Nortel Networks 9150 - Manual (Page 290)

260 Remote Gateway 9150 Installation and Administration Guide
Using Remote Gateway 9150 stations Standard 3.1
Modes of operation
Digital telephones at your Remote Gateway 9150 site can operate in the
following modes:
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host-controlled
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locally controlled
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online to host PBX
!
offline from host PBX
Host-controlled mode
Host-controlled mode means that the host PBX controls the following:
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some display messages that display on your telephone
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indicator updates such as the message waiting indicator
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calls that you receive from or place to someone at the host PBX site
In host-controlled mode, a voice path is established to the host PBX and
signaling messages are passed between the host PBX and the Remote Gateway
9150 unit.
Exception: If Local Switchover is enabled, and the station-to-station call is
completed through the host PBX, signaling messages are passed between the
host PBX and Remote Gateway 9150 unit normally. However, the voice path is
established by the Remote Gateway 9150 unit without consuming host
connection bandwidth. The host PBX is aware that the call is active and tracks
the status of the telephone set.
If the call cannot be completed through the host PBX, you hear a reorder dial
tone.