30 BSGX4e Business Gateway User Guide
NN47928-102 Release 01.01
Figure 1. BSGX4e Connectivity
Device Features
An BSGX4e unit provides the following services:
VoIP Session Controller
The BSGX4e unit acts as the session controller for up to 1000 VoIP phones. It can
use the SIP or MGCP protocol and can control up to 500 concurrent calls.
When the WAN is down, the unit provides VoIP survivability. It can place calls
between LAN endpoints and, with its intelligent lifeline, it can switch calls to the
PSTN through the emergency backup FXO line.
Integrated VoIP Gateway (User Agent)
An BSGX4e unit also acts as User Agent (UA) for VoIP phones. It provides a VoIP
endpoint within the network, performing signaling, media control, and conversion
from traditional interfaces to VoIP.
Administrative
Servers
VoIP Call
Servers
Central Office
Line
Analog Phone
VoIP Phones
ICAD40
