Psa-R Adapter (Figure 4-19) - NEC UX5000 Hardware Manual

Chapter 4 - Terminals and Optional Equipment
4.13.7

PSA-R Adapter (Figure 4-19)

Using the PSA Adapter provides power failure capability for the IP (Enhanced or IP-CTS) and digital Enhanced
keysets. This allows a user to make or receive an outside call using the central office if a keyset is unable to
make or receive a call, if for instance, there was a power failure. In this case, the connection of the IP keyset
would automatically be changed from LAN to PSTN (public switched telephone network). This allows the dial
pad keys (0-9, * and #) to be used for placing and receiving calls - no other keyset functions are available.
When using this option, the handset must be replaced with the PSA and the dial pad must be replaced to the
double-contact type to disable the dial pad backlit option.
The operation occurs in the following instances:
● No power supplied to the keyset
- The connection is automatically switched to an analog PSTN line when power failure occurs.
- Unless it was manually switched to PSTN mode, it will automatically switch back once power
is restored and the terminal is in an idle condition.
●
PSTN is selected using the PSTN-IP/Digital Switch on the adapter
- The PSTN mode is kept until the adapter is switched back to IP/Digital mode.
✎
Headsets are not supported by the PSA Adapter.
✎
The baclight function does not operation on a terminal with a PSA Adapter installed.
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