Specifications

Voice Settings 5-37
Chapter 5 - Xcelerator IP Configuration
Xcelerator IP Administrator Manual March 2007
AUDIO
The Audio settings are used to set the following Audio-related options that will be applied
to the FXS and PSTN lines.
Country -- Country setting is used to determine not only the Caller ID detection /
transmission method but also ring/tone cadence/frequency.
Voice Active Detection -- VAD is a technique that detects the absence of audio and
conserved bandwidth by preventing the transmission of "silence packets" over the
network. Normally, this is set to On (enable).
Packet Loss Concealment -- Enable or Disable
Echo Cancellation Tail Length -- Echo cancellation time; 0 value disables the Echo
Canceller.
RTP Packet Size -- 10/20/.../60 ms
Codec Priority -- Xcelerator IP supports audio CODECS in G711u, G711a, G723,
G729a, but only one CODEC can be active at a time. The administrator can set the
priority of the CODEC protocols to be used on the system.
FXS - The FXS settings are used to set the following FXS-related options:
Fax Support -- Xcelerator IP supports FAX/modem tone detection with G.711 mode.
Call ID Method -- Xcelerator IP provides the ability to detect the calling party
identification provided by PSTN lines. It also transmits the calling party identification
to POTS ports. There are four choices: NONE | DTMF_BR | DTMF_AR |FSK
Input Volume Gain -- value range: -20 to 20. If the value is increased by 1, the
actual analog-voice will become louder by 0.5dB. If the value is decreased by 1, the
analog voice will become lower by 0.5dB.
Output Volume Gain -- value range: -20 to 20. If the value is increased by 1, the
actual analog-voice will become louder by 0.5dB. If the value is decreased by 1, the
analog voice will become lower by 0.5dB.
Inter-digit Timeout -- The inter-digit timeout value Its range is from 0 to 30
seconds. This is the elapsed time between dialing digits on the IP2007 before the call
will time out and issue re-order tone.
FXO - The FXO settings are used to set the following central office line options:
Input Volume Gain -- value range: -20 to 20
Output Volume Gain -- value range: -20 to 20
Call Abandon Time -- For every PSTN/FXO call, Xcelerator IP supports monitoring
the call status on trunks. If the remote party hangs up, the ongoing call must be
terminated. The PSTN line monitor is accomplished through monitoring the loop-break
signal or busy tone. The value range is: 100/200/…/1000 ms.
Ring Recognition Time -- The Ring Recognition timer determines the minimum ring
duration recognized as a valid incoming ring on a PSTN port. Shorter ring signals are
ignored. The timer range is 200ms to 60ms in 40ms increments.
Delay Ring Time -- The Delay Ring timer allows the Central Office to send ICLID
before the call is answered. Once the timer expires, the programmed extensions will
ring and the ICLID number will be sent to the ringing extensions. The timer range is 3
to 6 seconds in 0.5 second increments.
CO Line Flash -- *3 will emulate a Centrex CO line flash (switch hook flash).