Inter exchange signaling
nChannel
associated signaling (CAS) as No.5, R1, R2
nanalog and
digital connections
nModern
ISDN exchanges apply SS7(digital), that is a common channel signaling method
(CSS) that is discussed later in its own lecture
nCAS
is divided into line and register signaling:
nLine
signaling:
nline
state between the trunk-links as
nanswer,
clear-forward, clear-back
nRegister
signaling:
nrouting
information as
nB-number,
A-category, B-status