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Voice and Video
23.3 Enabling Enhanced Voice Call Tracking
23.3
Enabling Enhanced Voice Call Tracking
SCALANCE W provides seamless support for tracking VoIP calls in the network by using
SNMP to send the location details of the caller to the third-party server. This feature is
currently applied for tracking Emergency 911 (E911) VoIP calls.
The Master AP identifies the location from where the VoIP call was placed and sends the
details of the location to the third-party SNMP server. You must configure the third-party
server as an SNMP host and enable SNMP traps to activate the voice call tracking feature
on the AP. For more information on configuring a third-party server as an SNMP host, see
Configuring SNMP (Page 481).
The Master AP will send the WLSXAPVOICECLIENTLOCATIONUPDATE SNMP trap under
the following scenarios:
● The VoIP call is successful.
● The VoIP client roams from one AP to another during an active call, the Master AP will
identify the VoIP client and send out the WLSXAPVOICECLIENTLOCATIONUPDATE
trap to the emergency call server.
Note
The trap sending feature is not supported for L3 mobility.
The WLSXAPVOICECLIENTLOCATIONUPDATE trap contains the following information:
Table 23- 3
Parameter
wlsxTrapVcIpAddress
wlsxTrapVcMacAddress
wlsxTrapAPMacAddress
wlsxTrapAPName
SNMP GET
In order to find the location of a particular emergency caller, the third-party SNMP server
sends a query to the Master AP using SNMP GET. The Master AP responds back to the
SNMP server with the location (AP Name) of the VoIP caller. Following are the key
parameters in the response sent by the Master AP:
● VoIP Client IP Address
● VoIP Client MAC Address
● AP MAC Address
● AP Name
382
SNMP Trap Details for VoIP Calls
Description
IP address of the VoIP client.
MAC address of the VoIP client.
MAC address of the AP which generated the trap.
Name of the AP which generated the trap.
Configuration Manual, 02/2018, C79000-G8976-C451-02
SCALANCE W1750D UI
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