3Com VCX V7111, Руководство пользователя

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3Com
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VCX V7111 VoIP Gateway User Guide
ƒ Frequency response in transmit and receive direction
ƒ Hook thresholds
ƒ Ringing generation and detection parameters
This means, for example, that changing impedance matching or hybrid balance does not
require hardware modifications, so that a single device is able to meet requirements for
different markets. The digital design of the filters and gain stages also ensures high
reliability, no drifts (over temperature or time) and simple variations between different line
types.
In future software releases, it is to be expanded to consist of different sets of line
parameters, which can be selected in the
ini file, for each port.
Use the parameter CountryCoefficients (described Table 47 ) to configure the FXO
coefficients.
User Information File
The User Information file maps PBX extensions (connected to the V7111 gateway) to global
IP phone numbers (alphanumerical). In this context, a global IP number serves as a routing
identifier for calls in the IP World. The PBX extension uses this mapping to emulate the
behavior of an IP phone. Note that the mapping mechanism is disabled by default and must
be activated by using the parameter EnableUserInfoUsage (described in
General
Parameters ).
Each line in the file represents a mapping rule of a single PBX extension (up to 100 rules can
be configured). Each line includes five items separated with commas. The items are
described in
Table 100 . An example of a User Information file is shown in Figure 144 .
Each PBX extension registers separately (a REGISTER message is sent for each entry, only
if AuthenticationMode is set to Per Endpoint) using the IP number in the From / To headers.
The REGISTER messages are sent gradually (that is, initially, the gateway sends requests
according to the maximum number of allowed SIP dialogs (configured by the parameter
NumberOfActiveDialogs), after each received response, the subsequent request is sent).
Therefore, no more than NumberOfActiveDialogs dialogs are active simultaneously. The
username and password are used for SIP Authentication when required.
The calling number of outgoing Tel to IP calls is first translated to an IP number and then (if
defined) the manipulation rules are performed. The Display Name is used in the From
header in addition to the IP number.
The called number of incoming IP to Tel calls is translated to a PBX extension only after
manipulation rules (if defined) are performed.
The User Information file is a text file (the file size must not exceed 10,800 bytes) that can be
loaded using the
ini file (UserInfoFileName, described in Table 78 ), the Embedded Web
Server (see Auxiliary Files ) or by using the automatic update mechanism (UserInfoFileURL,
see Automatic Update Mechanism ).