Motorola VT2142 ユーザーズマニュアル

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If you do not understand a term or abbreviation, check the 

The VT2142 Voice Gateway is a stand-alone media terminal adapter (S-MTA) containing a home router:

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As an S-MTA, it converts analog voice signals to and from a standard telephone to digital data that can 
be transmitted through a broadband connection across the Internet. It provides an alternate means to 
make voice calls. 

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Its built-in router provides full network connectivity, a firewall, and VPN passthrough. 

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VT2142 prioritizes voice calls to enable simultaneous voice and data communication with no loss of 
voice call quality. For a description of the VT2142 features, see 

Yes. The VT2142 Voice Gateway supports 

, which is specified for 

®

 cable modems, and 

, which is used by most DSL providers. 

Yes. The VT2142 Voice Gateway supports 

 and 

, the most common VPN protocols. 

By default, the voice gateway blocks all unsolicited messages to the computer or local network as a standard 
security measure. However, for online games that require some unsolicited messages to be transmitted 
through the voice gateway, you can specify ports and IP addresses on which to allow unsolicited messages. 
The VT2142 enables you to set up virtual servers or a 

Most people can send and receive calls immediately after completing 

! You can configure your 

home or office network through a GUI using a connected computer configured to obtain its IP address using 
DHCP. Or, you can configure the computer statically to 192.168.15.xxx (xxx is from 2 to 254), subnet mask 
255.255.255.0, and default gateway 192.168.15.1. 

The VT2142 supports a firewall, RIP, port triggers, advanced ALGs such as RSVP, POP3, SNMP, and 
streaming media. No separate routers are needed. To connect more than one computer or other Ethernet 
device, an Ethernet hub, switch, or router is required.

Although VoIP service is typically best-effort, the VT2142 provides upstream voice prioritization to ensure that 
upstream voice data has priority over other Web data. This ensures good voice quality even during heavy 
upstream data transfers, such as e-mail synchronization or file sharing.