http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Network_Service_Access_Point_Identifier 2026-10-25T11:57:56Z Revision history for this page on the wiki MediaWiki 1.43.1 http://debianws.lexgopc.com/wiki143/index.php?title=Network_Service_Access_Point_Identifier&diff=2757196&oldid=prev 2025-05-08T13:56:40Z

<p>chg unref. to one source tag; ► Wikipedia:WikiProject Unreferenced articles; <a href="/wiki143/index.php?title=WP:URA&amp;action=edit&amp;redlink=1" class="new" title="WP:URA (page does not exist)">you can help!</a> ●</p> <p><b>New page</b></p><div>{{Short description|Identifier used in GPRS (cellular data) networks}}<br /> {{Other uses|NSAPI (disambiguation){{!}}NSAPI}}<br /> {{One source|date=May 2025}}<br /> <br /> A &#039;&#039;&#039;Network (Layer) Service Access Point Identifier&#039;&#039;&#039; (&#039;&#039;&#039;NSAPI&#039;&#039;&#039;)&lt;ref&gt;{{cite web |title=NSAPI - Network Service Access Point Identifier |url=https://www.mpirical.com/glossary/nsapi-network-service-access-point-identifier |website=mpirical.com |access-date=8 May 2025}}&lt;/ref&gt; is an identifier used in [[GPRS]] (cellular data) networks.<br /> <br /> It is used to identify a [[Packet Data Protocol]] (PDP) context (a unique data session) in the [[Mobile Station]] (MS) and in the [[Serving GPRS Support Node]] (SGSN). It is dynamically selected by the MS (however, the MS should ensure that the selected NSAPI is not currently being used by another session management entity in the MS). When the MS requests a PDP context, it selects an NSAPI that it sends to the SGSN with the request.<br /> <br /> NSAPI is also used as part of the [[Tunnel Identifier]] between [[GPRS Support Nodes]] (GSNs). The user identity ([[International Mobile Subscriber Identity]] (IMSI)) and the application identifier (NSAPI) are integrated into the [[Tunnel Identifier (GTPv0)]] (TID) or [[Tunnel Endpoint Identifier (GTPv1)]] (TEID) that uniquely identifies the subscriber&#039;s sublink between the GSNs (SGSN and GGSN). The SGSN inserts the NSAPI along with the SGSN address in the “Create PDP Context Request.” One PDP context may have several (secondary) PDP contexts and NSAPI. The NSAPI is an integer value within the PDP context header.<br /> <br /> In the [[UMTS]] system the data connection between a [[GPRS Core Network]] and a mobile station is identified using an NSAPI, that identifies as well a radio access bearer. In the previous releases of GPRS (pre-Release’00), a connection is identified by NSAPI and a [[Logical Link Control]] (LLC) protocol SAPI. However, in UMTS, and thus in GPRS Release’00, the LLC protocol is no longer used.<br /> <br /> ==References==<br /> {{reflist}}<br /> <br /> [[Category:3GPP standards]]<br /> [[Category:Telecommunications infrastructure]]<br /> <br /> <br /> {{Telecommunications-stub}}</div>

imported>JoeNMLC