H323 Install Page 19
15-601046 Issue 14j (10 March 2009)IP Office 4.2
IP Office IP Phones: Potential VoIP Problems1.12 User PC Connection
To simplify the number of LAN connections from the user's desk, it is possible to route their PC Ethernet LAN cable via
some H323 IP phones. The LAN cable should be connected from the PC to the socket with a PC symbol ( ) at the back of
the IP phone. This port supports 10/100Mbps ethernet connections. The PC's network configuration does not need to be
altered from that which it previously used for direct connection to the LAN.
Those phones that include a PC pass-through port and also provide priority to phone voice traffic over PC data traffic are
normally indicated by an SW suffix in the phone name. However some phones have a PC pass-through port but do not
provide switching priority.
The table below summarizes the phones:
·*The 4606, 4612 and 4624 phones can be upgraded to provide voice priority switching by fitting an Avaya 30A
Switch Upgrade Base to the phone. In addition, this base also allows the phone to be powered from a IEEE
802.3af Power over Ethernet source.
If a 1000mbps ethernet connection is being used then a separate Gigabit Adapter (SAP 700416985) must be used.
This device splits the data and voice traffic before it reaches the phone, providing a 10/100Mbps output for the
phone and a 10/100/1000Bbps output for the PC. The adapter is powered from the phone's existing PoE supply or
1151 type power supply unit. Refer to the "Gigabit Ethernet Adapter Installation and Safety Instructions" (16-