telephones for਀漀瘀攀爀挀漀洀椀渀最 一䄀吀⸀ 䄀渀搀 椀渀 洀愀渀礀 挀愀猀攀猀 椀琀 椀猀 猀甀昀昀椀挀椀攀渀琀⸀ 䤀昀 琀栀攀 瀀爀漀戀氀攀洀猀 搀攀猀挀爀椀戀攀搀 
above arise even though the STUN protocol is activated, the deactivation of the਀匀吀唀一 瀀爀漀琀漀挀漀氀 椀猀 愀 甀猀攀昀甀氀 琀攀猀琀 昀漀爀 琀爀漀甀戀氀攀猀栀漀漀琀椀渀最⸀ 吀栀椀猀 洀攀愀猀甀爀攀 攀渀愀戀氀攀猀 愀渀礀 
&quot;helpers&quot; that are available in the router (SIP Application Layer਀䜀愀琀攀眀愀礀⤀ 漀爀 眀椀琀栀 琀栀攀 瀀爀漀瘀椀搀攀爀 ⠀匀䤀倀 倀爀漀砀礀 愀渀搀 刀吀倀 倀爀漀砀礀⤀ 琀漀 椀渀琀攀爀瘀攀渀攀 愀渀搀 
support NAT traversal. </span></p>਀ 
<div>਀ 
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>&nbsp;</span></b></p>਀ 
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>symmetric਀一䄀吀 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀吀栀攀爀攀 
is a so-called symmetric NAT, on which the STUN protocol does not work਀愀搀攀焀甀愀琀攀氀礀⸀ 䤀昀 愀 䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀 椀猀 挀漀渀渀攀挀琀攀搀 戀攀栀椀渀搀 愀 猀礀洀洀攀琀爀椀挀 一䄀吀Ⰰ 
although it can correctly ascertain the public IP address used for the VoIP਀瀀爀漀琀漀挀漀氀猀Ⰰ 椀琀 渀攀瘀攀爀琀栀攀氀攀猀猀 挀愀渀渀漀琀 愀猀挀攀爀琀愀椀渀 琀栀攀 瀀甀戀氀椀挀 瀀漀爀琀 洀愀瀀瀀椀渀最猀 琀栀愀琀 琀栀攀 
NAT will assign to the VoIP protocols. The Gigaset VoIP phone then assumes that਀琀栀攀 氀漀挀愀氀 瀀漀爀琀猀 猀攀琀 甀瀀 昀漀爀 匀䤀倀 愀渀搀 刀吀倀 愀氀猀漀 挀漀爀爀攀猀瀀漀渀搀 琀漀 琀栀攀椀爀 瀀甀戀氀椀挀 洀愀瀀瀀椀渀最⸀ 
But this is not necessarily the case. The user can make sure that it is,਀栀漀眀攀瘀攀爀Ⰰ 眀椀琀栀 琀栀攀 昀漀氀氀漀眀椀渀最 漀瀀琀椀漀渀猀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ椀渀搀攀渀琀㨀ⴀ㄀㠀⸀　瀀琀✀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>1.<span਀猀琀礀氀攀㴀✀昀漀渀琀㨀㜀⸀　瀀琀 ∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀✀㸀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀 㰀⼀猀瀀愀渀㸀㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Option: Port਀䘀漀爀眀愀爀搀椀渀最 刀甀氀攀猀㨀 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䴀椀搀搀氀攀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀 
font-family:"Arial","sans-serif"'>The user can generally program so-called Port਀䘀漀爀眀愀爀搀椀渀最 刀甀氀攀猀 椀渀 琀栀攀 爀漀甀琀攀爀Ⰰ 眀栀椀挀栀 攀渀猀甀爀攀 琀栀愀琀 琀栀攀 嘀漀䤀倀 瀀漀爀琀猀 甀猀攀搀 氀漀挀愀氀氀礀 
in the Gigaset (e.g. 5060 for SIP and 5004 and ff. for RTP) are mapped on the਀圀䄀一 猀椀搀攀 琀漀 琀栀攀 猀愀洀攀 瀀漀爀琀 渀甀洀戀攀爀猀⸀ 㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀 
font-family:"Arial","sans-serif"'>Only the base port can be set up for the RTP਀瀀漀爀琀 漀渀 琀栀攀 䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀⸀ 䐀攀瀀攀渀搀椀渀最 漀渀 琀栀攀 渀甀洀戀攀爀 漀昀 瀀愀爀愀氀氀攀氀 嘀漀䤀倀 挀愀氀氀猀 
supported, the subsequent even port numbers are used for RTP: 2 for devices that਀猀甀瀀瀀漀爀琀 漀渀攀 嘀漀䤀倀 挀愀氀氀Ⰰ ㌀ 昀漀爀 琀栀漀猀攀 琀栀愀琀 猀甀瀀瀀漀爀琀 琀眀漀 嘀漀䤀倀 挀愀氀氀猀 猀椀洀甀氀琀愀渀攀漀甀猀氀礀⸀ 
For example: 5004 is set up as the RTP port. Two parallel VoIP calls are਀猀甀瀀瀀漀爀琀攀搀⸀ 匀漀 㔀　　㐀Ⰰ 㔀　　㘀 愀渀搀 㔀　　㠀 愀爀攀 甀猀攀搀 愀猀 刀吀倀 瀀漀爀琀猀 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䴀椀搀搀氀攀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀 
"Arial","sans-serif"'>&nbsp;</span></p>਀ 
<p class=MsoListParagraphCxSpMiddle style='text-indent:-18.0pt'><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㈀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀伀瀀琀椀漀渀㨀 唀猀攀 漀昀 
exclusive ports for VoIP protocols </span></p>਀ 
<p class=MsoListParagraphCxSpLast><span lang=EN-US style='font-size:10.0pt;਀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀吀栀攀 甀猀攀爀 挀愀渀 猀攀琀 甀瀀 琀栀攀 嘀漀䤀倀 瀀漀爀琀猀 甀猀攀搀 
locally in the Gigaset (for SIP and RTP) in such a way that no other subscriber਀椀渀 琀栀攀 䰀䄀一 挀愀渀 甀猀攀 琀栀攀 猀愀洀攀 瀀漀爀琀猀⸀ 㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀 
font-family:"Arial","sans-serif"'>With many routers, although by no means all,਀琀栀攀 瀀漀爀琀猀 愀爀攀 渀漀琀 爀攀ⴀ洀愀瀀瀀攀搀 戀礀 琀栀攀 一䄀吀 椀渀 猀甀挀栀 挀愀猀攀猀Ⰰ 眀栀椀挀栀 洀攀愀渀猀 琀栀攀礀 洀攀攀琀 琀栀攀 
requirement that the locally set port numbers are also used on the WAN side. </span></p>਀ 
</div>਀ 
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>&nbsp;</span></b></p>਀ 
<p class=MsoNormal><b><span lang=EN-US style='font-family:"Arial","sans-serif"'>Ambiguous਀倀漀爀琀 一甀洀戀攀爀猀 眀椀琀栀椀渀 琀栀攀 䰀䄀一 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀匀漀洀攀 
NAT implementations have problems with forwarding traffic returning to the LAN਀琀漀 琀栀攀 挀漀爀爀攀挀琀 䰀䄀一 猀甀戀猀挀爀椀戀攀爀 椀昀 洀甀氀琀椀瀀氀攀 䰀䄀一 猀甀戀猀挀爀椀戀攀爀猀 愀爀攀 甀猀椀渀最 琀栀攀 猀愀洀攀 
port numbers for this. So for Gigaset VoIP telephones this behavior results in਀瀀爀漀戀氀攀洀猀 眀栀攀渀 昀甀爀琀栀攀爀 猀甀戀猀挀爀椀戀攀爀猀 椀渀 琀栀攀 䰀䄀一Ⰰ 攀猀瀀攀挀椀愀氀氀礀 嘀漀䤀倀 琀攀氀攀瀀栀漀渀攀猀 漀爀 
VoIP clients on connected PCs, are also using the port numbers set up on the਀䜀椀最愀猀攀琀 瀀栀漀渀攀 昀漀爀 匀䤀倀 愀渀搀 瀀漀爀琀 渀甀洀戀攀爀 爀愀渀最攀猀 昀漀爀 刀吀倀⸀ 䤀渀 琀栀椀猀 挀愀猀攀 椀琀 椀猀 
necessary to set up in the Gigaset VoIP phone exclusive port numbers (or port਀渀甀洀戀攀爀 爀愀渀最攀猀⤀ 昀漀爀 匀䤀倀 愀渀搀 刀吀倀Ⰰ 眀栀椀挀栀 渀漀 漀琀栀攀爀 䰀䄀一 猀甀戀猀挀爀椀戀攀爀 甀猀攀猀⸀ 䤀琀 眀漀甀氀搀 愀氀猀漀 
be possible to use the option of &quot;random port numbers&quot; for this, if਀氀愀琀攀猀琀 昀椀爀洀眀愀爀攀 爀攀氀攀愀猀攀 椀猀 椀渀猀琀愀氀氀攀搀⸀ 䘀漀爀 爀愀渀搀漀洀 瀀漀爀琀 渀甀洀戀攀爀猀 椀琀 椀猀 渀漀琀 
possible to program port forwarding rules in router. </span></p>਀ 
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>&nbsp;</span></b></p>਀ 
<p class=MsoNormal><b><span lang=EN-US style='font-family:"Arial","sans-serif"'>SIP-Application਀䰀愀礀攀爀 䜀愀琀攀眀愀礀 ⠀匀䤀倀ⴀ䄀䰀䜀⤀ 㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀伀昀琀攀渀 
there might be SIP-ALGs implemented in routers, which try to correct the effect਀漀昀 渀攀琀眀漀爀欀 愀搀搀爀攀猀猀 琀爀愀渀猀氀愀琀椀漀渀 椀渀 琀栀攀 匀䤀倀 瀀爀漀琀漀挀漀氀⸀ 䈀甀琀 匀䤀倀ⴀ䄀䰀䜀猀 挀愀渀 愀氀猀漀 戀攀 
troublesome in certain cases. This can be the case when older implementations਀洀漀搀椀昀礀 琀栀攀 匀䤀倀 瀀爀漀琀漀挀漀氀 椀渀 愀 眀愀礀 琀栀愀琀 搀漀攀猀 渀漀琀 挀漀洀瀀氀礀 眀椀琀栀 刀䘀䌀㌀㈀㘀㄀⸀ 䤀琀 挀愀渀 琀栀攀渀 
be helpful to deactivate a SIP-ALG in the router/gateway (rarely possible) or਀琀漀 挀椀爀挀甀洀瘀攀渀琀 琀栀攀 匀䤀倀ⴀ䄀䰀䜀⸀ 䌀椀爀挀甀洀瘀攀渀琀椀渀最 琀栀攀 匀䤀倀ⴀ䄀䰀䜀 椀猀 猀漀洀攀琀椀洀攀猀 瀀漀猀猀椀戀氀攀 戀礀 
setting up a local SIP server port for the Gigaset VoIP phone that is far਀爀攀洀漀瘀攀搀 昀爀漀洀 琀栀攀 挀漀渀瘀攀渀琀椀漀渀愀氀 匀䤀倀 瀀漀爀琀猀 ⠀㔀　㘀　Ⰰ 㔀　㘀㈀Ⰰ ☀⤠⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀搀椀瘀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䜀椀最愀猀攀琀 
VoIP phones with integrated Router </span></b></p>਀ 
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Gigaset਀嘀漀䤀倀 瀀栀漀渀攀猀 眀椀琀栀 椀渀琀攀最爀愀琀攀搀 刀漀甀琀攀爀 ⠀䌀䔀㐀㔀　 䤀倀 刀 愀渀搀 䄀䴀 瘀愀爀椀愀渀琀⤀ 愀爀攀 猀漀洀攀眀栀愀琀 
different from the other Gigaset VoIP telephones as far as NAT traversal਀猀琀爀愀琀攀最礀 椀猀 挀漀渀挀攀爀渀攀搀⸀ 䐀攀瀀攀渀搀椀渀最 漀渀 昀椀爀攀眀愀氀氀 猀攀琀琀椀渀最猀Ⰰ 琀栀攀 椀渀琀攀最爀愀琀攀搀 爀漀甀琀攀爀 
implements symmetric NAT. So STUN is not particularly suitable for NAT਀琀爀愀瘀攀爀猀愀氀⸀ 䤀渀猀琀攀愀搀Ⰰ 琀栀攀 椀渀琀攀最爀愀琀攀搀 爀漀甀琀攀爀 椀洀瀀氀攀洀攀渀琀猀 愀 匀䤀倀 䄀瀀瀀氀椀挀愀琀椀漀渀 䰀愀礀攀爀 
Gateway which helps the SIP and SDP protocol to overcome the influences of NAT.਀吀栀椀猀 眀漀爀欀猀 瘀攀爀礀 眀攀氀氀 愀猀 氀漀渀最 愀猀 琀栀攀 一䄀吀 漀昀 琀栀攀 椀渀琀攀最爀愀琀攀搀 爀漀甀琀攀爀 椀猀 琀栀攀 漀渀氀礀 
NAT that needs to be overcome (e.g. if the CE450 IP R is connected directly to਀愀 䐀匀䰀 洀漀搀攀洀⤀⸀ 匀栀漀甀氀搀 琀栀攀 䌀䔀㐀㔀　 䤀倀 刀 戀攀 椀渀猀琀愀氀氀攀搀 戀攀栀椀渀搀 愀渀漀琀栀攀爀 一䄀吀 
(router/gateway) however, this strategy no longer works. </span></p>਀ 
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span></p>਀ 
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The਀昀漀氀氀漀眀椀渀最 洀攀愀猀甀爀攀猀 愀爀攀 琀栀攀渀 爀攀焀甀椀爀攀搀㨀 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䘀椀爀猀琀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ椀渀搀攀渀琀㨀ⴀ㄀㠀⸀　瀀琀✀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>1.<span਀猀琀礀氀攀㴀✀昀漀渀琀㨀㜀⸀　瀀琀 ∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀✀㸀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀 㰀⼀猀瀀愀渀㸀㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Activate STUN </span></p>਀ 
<p class=MsoListParagraphCxSpMiddle style='text-indent:-18.0pt'><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㈀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䌀椀爀挀甀洀瘀攀渀琀 匀䤀倀ⴀ䄀䰀䜀 椀渀 
the CE450 IP R router. This is possible by setting up a SIP port outside the range਀漀昀 㔀　㔀㘀ⴀ㔀　㜀㄀ 椀渀 琀栀攀 琀攀氀攀瀀栀漀渀礀 瀀愀爀琀 漀昀 䜀椀最愀猀攀琀 䌀䔀㐀㔀　 䤀倀 刀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀䰀椀猀琀倀愀爀愀最爀愀瀀栀䌀砀匀瀀䴀椀搀搀氀攀 猀琀礀氀攀㴀✀琀攀砀琀ⴀ椀渀搀攀渀琀㨀ⴀ㄀㠀⸀　瀀琀✀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>3.<span਀猀琀礀氀攀㴀✀昀漀渀琀㨀㜀⸀　瀀琀 ∀吀椀洀攀猀 一攀眀 刀漀洀愀渀∀✀㸀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀☀渀戀猀瀀㬀 㰀⼀猀瀀愀渀㸀㰀⼀猀瀀愀渀㸀㰀猀瀀愀渀 
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Enable Firewall. </span></p>਀ 
<p class=MsoListParagraphCxSpLast style='text-indent:-18.0pt'><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀㐀⸀㰀猀瀀愀渀 
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span਀猀琀礀氀攀㴀✀昀漀渀琀ⴀ猀椀稀攀㨀㄀　⸀　瀀琀㬀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䔀渀猀甀爀攀Ⰰ 椀渀 愀挀挀漀爀搀愀渀挀攀 
with the preceding sections on symmetric NAT, that the ports set up locally in਀䌀䔀㐀㔀　 䤀倀 刀 昀漀爀 匀䤀倀 愀渀搀 刀吀倀 愀爀攀 甀猀攀搀 漀渀 琀栀攀 ☀焀甀漀琀㬀瀀甀戀氀椀挀☀焀甀漀琀㬀 猀椀搀攀 ⠀圀䄀一 猀椀搀攀⤀ 
of the router in question. For this it may be necessary to program Port਀䘀漀爀眀愀爀搀椀渀最 刀甀氀攀猀 椀渀 戀漀琀栀 爀漀甀琀攀爀猀 ⠀䌀䔀㐀㔀　 䤀倀 刀 愀渀搀 甀瀀猀琀爀攀愀洀 爀漀甀琀攀爀⤀⸀ 㰀⼀猀瀀愀渀㸀㰀⼀瀀㸀 
਀㰀⼀搀椀瘀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀☀渀戀猀瀀㬀㰀⼀猀瀀愀渀㸀㰀⼀戀㸀㰀⼀瀀㸀 
਀㰀瀀 挀氀愀猀猀㴀䴀猀漀一漀爀洀愀氀㸀㰀戀㸀㰀猀瀀愀渀 氀愀渀最㴀䔀一ⴀ唀匀 猀琀礀氀攀㴀✀昀漀渀琀ⴀ昀愀洀椀氀礀㨀∀䄀爀椀愀氀∀Ⰰ∀猀愀渀猀ⴀ猀攀爀椀昀∀✀㸀䤀渀挀漀洀椀渀最 
request from other than the preconfigured SIP-Proxy </span></b></p>਀ 
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>In਀漀爀搀攀爀 琀漀 瀀愀猀猀 琀栀爀漀甀最栀 琀栀攀 一䄀吀Ⰰ 椀渀挀漀洀椀渀最 爀攀焀甀攀猀琀猀 琀漀 琀栀攀 䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀 洀甀猀琀 
always be originiated by that communication endpoint, which the Gigaset VoIP਀瀀栀漀渀攀 攀砀瀀攀挀琀猀 爀攀焀甀攀猀琀猀 琀漀 挀漀洀攀 昀爀漀洀Ⰰ 戀攀挀愀甀猀攀 漀渀氀礀 琀漀 琀栀攀猀攀 攀渀搀瀀漀椀渀琀猀 愀 一䄀吀 
binding is opened and maintained. Usually, this is the preconfigured SIP-Proxy.਀吀栀攀爀攀 愀爀攀 瀀爀漀瘀椀搀攀爀Ⰰ 眀栀椀挀栀 洀椀最栀琀 猀攀渀搀 爀攀焀甀攀猀琀猀 琀漀 琀栀攀 䜀椀最愀猀攀琀 嘀漀䤀倀 瀀栀漀渀攀猀 瘀椀愀 
other SIP servers. Such requests will probably not pass through a NAT. For਀琀栀攀猀攀 瀀爀漀瘀椀搀攀爀猀Ⰰ 椀琀 椀猀 渀攀挀攀猀猀愀爀礀 琀漀 漀瀀攀渀 琀栀攀 匀䤀倀 氀椀猀琀攀渀 瀀漀爀琀 攀瘀攀渀 愀琀 琀栀攀 
WAN-interface by programming a port forwarding rule in the router. </span></p>਀ 
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