User's Manual Part 1
Firmware Version 1.0.0.1  UCM6200 Series IP PBX User Manual  Page 126 of 320
SRTP 
Enable SRTP for the call. The default setting is disabled. 
Fax Mode 
Select Fax Mode. The default setting is “None”. 
  None: Disable Fax. This is the default setting. 
  Fax Detect: Fax signal from the user/trunk during the call can be 
detected and the received Fax will be sent to the Email address 
configured for this extension. If no Email address can be found for the 
user, the Fax will be sent to the default Email address configured in 
Fax setting page under web UI->PBX->Internal Options->Fax/T.38. 
Strategy 
This option controls how the extension can be used on devices within 
different types of network. 
 Allow All 
Device in any network can register this extension. 
  Local Subnet Only 
Only the user in specific subnet can register this extension. Up to 
three subnet addresses can be specified. 
 A Specific IP Address 
Only the device on the specific IP address can register this extension.
The default setting is "Allow All". 
Codec Preference 
Select audio and video codec for the extension. The available codecs are: 
PCMU, PCMA, GSM, AAL2-G.726-32, G,726, G.722, G.729, G.723, iLBC, 
ADPCM, H.264, H.263, H.263p and VP8. 
Table 39: IAX Extension Configuration Parameters->Features 
Call Transfer 
Call Forward Unconditional 
Configure the Call Forward Unconditional target number. If not 
configured, the Call Forward Unconditional feature is deactivated. The 
default setting is deactivated. 
CFU Time Condition 
Select time condition for Call Forward Unconditional. CFU takes effect 
only during the selected time condition. The available time condition are 
“Office Time”, “Out of Office Time”, “Holiday”, “Out of Holiday”, “Out of 
Office Time or Holiday” and “Specific”.   
Note: 
  “Specific” has higher priority to “Office Times” if there is a conflict in 
terms of time period. 
  Specific time can be configured on the bottom of the extension 
configuration dialog. Scroll down the add Time Condition for specific 
time. 
  Office Time and Holiday could be configured on page Settings->Time 










