to lock a phone (off hook dial 77+ 3xdigits twice )ie 77123 123 to unlock dial 77+ same 3 digits once) ie 77 123.
as for co out day & night this depends on the type of restriction currently in place . it could be set as a class of service or the lines may be set as not connect or co out day and night may be set as no. you will need to tell us what the display says when you try to pick up a line
peter(
www.novacomms.net)