User guide

Deprovision the iMG and Re-provision with the ADSL Uplink LCFO
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AlliedView NMS Administration Guide (Provisioning the iMG/RG)
7.13 LCFO
The Loop Current Feed Open option is used to indicate that the calling/called party has gone onhook and is a useful feature for businesses
that have key systems that transfer calls. This is available on all iMGs that are 3-7 and up. Both MGCP and SIP are supported.
FIGURE 7-203 Advanced VOIP Attributes (MGCP) - LCFO