20020927Craig Exhibit 500.pdf

RSTP
LSTP LSTP
RSTP
SCPSCP
Switch
SSP
Switch
SSP
A Link
F LinkSSP
E LinkE Li
nk
A Link
Exhibit No. 500
Case No. QWE-T-02-11
Craig, Joe (Direct)--Qwest
September 27, 2002
LSTP
SS7 Network
LEGEND
SSP: Service Switching Point
STP: Signaling Transfer Point
SCP:Service Control Point
RSTP: Regional Signaling Transfer Point
LSTP:Local Signaling Transfer Point
A Link: An "A" (access) link connects a
signaling end point (e.g., an SCP or SSP)
to an STP.
B Link: A "B" (bridge) link connects an
STP to another STP at same hierarchy
level (i.e., LSTP to LSTP).
C Link: A "C" (cross) link connects STPs
performing identical functions into a
mated pair.
D Link: A "D" (diagonal) link connects a
secondary (e.g., local or regional) STP
pair to a primary (e.g., inter-network
gateway) STP pair in a quad-link
configuration (i.e., LSTP to RSTP).
E Link: An "E" (extended) link connects
an SSP to an alternate STP.
F Link: An "F" (fully associated) link
connects two signaling end points (i.e.,
SSPs and SCPs).
C Link
D Link
C Link