N26 interface is an interface which interconnects the 5G Core network function AMF with 4G network node MME and enables interworking between 5G to 4G and visa versa.
- N26 is the interface between 5G AMF and 4G MME
- N26 interface is based on GTPv2 instead of Httpv2 which is known for 5G Service Based Architecture
- It enables interworking between 5G and 4G to support Inter-RAT mobility
- N26 interface support seamless session continuity for Voice and Data during inter-RAT handover (5G to 4G and 4G to 5G)