Hi,here is the intercom configured excerpted from doc:
ephone-dn 1
number A4002
label Intercom
intercom A4004
!
ephone-dn 2
number A4004
intercom A4002
Question: what is the intercom A4004 mean? I tested even if I only have intercom under ephone, it'll go into speaker mode when receive call. So why need A4004 after intercom, meaning only accept call from phone A4004? thanks