Hold two lines while conference conversation
(handset-state)
1. At handset conference mode, press "HOLD" key.
2. Line1 and line2 enter the hold mode together.
3. Press "LINE1" ("LINE2") key to talk over handset of line1 (line2), line2 (line1)
still in hold state.
4. After finished line1 (line2), press "LINE2" ("LINE1") key to talk over handset
of line2 (line1).
5. After finished talk of line 2 (line1), return the handset to the base.
Hold function
1. When talking over handset on line1 or line2, press "HOLD" key to enter the
hold mode.
2. Hang up handset, it enters hands free hold mode.
3. Pick up handset to talk over at handset or press "H.F" key to quit hold mode
and talk at hands free mode.
4. When talking in hands free mode on line1 or line2, press "HOLD" key to enter
hold mode.
5. Pick up handset to talk over handset.
6. Or press "H.F" key to quit hold mode and talk at hands free mode.
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