User Guide for the SIP-T19(P) E2 IP Phone
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You can configure a primary account on the IP phone and other alternate accounts on
the other IP phones. For example, party A, party B share the account 4603, phone A
registers the primary account 4603, phone B registers the alternate account 4603_1,
phone C registers the account 4604.
To configure the shared line settings on phone A via web user interface:
1. Register the account 4603.