User guide

Chapter 3 – Installing Software
MultiVOIP® Voice/Fax over IP Gateways 23
To configure channels:
1. From the Select Channel drop-down list, select the channel you want to configure.
2. In the Fax/Modem Parameters group:
a. From the Set Max Baud Rate drop-down list, select a rate that matches a fax machine (2400 to 14400
bps).
b. Do not change the setting in the Fax Volume drop-down menu. Such changes can adversely impact the
modem’s operation.
c. From the Jitter Value drop-down list, select the desired time for packet reassembly.
d. From the Mode drop-down list, select T.38 or FRF 11.
e. To allow modem traffic through the VOIP system, check the Modem Relay Enable checkbox.
3. Do not change settings in the Dtmf group. Adjusting Voice Gain and DTMF may adversely affect quality.
4. In the Selected Coder drop-down list, select a coder or allow automatic negotiation
5. In the Advance Features group:
● To not send silence packets, check Silence Compression.
● To remove echo and improve voice quality, select Echo Cancellation.
● To recover some bad packets, check Forward Error Correction.
6. Use the Auto Call / OffHook Alert group to allow automatically calling of a remote VOIP without dialing. This
is described in greater detail in Chapter 4.
7. In the Dynamic Jitter group, change values if necessary (details in Chapter 4)
● Select any Automatic Disconnection options needed to ensure lines are not left “open”
● Configurable Payload Types are best left at their defaults. Not in the –SS models
8. Configure each channel as described in the preceding steps. You can use the Copy Channel button to quickly
transfer the settings from one channel to another.
Setting Interface Parameters
The Interface parameters control the telephony settings that are applied to the individual MultiVOIP channels.
Configure each channel for the type of interface you are using. Channel 1 is selected by default.
Note: Features are available or unavailable depending on the selected interface type. The one option available
for all interface types is the inter digit timer option. This option defines the maximum time that the unit waits
before mapping the dialed digits to an entry in the phone book database. If too much time elapses between
digits, and the wrong numbers are mapped, you hear a rapid busy signal. If this happens, hang up and dial again.
If the Interface Type is FXS (Loop Start), a station device such as an analog telephone, fax machine or KTS (Key
Telephone System) is connected to an analog channel. The FXS options group is active.
If the Interface Type is FXO, the Dialing Options Regeneration, Flash Hook Timer and Ring Count groups are
enabled. The FXO Ring Count allows you to set the number of rings before the unit answers the incoming call.
Check with your local in-house phone personnel to verify whether your local PBX dial signaling is pulse or tone
(DTMF). The Flash Hook Options Generation setting allows you to enter the time, in milliseconds, for the
duration of the flash hook signal.
If the Interface Type is E & M, you are connecting to an analog E & M trunk on your PBX. Check with your in-
house phone personnel to determine the signaling type (Dial Tone or Wink) and if it is 2-wire or 4-wire. The –SS
and –FX series do not support E&M or DID operation.