Configuring Lines and Extensions
Configuring Lines
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide 27
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STEP  5 Find the first line to configure (line 4 in this example):
a. From the 
Extension
 drop down list, choose Disabled.
b. From the 
Share Call Appearance
 drop-down list, choose private.
c. Enter the following string in the Extended Function field:
fnc=blf+cp;sub=Stephanie@$PROXY;ext=300@$PROXY
Using the following syntax:
fnc=type;sub=stationname@$PROXY;ext=extension#@$PROXY
where:
- fnc: function
- blf: busy lamp field
- cp: call pickup
- sub: station name
- ext or usr: extension or user (the usr and ext keywords are 
interchangeable)
STEP  6 Click Submit All Changes. After the phone reboots, the phone (in this example) 
should show the following color LEDs for the monitored lines:
• Green: Available
• Red: Busy
• Red Fast Blink: Ringing
If the phone LEDs display orange or slow blinking orange, there is a problem: 
Orange denotes that the phone failed to subscribe (received 4xx response) and 
slow blinking orange denotes an undefined problem (there may be no response to 
subscribe, or BLF).
In this example, after this configuration, Bob will be able to monitor Stephanie’s 
line. He can press line button 4 to pick up a call ringing at Stephanie’s line.
Configuring Speed Dial
In this example, the assistant Bob (extension 200) has another idle line (line 5) on 
his Cisco SPA 508G. He would like to be able to speed dial his supervisor Mark 
(extension 400) from that line.