CHAPTER
37-1
Catalyst 3750 Switch Software Configuration Guide
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Configuring TelePresence E911 IP Phone Support
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
The Catalyst 3750 switch command reference has command syntax and usage information.
• Understanding TelePresence E911 IP Phone Support, page 37-1
• Configuring TelePresence E911 IP Phone Support, page 37-2
Understanding TelePresence E911 IP Phone Support
You can use a Cisco IP phone as a user interface in a Cisco TelePresence System. See in Figure 1. In this
configuration, the IP phone must always be on and available for emergency calls. If the power to the
codec in the Cisco TelePresence System fails, is disrupted or if the codec fails, the IP phone is not
available.
Figure 37-1 Phone-Codec-Switch Connection
Use the TelePresence E911 IP phone support feature to ensure that the IP phone is always on and
available for emergency calls. When a CDP-enabled IP phone is connected to the codec through a switch,
you can configure the switch to forward CDP packets from the IP phone only to the codec in the Cisco
1 Switch 3 IP phone
2 Cisco TelePresence System with a codec
IP
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