Avaya BCM50 Konfigurationsanleitung PDF herunterladen (Seite 403)

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Chapter 47 T.38 fax 403

Networking Configuration Guide

Figure 119 Media Gateways panel

T.38 Fax restrictions

Voice mail and T.38 FoIP share a maximum of eight fax ports. Voice mail supports only two fax

ports.

If you allow fax messaging for the local VoIP gateway, you must be aware of the guidelines in

“Operational notes and restrictions” on page 403 when you send and receive fax messages over

VoIP trunks. For more information, see “VoIP trunk gateways” on page 367.

Operational notes and restrictions

Some fax machines cannot send faxes successfully over VoIP (T.38) trunks to the following

destinations:

• CallPilot mailboxes

• CallPilot mailboxes accessed through auto-attendant

• Fax Transfer (calls transferred to a system fax device through the auto-attendant)

Use the following tips to avoid this problem:

• Avoid using manual dial on the originating fax machine. In some fax machines, dialing

manually results in a much shorter call time-out.

Note: For more details and instructions on how to configure media

gateways, see “Media Gateways panel” on page 413.

Note: Fax tones that broadcast through a telephone speaker can disrupt calls on other

telephones using VoIP trunks near the fax machine. Follow these suggestions to reduce the

chance of your VoIP calls being dropped because of fax tone interference:

• Locate the fax machine away from other telephones.

• Turn the speaker volume on the fax machine to the lowest level, or off.

Note: Fax tones can be recorded in a voice mail box. In the rare event that fax tones are

captured in a voice mail message, opening that message from a telephone using a VoIP

trunk can cause the connection to fail.

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