NEC Univerge SV9100, System Hardware Manual

Page: 516 / 556

Issue 2.0
7-40 Installing SV9100 Optional Equipment
11.5 PSA-L (BK) UNIT / PSA-L (WH) UNIT
The PSA-L UNIT (Power Save Adapter), an optional adapter for the ITL/DTL
Terminals, is used with IP telephones to make or receive a call using the Public
Switched Telephone Network (PSTN) when a call cannot be made or received
using the Local Area Network (LAN). When a power failure occurs, the IP
telephone is automatically switched to the PSTN. When power is restored, the IP
telephone restarts and connects to the network unless a conversation is in
progress on PSTN. The PSTN call must be completed by going on-hook before
the connection to the LAN is restored. The unit features:

Survivability in case of power failure or network congestion

Support on modular terminals (ITL/DTL)

PSTN Type = analog PSTN

Dial method – MF/DF (10pps)
Figure 7-35 PSA-L UNIT
User System/PSTN
Switch
Volume Control
LED
PSTN