QX5
QXFXO4/QXISDN4/QXE1T1/QXFXS24; (SW Version 6.0.x)
47
QXFXO4/QXISDN4/QXE1T1/QXFXS24 Manual II: Administrator’s Guide
ISDN L3 Timers:
•
The
T302 Timer
text field requires the value for the T302
timer in milliseconds (digit values from 0 to 15000). It
indicates that the time frame system is waiting for a digit to
be dialed. When the timer expires, it initiates the call.
•
T309 Timer
requires the value for the T309 timer in
milliseconds (numeric values from 0 to 90000). It is
responsible for call steadiness during link disconnection
within the period equal to this timer value. If the value in this
field is zero (0), the T309 timer will be disabled.
•
T310 Timer
requires the value for the T310 timer in
milliseconds (numeric values from 1000 to 120000). It is
responsible for the outgoing call steadiness when CALL
PROCEEDING is already received from the destination but
call confirmation (ALERT, CONNECT, DISC or PROGRESS) has
not yet arrived.
•
Alert Guard Timeout
requires the value for the Alert Guard
Timer in milliseconds (numeric values from 0 to 500)
between CALL PROC and ALERT messages. Alert Guard Timer
it is used when QX is connected to a slow ISDN-PBX.
Recommended values are:
- fast connection (0ms);
- normal (150ms), default;
- slow ISDN-PBX (350ms);
- very slow ISDN-PBX (500ms).
Fig.II- 58: ISDN Wizard – l2&L3 Settings
The
Coding Type
drop down list allows you to select between
a-law
and
mu-law
coding types.
The
Switch Type
is another configuration parameter that depends on the Service Provider.
The
Passive Mode
checkbox is used to leave the ISDN Layer1 connection in the Slave mode. When this checkbox is selected, Layer1 remains idle when
calls are not available. When this checkbox is not selected, QX keeps its Layer1 always active. This checkbox enables the
Enable TEI Remove Procedure
and
Permanent TEI Value
checkboxes. With the
Enable TEI Remove Procedure
checkbox is selected, the trunk will lose the assigned TEI when entering
into passive mode on the Layer 2. With the
Permanent TEI Value
checkbox is selected, the trunk will keep the assigned TEI when entering into passive
mode on the Layer 2 or when QX detected ISDN link DOWN signal from carrier.
These checkboxes are present only for connection types different from
PTP (Point to Point)
selected on the first page of
ISDN Wizard
. In case if
PTP
(Point to Point)
connection type is selected on the first page of the ISDN Wizard, these two checkboxes are replaced with a
TEI Address
text field that
requires the channel number (digit values from 0 to 63) for connection establishment between the CO and the ISDN client.
Channel Selection
is used to select between the
Preferred
and
Exclusive
B channel selection methods. For
Preferred
channel selection, the CO answers
to the call request by the first available timeslot. With the
Exclusive
channel selection, the CO should feedback only by the timeslot asked in the call
request.
The
Bearer Establishment Procedure
drop down list allows selecting the session initiation method on the B channel. One of the following options can be
selected for the transmission path completion prior to receipt of a call acceptance indication:
•
on channel negotiation at the destination interface
•
on progress indication with in-band information
•
on call acceptance
The
Calling Party Type of Number
drop down list allows you to select the type identifying the origin of call.
The
Called Party Type of Number
drop down list allows you to select the type identifying the subaddress of the called party of the call.
The
Called Party Numbering Plan
and
Calling Party Numbering Plan
drop down lists correspondingly indicate the numbering plan of the called party's
and calling party's number.
The
Incoming Called Digits Size
text field indicates the number of received digits (in a range from 0 to 255) required to establish a call. When this field
has a “0” value, the system uses either the timeout defined in the T302 field or the
Sending Complete Information element
messages to establish a call.
Independent on the value in this field,
Sending Complete Information element
and the pound sign always result in call establishment.
The
Generate Progress tone on IP
checkbox selection will generate the progress tone to IP.
