Huawei BM2022, User Manual

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Chapter 10 The VoIP Account Screens
BM2022 Users Guide
163
The following table describes the labels in this screen.
10.7 FAX
Click VoIP > Account > FAX to configure which standard the account uses for fax services.
Figure 87
VoIP > Account > FAX
The following table describes the labels in this screen.
10.8 Technical Reference
The following section contains additional technical information about the BM2022 features
described in this chapter.
10.8.1 SIP Call Progression with Session Timer
The following figure displays the basic steps in the setup and tear down of a SIP call with session
timer supported by both peers. The UPDATE method is used to refresh the session. A calls B and
uses proxy server P. Messages include Session Expiry (SE) and Minimum Session Expiry (MSE)
Table 70 VoIP > Account > Dialing
LABEL DESCRIPTION
Inter-digit
Timeout Set the time in seconds (1~5) the BM2022 waits for each digit input of a
complete callee number after you press the first key on the phone.
If the BM2022 cannot receive the next digit entered within this time period,
the BM2022 processes digits you have dialed.
First-digit
Timeout Set the number of seconds (5~30) for the BM2022 to wait for you to start
dialing a number after you pick up the telephone receiver. If you do not dial
any number within that time period, the dial tone becomes a busy signal. Put
back the receiver and pick it up again if you want to make a new call.
Table 71
VoIP > Account > FAX
LABEL DESCRIPTION
Options Select which standard the BM2022 uses to handle faxes. The peer devices must also
use standard.
G.711A Pass Through - Select this option to send and receive fax messages over the
network or Internet using VoIP (G.711a). By encoding fax data as audio data, faxes
may be susceptible to packet loss and other errors. However, as this standard is
considerably older than T.38, it is more compatible with older obsolete systems.
T.38 FAX Relay - BM2022 encodes fax messages to T.38 packets and sends as UDP
packets through IP networks. This provides better quality, but it may have
interoperability problems.