Figure 9-116 Psa-L Unit - NEC Univerge SV9100 System Hardware Manual

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13.5 PSA-L (BK) UNIT / PSA-L (WH) UNIT

SV9100 System Hardware Manual

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 9-116 PSA-L UNIT

User System/PSTN

Volume Control

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