NEC SL1000 Features And Specifications Manual page 602

SL1000/SL1100 ISSUE 2.0
PRG 22-05 : Incoming Trunk Ring Group Assignment
Ext. 303 0 *1 0 *1 1
*1. To allow extension user to answer flashing line, be sure to give extension incoming access to the trunk in
PRG 14-07 and PRG 15-06.
1 = Extension rings
0 = Extension does not ring
Operation
R
Refer to Central Office Calls, Answering on page 1-122.
1-592 Ring Groups