Telcordia has defined national ISDN, which is basically within the construct of Q.931 protocol with some modifications. If National ISDN requires a new information element (IE), how will this need be handled?
A.
No new IE can be defined by standard bodies other than ITU-T; therefore, Telcordia must pass the information in open fields of
existing IE.
B.
Telcorida has to define a new codeset (CS) 0 IE.
C.
Telcordia should define a new CS7 IE
D.
Telcordia should define a new CS5 IE
E.
Use CS8 IE