Epygi QX50 User Manual

QX50/QX200/QX2000; (SW Version 6.0.x) 50
QX50/QX200/QX2000 Manual II: Administrator’s Guide
The
Codecs
table lists the voice and video codecs supported by the
QX IP PBX. Each table entry is assigned a checkbox that is used to
manipulate the entry, for example to disable, to move it up or down,
etc.
The table entries in bold type indicate codecs enabled for the selected
extension/attendant/conference. The enabled codecs participate in
codec negotiation at the call setup. The order of the enabled codecs is
very important. Each codec in the table has a higher priority than the
codecs below it, and a lower priority than the codecs above it. A
codec placed at the top of the table is used as the preferred codec.
When establishing a call, the system will try this codec first. If the
remote party does not support the preferred codec, the following
codecs will be tried out strictly in the order given in the Codecs table.
Please Note: Pay attention when configuring Auto Attendant Codecs
as they are used by virtual extensions for redirecting the incoming
calls.
Enable/Disable enables or disables the selected codec. Disabled
codecs do not participate in codec negotiation, i.e. they will never be
used to for call setup. At least one codec must be enabled; otherwise
voice communication with an extension/attendant/conference will
be impossible.
Fig.II- 70: Extension Codecs list
Move up moves the selected codec one level up, increasing the codec's priority.
Move down moves the selected codec one level down, decreasing the codec's priority.
Make preferred moves the selected codec to the top of the table, setting its priority to the highest. Clicking the Make preferred button when a disabled
codec is selected will first enable the codec and then move it to the top.
The following settings are available for user extensions and attendants only:
Out of Band DTMF Transport enables the DTMF code transmission in parallel with the voice stream. Destination received the DTMF code will play it
locally if it supports the feature too. This helps avoid DTMFs loss in case of heavy traffic. The feature is valuable for all codecs but it is especially
recommended for low bit rate codecs, such as G.729, G.726/16, etc.
Enable T.38 FAX enables the T.38 codec support of FAX transmission for incoming unified FAX messages (fax to mailbox) and remote IP devices
connected to Epygi unit via routing rules which using the target extension user settings (UES).
Enable Pass Through FAX enables the G.711 codec support for incoming unified FAX messages (fax to mailbox) and IP devices connected to the attached
IP line.
If both of the above checkboxes are enabled, the T.38 codec will be used as a preferred codec for FAX transmission. If it is not supported by the peer, the
G.711 codec will be used instead. For virtual extensions, the incoming FAX can only be stored in the extension's voice mailbox. To allow FAX to be stored in
the voice mailbox, the extension's user should not answer the incoming calls, so that they are forwarded to the voice mailbox.
Please Note: If both of the above checkboxes are disabled, no FAX transmission to the peer's voice mailbox will be possible.
Enable Pass Through Modem checkbox is available for the Auto Attendant and the extensions attached to the FXS lines only. This checkbox enables the
modem tone detection and the G.711 codec support for the data transmission from/to the modem attached to the line. During data transmission,
Silence
Suppression and Echo Cancellation are automatically disabled on the line.
Please Note: If the extension/attendant is intended to accept modem connections, disable the Enable T.38 FAX checkbox to allow the system to identify
the modem tones correctly. Otherwise, the modem connection may fail.
Force Self Codecs Preference for Inbound Calls checkbox enables the usage of your own preferred codecs (if available on both peers).
Secure RTP Settings are used to configure secure voice over IP communication on the QX IP PBX. The SRTP Policy drop down list is used to select the
secure IP connection policy. For IP phones, the following options are available:
• Make and accept only secure calls - only the secure calls will be generated and accepted.
• Make and accept only unsecure calls - only the unsecure calls will be generated and accepted.
• Try to establish secure calls, accept anything - system will try first to establish secure call, but will fallback to unsecure call if party doesn't
accept secure calls; both secure and unsecure incoming calls will be accepted, as requested by remote party, with the preference given to
establishing secure call.
• Make unsecure calls, accept anything - system will establish unsecure outgoing calls, but both secure and unsecure incoming calls will be
accepted as requested by remote party.
For bandwidth used by secure calls, see
Needed Bandwidth for IP Calls.

Epygi QX50 Specifications

General

Brand	Epygi
Model	QX50
Category	Network Hardware
Language	English