![background image](http://html1.mh-extra.com/html/yoda/vg400r/vg400r_user-manual_3419581083.webp)
7.3 PBX related issues
There are some issues related to PBX system. There are: 1)
CP (Call Progress) Tone detection, and 2) Call Security.
7.3.1 CP Tone Detection
You may encounter a problem when your call goes to PBX via
a VoIP connection, such as the caller may already hang up
the phone but the PBX port is still active.
The cause of this problem may be due to the CP tone
mismatch. The VG cannot understand the Tone from PBX. So
it still considers the line is on and never hangs up.
Once this has happened, you may find a technical document
provided by your vendor that contains the corresponding
information and guides you to fix this problem.
7.3.2 Call Security
The IVG is a standard H.323 VoIP gateway that will allow any
standard H.323 device to make a VoIP connection to it. That
means no matter where you are, once you have a H.323
device such as another VG, or a software package like
Microsoft NetMeeting, you may make a VoIP call to this VG
any time once it connects to the Internet.
If the VG is only equipped with FXS port, then it should be very
little concerns regarding the unauthorized use of the VoIP link.
But once it is connected with either a PBX or PSTN line, you
may be opening a phone line for any Internet users to make
an unauthorized phone call. For example, one may make an
International call from Hong Kong to Europe through your VG
located in Singapore.
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Summary of Contents for VG400R
Page 1: ...VoIP Router User s Guide i...
Page 11: ...Click NAT for all the WAN LAN related settings and VG 400R will display the following 7...
Page 12: ...Click WAN for WAN Configuration Menu and VG 400R will display the following screen 8...
Page 13: ...Click Fixed IP to enter all fix IP related information 9...
Page 18: ...Click NAT for all the WAN LAN related settings and VG 400R will display as follows 14...
Page 19: ...Click WAN for WAN Configuration Menu and VG 400R will display the following screen 15...
Page 20: ...Click PPPoE and prepare to key in all PPPoE related information 16...
Page 24: ...Click WAN for WAN Configuration Menu and VG 400R will display the following screen 20...
Page 25: ...Click DHCP Client for DHCP Client Settings and VG 400R will display the following screen 21...
Page 27: ...Reboot the VG 400R when all the above settings are stored successfully 23...
Page 30: ...Click LAN for LAN Configuration Menu 26...
Page 32: ...Reboot the system if all the above settings are saved 28...
Page 37: ...Reboot the system to make these changes effective 33...
Page 40: ...Reboot the system to make these changes effective 36...
Page 43: ...Reboot the system to make these changes effective 39...
Page 46: ...Reboot the system to make these changes effective 42...
Page 48: ...Use Workgroup and Packet Filter Table settings to control the user s access authority 44...
Page 55: ...Click Store to store information in the Flash memory 51...
Page 56: ...Reboot the VG 400R when all the above settings are stored successfully 52...
Page 61: ...Click VOIP for all the telephony related settings and VG 400R will display as follows 57...
Page 64: ...Choose Add Telephone and Select and VG 400R will display the following screen 60...
Page 85: ...This page is intentionally left blank 81...
Page 86: ...82...