Cisco Cisco Packet Data Gateway (PDG) Fehlerbehebungsanleitung
Session Control Manager Overview
Product Description ▀
Cisco ASR 5000 Series Session Control Manager Administration Guide ▄
OL-22952-01
Figure 3.
Access Border Gateway
A -B G
S L F
A p p lic a tio n
S e rv e rs
S e rv e rs
H o m e
S u b s c rib e r
S e rv e r
S u b s c rib e r
S e rv e r
A c c e s s N e tw o rk
IM S C o re
Proxy-CSCF
The primary point of entry into the IMS network is the Proxy-CSCF (P-CSCF). The P-CSCF is responsible for:
providing message manipulation to allow for localized services (traffic/weather reports, news, directory services,
etc.)
initiating the breakout of emergency service calls
Topology Hiding Inter-network Gateway (THIG)
Quality of Service (QoS) authorization
number conversions for local dialing plans
terminate IPSec tunnels
The P-CSCF is the handset’s first point of entry into the IMS and is also the outbound proxy for SIP. Once the P-CSCF
has completed all of the functions for which it is responsible, the call setup is handed off to the Interrogating-CSCF (I-
CSCF).
has completed all of the functions for which it is responsible, the call setup is handed off to the Interrogating-CSCF (I-
CSCF).