## 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.

1. After entry of the command sequence, telephones with an internal Ethernet switch display the following text, depending on the current interface control value:

PHY1=status *=change #=OK

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

1. 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 100Mbps FDX (5), pressing * changes the value to 1 (auto).

If a value different from the current PHY1STAT value is entered, the following text displays left-justified at the top of the display:

Save new value? *=no #=yes

1. Press the * button to terminate the procedure, or the # button to save the new value. If you press the # button, the following text displays:

PHY2=status *=change #=OK

where status is the value of PHY2STAT, defined as:

- Status is disabled when PHY2STAT = 0
- Status is auto when PHY2STAT = 1
- Status is 10Mbps HDX when PHY2STAT = 2
- Status is 10Mbps FDX when PHY2STAT = 3
- Status is 100Mbps HDX when PHY2STAT = 4
- Status is 100Mbps FDX when PHY2STAT = 5

1. To change the PHY2 value, press *.

Depending on the current value, the next sequential valid PHY2 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 100Mbps FDX (5), pressing * changes the value to 0 (disabled).

The following text displays left-justified at the top of the display:

Save new value? *=no #=yes

1. Press the * button to terminate the procedure, or the # button to save the new values.
   If you press the # button, the following text displays.

New value being saved

The new values are saved and a restart occurs automatically. The user interface is restored to its previous state.