RAT-Type Attribute

The RAT-Type Attribute (attribute type 1032) specifies the radio access technology type. It occurs in AAR and RAR messages received by the P-CSCF. For purposes of NPLI, the following values are supported:

   0 - WLAN
   1 - Virtual (indicates that RAT is unknown)
1000 — Universal Terrestrial Radio Access Network (UTRAN)
1001 — GSM Edge Radio Access Network (GERAN)
1002 - GAN (Generic Access Network)
1003 - HSPA_EVOLUTION (Evolved High Speed Packet Access)
1004 — Evolved UMTS Radio Access Network (EUTRAN)
2000 - CDMA2000_1X (core CDMA2000 wireless air interface)
2001 - HRPD (High Rate Packet Data)
2002 - UMB (Ultra Mobile Broadband)
2003 - EHRPD (Enhanced High Rate Packet Data)

In the event that a received RAT-Type attribute contains an unsupported type, an error condition is declared and the default PANI is used.