
14. Provisioning the iMG/RG Advanced VOIP Attributes
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AlliedView NMS Administration Guide
FIGURE 14-208 Advanced VOIP Attributes (SIP)
14.12.1 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.
The LCFO option is displayed from the Advanced VOIP Params button that is on both the Port Management View/Modify
“Voice Service” tab, and the iMG/RG Voice Service Profile display. When LCFO is enabled, it applies to all VoIP lines on the
iMG/RG.
14.12.2 SIP Subscribe Message Summary
SIP Subscribe Message Summary controls how an iMG receives notifications for events such as Message-Waiting Indication
(MWI) from the SIP call server. Depending on the SIP call server, the SIP Subscribe Message Method may or may not be
required for receiving the notifications. You can configure iMG devices to receive notifcations either with or without the
SUBSCRIBE method.
For iMG devices running software release 4.2.2 and earlier, the options for SIP Subscribe Message Summary are:
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