Single-Site Deployment
The single-site archetypal for Cisco Unified Communications consists of a call-processing
agent array amid at a distinct site, or campus, with no telephony casework provided over
an IP WAN. Figure 1-25 illustrates a archetypal single-site deployment. All Cisco UCM
servers, applications, and DSP assets are amid in the aforementioned concrete location. You
can apparatus assorted clusters central a LAN or a metropolitan-area arrangement (MAN) and
connect them through intercluster trunks if you charge to arrange added IP phones in a
single-site configuration.
36 Authorized Self-Study Guide: Cisco Articulation over IP (CVOICE)
PSTN
WAN Abstracts Only
SIP/SCCP
Cisco UCM
Cluster
V
Figure 1-25 Single-Site Deployment
An action about deploys the single-site archetypal over a LAN or MAN, which carries
the articulation cartage aural the site. Gateway trunks that affix anon to the PSTN handle
all alien calls. If an IP WAN exists amid sites, it is acclimated to backpack abstracts cartage only;
no telephony casework are provided over the WAN.
Design Characteristics of Single-Site Deployment
The single-site archetypal has the afterward architecture characteristics:
■ Distinct Cisco UCM cluster.
■ Maximum of 30,000 SCCP or SIP IP phones or SCCP video endpoints per cluster.
■ Maximum of 1100 H.323 accessories (gateways, MCUs, trunks, and clients) or MGCP
gateways per UCM cluster.
■ PSTN for all calls alfresco the site.
■ DSP assets for conferencing, transcoding, and media abortion point (MTP).
■ Voicemail, unified messaging, Cisco Unified Presence, audio and video components.
■ Capability to accommodate with bequest PBX and voice-mail systems.
■ H.323 clients, MCUs, and H.323/H.320 gateways that crave a attendant to place
calls charge annals with a Cisco IOS Attendant (Cisco IOS Release 12.3(8)T or
greater). UCM again uses an H.323 block to accommodate with a attendant and provide
call acquisition and bandwidth administration casework for H.323 accessories registered to it.
Multiple Cisco IOS Gatekeepers ability be acclimated to accommodate redundancy.
■ MCU assets are appropriate for multipoint video conferencing. Depending on conferencing
requirements, these assets ability be either SCCP or H.323, or both.
■ H.323/H.320 video gateways are bare to acquaint with H.320 videoconferencing
devices on a accessible ISDN network.
■ High-bandwidth audio (for example, G.711, G.722, or Cisco Wideband Audio)
between accessories aural the site.
■ High-bandwidth video (for example, 384 kbps or greater) amid accessories aural the
site. The Cisco Unified Video Advantage Wideband Codec, operating at 7 Mbps, is
also supported.