3Com VCX V7111 User Manual - Hapter

3Com VCX V7111 VoIP SIP Gateway User Manual 

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HAPTER 

1:

VCX

V7111

SIP

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ATEWAY 

O

VERVIEW

This document provides you with the information on installation, configuration, and operation 

of the 24FXS 24-port, 8FXS and 8FXO 8-port, 4FXS and 4FXO 4-port, and 2FXS 2-port 

VoIP media gateways. As these units have similar functionality, except for the number of 

channels and some minor features, they are referred to collectively as the VCX V7111 SIP 

Gateway. It is expected that the readers are familiar with regular telephony and data 

networking concepts.  

Gateway Description 

The 3Com VCX V7111 SIP Gateway Series

Analog VoIP gateways are cost-effective, 

cutting-edge technology solutions, providing superior voice quality and optimized packet 

voice streaming (voice, fax and data traffic) over the same IP network. These gateways use 

the award-winning, field-proven DSP voice compression technology used in other 3Com 

series products. 

The VCX V7111 SIP Gateway gateways incorporate up to 24 analog ports for connection, 

either directly to an enterprise PBX (VCX V7111/FXO), to phones, or to fax (VCX 

V7111/FXS), supporting up to 24 simultaneous VoIP calls.  

Additionally, the VCX V7111 SIP Gateway units are equipped with a 10/100 Base-TX 

Ethernet port for connection to the network. 

The VCX V7111 SIP Gateway gateways are best suited for small to medium size 

enterprises, branch offices or for residential media gateway solutions. 

The VCX V7111 SIP gateways enable Users to make free local or international telephone/fax 

calls between the distributed company offices, using their existing telephones/fax. These 

calls are routed over the existing network ensuring that voice traffic uses minimum 

bandwidth. 

The VCX V7111 SIP gateways are very compact devices that can be installed as a desk-top 

unit (see 

Mounting the VCX V7111 on a Desktop

 on page

 28

) or on the wall (see 

Mounting 

the FXO and 2FXS, 4FXS, and 8FXS on a Wall

 on page 

30

) or in a 19-inch rack (see 

Installing the FXO and 2FXS, 4FXS, and 8FXS in a 19-inch Rack

 on page 

29

 and 

Installing 

the 24FXS in a 19-inch Rack

 on page 

29

). 

The VCX V7111 SIP gateways support SIP or H.323 protocols, enabling the deployment of 

“voice over IP” solutions in environments where each enterprise or residential location is 

provided with a simple media gateway. 

This provides the enterprise with a telephone connection (e.g., RJ-11), and the capability to 

transmit the voice and telephony signals over a packet network. 

The 24FXS supports up to 24 analog telephone loop start FXS ports, shown in 

Figure 1

.