PLANET UMG-2000 - Manual (Page 23)

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2.2.3 PSTN FXO Port Connection
ƒ Locate the voice port of the PSTN adapter on the rear panel.
ƒ The Analog PSTN port may vary from 4 / 8 FXO ports.
ƒ Connect one or more telephone cables to one of the selected FXO port.
2.2.4 ISDN T1/E1 Port Connection
ƒ Locate the digital voice port of the T1/E1 adapter on the rear panel.
ƒ Connect the ISDN network with the T1/E1 port.