User guide

51
CCS7 Quick References
(NTP 297-YYYY-350, Translations Guides)
CCS7 Terminology
Associated Route
— Direct route between signalling points; route where
DPC of routeset equals DPC of linkset.
Connectionless — Signalling type for all signalling that is not associated
with set-up or take-down (E800 database query,
maintenance, etc.)
Connection-Oriented — Signalling type used for setup and take-down of
calls (i.e. ISUP).
Link — Communication channel between two adjacent signalling points.
Linkset
— A group of signalling links connecting two signalling points.
Point Code — Every node in the network has its own unique point code
used to direct messages. Nine digit point code format
equals: <network #> <cluster #> <member #>
OPC
(Origination Point Code)
DPC (Destination Point Code)
Quasi-associated
— Indirect signalling route through an STP.
Route — A signalling path in the signalling network; this path may consist
of one or more linksets to a destination.
Routeset — A logical grouping of routes towards a destination.
SCP — Service Control Point provides network access to transaction
services (database queries).
SP — Signalling Point is a node in the network that provides trunk
signalling only.
SSP — Service Switching Point is a node in the network that originates and
terminates CCS7 messages (connectionless & connection
-oriented).
SL — Signalling Links interconnect adjacent nodes in the network:
A-link access links connect SPs, SSPs, and SCPs to STPs.
B-link
bridge links connect mated STP pairs to other
mated STP pairs.
C-link
cross links connect two STPs creating mated a pair.
D-link diagonal links connect STP quads in different
regions (primary to secondary STPs).
E-link
extended links connect an SPs, SSPs, or SCPs to
an STP in a different region.
F-link
fully associated links interconnect SPs, SSPs, and
SCPs using associated signalling.
STP — The STP (Signal Transfer Point) is a node in the network that route
messages between network nodes using signalling links; STPs do
not originate or terminate CCS7 messages other than network
management messages.
CCS7 Linksets