NEC Support Page
1.How to install NEC Sl1000?
Connect master phone set line in ST1 port and other extension line in ST ports, Main Trunk lines in CO1 and other to avilable CO ports, connect the power cord and press the power switch.System will start in 2 minutes.
2.What are the default system status?
3.How to change Extension numbers?
First define the range for extension no. at 11-01 ;then replace the new desired number at desired ports at program 11-02.
4.Incoming call lid blink but no ring?
5.No Caller ID for Incoming trunk call?
6.Do not Distrub sound when you call to an extension?
Its the feature to block call,To deactivate-Press Speaker and dial 847 0 ,