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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)
OL-3141-01
Chapter1 Cisco Analog Telephone Adaptor Overview
Overview of the Skinny Client Control Protocol
Figure 1-2 The Cisco ATA 186 as an Endpoint in an SCCP Network
Figure 1-3 The Cisco ATA 188 as an Endpoint in an SCCP Network
Overview of the Skinny Client Control Protocol
The Skinny Client Control Protocol (SCCP) is the Cisco standard for real-time calls and conferencing
over Internet Protocol (IP). With SCCP, Cisco IP Phones can co-exist in an H.323 environment. When a
Cisco CallManager is coupled with an H.323 Gatekeeper or an MGCP Call Agent, a Cisco ATA running
SCCP interoperates with H.323 terminals on the far end to establish, control and clear audio calls.
Figure 1-4 illustrates the architecture of an SCCP network.
V
Cisco ATA 186
Telephone or fax
Ethernet
Cisco CallManager
Layer 3
IP infrastructure
PSTN
Voice
gateway
82049
V
V
Cisco ATA 188
Telephone or fax
Ethernet
Cisco CallManager
Layer 3
IP infrastructure
PSTN
Voice
gateway
82050
V