Use the LLDP-MED TLV location for emergency calls on 9800/8875
Once the LLDP-MED relevant settings are finished on the phone web page, the phone can get location from the network switch by the LLDP-MED protocol.
Typically, LLDP-MED contains a location TLV that provides the civic location information. When an emergency number is dialed, the phone sends its the location information to the emergency responders to help them locate the physical address.
This feature is only available for the phone lines that are registered call controllers that support LLDP MED TLV Location Identification Support. For the phone lines registered to Webex Calling, BroadWorks, or Unified CM, the configuration doesn't take effect.
Before you begin
Ensure that the network switch has been configured to create a civic location and bind it to an interface on the switch.
After the switch is configured successfully, it can send location information to the phone using the LLDP-MED protocol.
For more information about how to configure the LLDP-MED TLV locations, see Configuring LLDP, LLDP-MED, and Wired Location Service.
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Access the phone administration web page. |
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Select , where (n) is the phone extension number. |
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In the Dial Plan section, set the Emergency Number parameter. |
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In the E911 Geolocation Configuration section, set the following parameters as described in Parameters for LLDP-MED TLV location for emergency calls:
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Click Submit All Changes. |
Parameters for LLDP-MED TLV location for emergency calls
Parameter | Default and options | Description |
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Section: Dial Plan | ||
Emergency Number | Default: Empty Valid Values: Maximum of 63 characters | Specifies the emergency number. For multiple emergency numbers, separate each one with a comma. You can configure this parameter in the phone configuration XML file (cfg.xml) by entering a string in this format:
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Section: E911 Geolocation Configuration | ||
E911 Enable | Default: Yes Options: Yes, No | Enables or disables the E911 geolocation feature. If set to Yes, the phone will insert geolocation information into the SIP INVITE when placing an emergency call. You can configure this parameter in the phone configuration XML file (cfg.xml) by entering a string in this format:
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Location Source | Default: HELD Options: LLDP-MED, HELD | Specifies the protocol used to obtain the phone's location information. The supported protocols are:
You can configure this parameter in the phone configuration XML file (cfg.xml) by entering a string in this format:
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Location Info Schema | Default: HYBRID Options: HYBRID, RFC4119, RFC5139 | Specifies the PIDF format used in the SIP messages.
You can configure this parameter in the phone configuration XML file (cfg.xml) by entering a string in this format:
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Retransmission Allowed | Default: False Options: False, True | Determines whether to allow retransmission of the location information in SIP messages.
You can configure this parameter in the phone configuration XML file (cfg.xml) by entering a string in this format:
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