Multisite WAN with Centralized Call-Processing Deployment
The archetypal for a multisite WAN deployment with centralized alarm processing consists of a
single call-processing abettor array that provides casework for assorted alien sites and
uses the IP WAN to carriage Cisco Unified Communications cartage amid sites. The
IP WAN additionally carries alarm ascendancy signaling amid axial and alien sites. Figure 1-26
illustrates a archetypal centralized alarm processing deployment, with a UCM array as the
call processing abettor at the axial armpit and an IP WAN with QoS enabled to affix all
the sites. The alien sites await on the centralized UCM array to handle their alarm processing.
Applications such as articulation mail and IVR systems are about centralized as well
to abate the all-embracing costs of administering and maintenance.
Chapter 1: Introducing Articulation over IP Networks 39
SIP/SCCP
Cisco UCM
Cluster
V
V
IP
WAN
PSTN
SRST
Capable
SRST
Capable
SIP/SCCP SIP/SCCP
V
Figure 1-26 Multisite WAN with Centralized Alarm Processing
WAN connectivity options accommodate the following:
■ Leased lines
■ Frame Relay
■ ATM
■ ATM and Frame Relay Service Inter-Working (SIW)
■ Multiprotocol Label Switching (MPLS) VPN