Local Administrative Options
36 1600 Series IP Telephone Installation and Maintenance Guide
Interface Control
Use the following procedure to set or change the interface control value.
1. While the telephone is on-hook and idle, press the following sequence of keys on the
faceplate of the telephone:
Mute 4 6 8 # (Mute I N T #)
Note: Press the Mute button momentarily. Do not press this button while pressing other
keys/buttons.
2. After entry of the command sequence, telephones with an internal Ethernet switch display
the following text, depending on the current interface control value:
where status is the value of PHY1STAT, defined as:
● Status is auto when PHY1STAT = 1
● Status is 10Mbps HDX when PHY1STAT = 2
● Status is 10Mbps FDX when PHY1STAT = 3
● Status is 100Mbps HDX when PHY1STAT = 4
● Status is 100Mbps FDX when PHY1STAT = 5
3. To change the PHY1 value, press *.
Depending on the current value, the next sequential valid PHY1 value is selected and
displayed as the status. For example, if the current value is 10Mbps HDX (2), pressing *
changes the value to 3 (10Mbps FDX). If the current value is 1000Mbps FDX (6), pressing *
changes the value to 1 (auto).
PHY1=status
*=change #=OK
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