Applications for SmartNode 4110 Series 27
Model 4520 & 4110 Series Getting Started Guide 2 • Applications Overview
Application—Private line automatic ringdown (PLAR)
Using two FXS models back-to-back a private hot-line can be created (see figure 9). These can be found in
use as courtesy phones at ATM’s, information kiosks, and emergency assistance pedestals. In this operation,
when one handset is picked-up, the far immediately begins ringing. When the far-end handset is picked-up
the speech path is completed. The link supports voice, fax Gr.3 (2.4–14.4 kbps) with T.38 or fax bypass, or
modem connections using a G.711 codec.
Figure 9. FXS to FXS extension
Application—Enterprise campus BRI to FXS telephony extension
In combination with the Patton SmartNode 1000 and 2000 Series models the FXS gateways provide ISDN
BRI to FXS extensions over IP (see figure 10).
Figure 10. BRI to FXS extension
