Nortel Networks 9150 - Manual (Page 23)

Remote Gateway 9150 Installation and Administration Guide xix
January 2005 About this document
Product overview
The Remote Gateway 9150 unit provides full-featured host PBX services to as
many as 32 users located in your office.
The Remote Gateway 9150 solution consists of the following components:
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Reach Line Card (RLC)
The RLC is installed in the PBX at the host location and relays voice and
signaling information from the digital telephones connected at the Remote
Gateway 9150 site to the PBX at the host site.
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Remote Gateway 9150 unit
The Remote Gateway 9150 unit is installed in your office. It relays voice
and signaling information between the digital telephones in your office to
the PBX at the host location.
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10BaseT Ethernet and ISDN Basic Rate Interface (BRI) connections
These connections provide the voice and data connections between the
Remote Gateway 9150 unit and the host PBX.
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ISDN BRI trunk interface modules are supported for the following:
— U interface
— S/T interface
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optional Digital Signal Processor (DSP) application modules
You can add these modules to increase the system’s voice processing
capacity.
The Remote Gateway 9150 unit uses the Voice over IP technology to route voice
conversation and telephone set control signals between your office and the host
PBX over your existing IP data network.
The Remote Gateway 9150 unit can also use the PSTN to route calls if:
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the voice Quality of Service (QoS) degrades below predefined thresholds
In this case, Nortel’s patented QoS Transitioning Technology automatically
transitions calls to the PSTN when the voice QoS degrades. Calls transition
back to the IP network when the QoS returns to normal.
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you are not yet ready to use the IP network to route voice calls
You can configure the Remote Gateway 9150 unit to use only the PSTN,
and implement the IP network functionality when you are ready.