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ZIP2x2 User’s Manual
• two 10/100Base-T Ethernet circuits to connect to the LAN and one additional device such as a
desktop PC, a notebook PC, or another accessory
• receives power over Ethernet (IEEE 802.3af) or from ac adapter
1.2.1 Switch Functionality (ZIP2x2)
The ZIP2x2 phone uses an Ethernet switch (not a hub) to connect the PC port and the phone itself
to the LAN. Therefore, the ZIP2x2 phone can control the QoS to ensure that voice packets always
have priority. Further, when the phone is not in use, the ZIP2x2 supports wire speed switching
between the LAN (network) and the PC port. A conceptual picture of the switch is shown in
figure 1-3.
The inclusion of the switch inside the phone allows you to take a single Ethernet circuit from the
wiring closet to the desktop. If you are connecting multiple users and not computers, you can use
this internal switch to make connections to other phones. You can connect phones two layers
deep with this arrangement to minimize the number of switch ports required in the wiring closet.
1.2.2 Display Description
The display is a graphical LCD, 144 dots by 32 dots. It is used mostly to display characters, 16
columns by 3 rows. You can adjust the contrast of the display as described in section 8.4.1 on page
89.
Figure 1-3 Internal Representation of the ZIP2x2 Managed Switch
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