CHAPTER 15 Media
Mediant 4000 SBC | User's Manual
2.
Configure the [V34FaxTransportType] parameter to [2] (Bypass).
➢
To use bypass mode for V.34 faxes, and T.38 for T.30 faxes:
1.
On the Fax/Modem/CID Settings page, do the following:
●
Set the 'Fax Transport Mode' parameter to
T.38 Relay
[FaxTransportMode = 1].
●
Set the 'V.22 Modem Transport Type' parameter to
Enable Bypass
[V22ModemTransportType = 2].
●
Set the 'V.23 Modem Transport Type' parameter to
Enable Bypass
[V23ModemTransportType = 2].
●
Set the 'V.32 Modem Transport Type' parameter to
Enable Bypass
[V32ModemTransportType = 2].
●
Set the 'V.34 Modem Transport Type' parameter to
Enable Bypass
[V34ModemTransportType = 2].
2.
Configure the [V34FaxTransportType] parameter to [2] (Bypass).
Relay Mode for T.30 and V.34 Faxes
In this scenario, V.34 fax machines are forced to use their backward compatibility with T.30 faxes
and operate in the slower T.30 mode.
➢
To use T.38 mode for V.34 and T.30 faxes:
1.
On the Fax/Modem/CID Settings page, do the following:
●
Set the 'Fax Transport Mode' parameter to
T.38 Relay
(FaxTransportMode = 1).
●
Set the 'V.22 Modem Transport Type' parameter to
Disable
(V22ModemTransportType =
0).
●
Set the 'V.23 Modem Transport Type' parameter to
Disable
(V23ModemTransportType =
0).
●
Set the 'V.32 Modem Transport Type' parameter to
Disable
(V32ModemTransportType =
0).
●
Set the 'V.34 Modem Transport Type' parameter to
Disable
(V34ModemTransportType =
0).
2.
Configure the [V34FaxTransportType] parameter to [1] (Relay).
➢
To allow V.34 fax relay over T.38:
■
Set the 'SIP T.38 Version' parameter to Version 3 (SIPT38Version = 3).
➢
To force V.34 fax machines to use their backward compatibility with T.30 faxes and
operate in the slower T.30 mode:
■
Set the 'SIP T.38 Version' parameter to Version 0 (SIPT38Version = 0).
For SBC calls, the device forwards T.38 Version 3 transparently (as is) to the other leg
(i.e., no transcoding).
V.34 Fax Relay for SG3 Fax Machines
Super Group 3 (SG3) is a standard for fax machines that support speeds of up to 33.6 kbps through
V.34 half duplex (HD) modulation. The following procedure describes how to configure V.34 (SG3)
fax relay support based on ITU Specification T.38 version 3.
- 166 -
Summary of Contents for Mediant 4000 SBC
Page 1: ...User s Manual AudioCodes Series of Session Border Controllers SBC Mediant 4000 SBC Version 7 2...
Page 40: ...Part I Getting Started with Initial Connectivity...
Page 48: ...Part II Management Tools...
Page 113: ...Part III General System Settings...
Page 118: ...Part IV General VoIP Configuration...
Page 525: ...Part V Session Border Controller Application...
Page 654: ...Part VI Cloud Resilience Package...
Page 663: ...Part VII High Availability System...
Page 685: ...Part VIII Maintenance...
Page 759: ...Part IX Status Performance Monitoring and Reporting...
Page 844: ...Part X Diagnostics...
Page 888: ...Part XI Appendix...
