Grandstream GXV3240 Administration Guide - Manual (Page 58)

Firmware Version 1.0.3.37 GXV3240 Administration Guide Page 56 of 117
set to "Broadsoft" and "Enable SCA" is set to "Yes".
Line-seize Timeout
It is used to configure the line-size event expiration timer for this
account. If the Shared Call Appearance is active, the phone will send
a SIP SUBSCRIBE request for the line-seize event package if a user
attempts to take the shared line off hook The default value is 15
seconds. The valid range is from 15 to 60.