NEC Univerge SV9100, Hardware Manual

Page: 455 / 478

UNIVERGE SV9100 Issue 1.2
System Hardware Manual 6 - 43
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 6-34 PSA-L UNIT
The PSA should not relied upon as the sole means
of providing contact with Emergency services in
the event of a power failure or communication
loss with the main SV9100 system
User System/PSTN
Switch
Volume Control
LED
PSTN