After you configure the NSAP address of an NE, you can create an OSI GNE in the TP4 connection mode.
The NSAP address consists of hexadecimal digits of up to 20 bytes, and its format is: domain address+08003e+NE ID+NSEL. The domain address is composed of 13 bytes and is entered by the user. The NSEL is the port number of the network-layer protocol, with a fixed value of 1d (one byte).