SCCP
SCCP works in a client/server architecture, as shown in Figure 1-5, which simplifies the
configuration of SCCP devices such as Cisco IP Phones and Cisco ATA 180 Series and
VG200 Series FXS gateways.
PSTN
SCCP
SCCP Endpoint
V
FXS
Figure 1-5 SCCP Signaling
SCCP is used on Cisco VG224 and VG248 analog phone gateways. ATAs enable communications
between Cisco UCM and a gateway. The gateway then uses standard analog
signaling to an analog device connected to the ATA’s FXS port. Recent versions of Cisco
IOS voice gateways—for example, the 2800 series—also support SCCP controlled
Foreign Exchange Station (FXS) ports.