TELES VoIP Box BRI Series, Reference Manual

Page: 103 / 226

5 Additional VoIP parameters
VoIPBox DSL / VoIPBox BRI – version 21.0.009 Page 103
VoipEcl=<ms>
This parameter defines the required tail length for echo cancellation. The following
values in ms are possible:
32
64 (default)
128
VoipInputGain=<num>
The volume of VoIP calls coming from ISDN, POTS or mobile. The range is 0-63. The
default value of 32 is 0 dB.
VoipIntrastar=<mode>
Enter Yes to activate the IntraSTAR feature. When the IP connection results in poor
quality, an ISDN call is sent to the peer and the voice data is automatically transmitted
via ISDN.
VoipMediaWaitForConnect=<mode>
This parameter allows you to influence the system’s behavior in relation to voice chan-
nel negotiation (RTP stream).
The following settings are possible:
No (default): RTP data is transmitted immediately after negotiation for RTP. SIP: Early
Media is activated; SDP is sent with 183 or 180.
Yes: The negotiation of RTP data is sent only after the connection has been estab-
lished. SIP: SDP is sent only with 200 and ack.
Tone: The VoIP peer or the connected PBX requires generation of inband signaling
tones (alert, busy, release).
Weaktone: The VoIP peer or the connected PBX requires generation of inband signal-
ing tones (alert, busy, release). When B party announces "inband info available" in
alert message, the tone from the B party overrides the tone that has been generated
by the gateway.
If Tone is entered, the tones are not played in the direction of the PBX if RTP is already
exchanged before connect (inband is switched through).
Bear in mind that the parameter SWITCH in the VoIP controller’s Subscriber line must
be removed if the tones are played for the PBX.
If Tone is entered and the tones are played to VoIP, the VoIP media channel cannot be
released following an ISDN call disconnect as long as the tones are being transmitted.
This can result in CDR errors on the peer side.
VoipOverflow=<name>
When the value entered in VoipMaxChan is reached, all overflow calls will be sent to
the profile defined here. An alternative VoIP profile can also be used if the default pro-
file can no longer be used as a result of poor quality.
Table 5.7 Customized parameters: VoIP quality (page 3 of 5)
VoIP Quality Parameters