Th ntllgnt Ntwrk (N) s th stndrd ntwrk rchtctr spcfd n th T-T Q.1200 srs rcmmndtns. t s ntndd fr fxd s wll s mbl tlcm ntwrks. t llws prtrs t dffrntt thmslvs by prvdng vl-ddd srvcs n ddtn t th stndrd tlcm srvcs sch s PSTN, SDN n fxd ntwrks, nd GSM srvcs n mbl phns r thr mbl dvcs.
Th ntllgnc s prvdd by ntwrk nds n th srvc lyr, dstnct frm th swtchng lyr f th cr ntwrk, s ppsd t sltns bsd n ntllgnc n th cr swtchs r qpmnt. Th N nds r typclly wnd by tlcmmnctns srvc prvdrs sch s tlphn cmpny r mbl phn prtr.
N s spprtd by th Sgnlng Systm #7 (SS7) prtcl btwn ntwrk swtchng cntrs nd thr ntwrk nds wnd by ntwrk prtrs.