Cisco Systems OL-8550-09 Configuring TelePresence E911 IP Phone Support

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Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
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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, page37-1
•Configuring TelePresence E911 IP Phone Support, page37-2
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.
Figure37-1 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
1Switch 3IP phone
2Cisco TelePresence System with a codec
IP
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