PLANET VIP-1680 - Manual (Page 37)

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The T.38 is a “Real Time Group 3 FAX communication over IP
network” format. That’s meaning it’s a protocol for Fax over IP.
You have to enable this function.
H.323 RRQ TTL
This command configures the number of seconds that the
gateway should be considered active by the H.323 Gatekeeper.
The gateway transmits this value in the RRQ message to the
gatekeeper.The default value is “0”.
H.323 Registration type
There are 2 choices for this setting. “Gateway” means it will act
as the VIP-GW. “Terminal” means it will act as the IP phone
terminal.
H.323 Telephone Advance Configuration
Silence Compression
If this function is enabled, when silence is occurred for a period
of time, no data will be sent across the network during this
period in order to save bandwidth.
Dial Complete Tone Disable / Enable dialing complete tone.
Voice Codec option
The codec is used to compress the voice signal into data
packets. Each codec has different bandwidth requirement.
There are four kinds of codec, G.723, G.729AB, G.711_u and
G.711_A. The default value is G.723.
FXS Impedance The FXS provides 600/900 OHM impedances for selection.
FXO AC Impedance The FXO provides wild and complex ac termination
impedances for selection.
Phone (Line) in/out
volume
You can adjust the Phone (Line) in/out volume, range from -9db
to 9db.
FXO Tx/Rx Gain You can adjust the FXO Tx/Rx Gain, range from -6db to 6db.
UK PSTN release tone
detection
When you use the Gateway to UK, you can Enable this
selection to detection release tone.
Scenario description: Flash detection and generation duration
1. PSTN Call from PSTN to Office PBX and dial the extension 102 go to gateway.
2. Call to gateway of oome by Hotline.
3. Home user needs call transfer to extension number 101.
4. Dial flash and gateway FXS detect and generate the flash to PBX in office.
Flash Detection: Let you change flash detection (milliseconds) of gateway when phone
generate flash to FXS.
Flash Generation: Let you change flash generation time (milliseconds) for PBX detection.