Quadro Manual I: Installation Guide
Step 2-C: Using ISDN Lines
Quadro2x, 2xi; Quadro4x, 4xi; Quadro16x, 16xi (SW Version 5.3.x)
42
The
ISDN Wizard
–
L2&L3 Settings
is used for advanced configuration only and contains
L2&L3 Settings. This page only appears when the
Advanced Settings
checkbox is se-
lected on the previous page of the wizard. This page contains the following components:
Fig. II-36: ISDN Wizard – L2&L3 Settings
ISDN L2 Timers:
•
Excessive Ack. Delay T200
configures the period in milliseconds (numeric values
from 500 to 9999) between the transmitted signaling packet and its acknowledgement
received.
•
Idle Timer
T203
configures the period in milliseconds (numeric values from 1000 to
99999) for the ISDN client idle timeout.
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 PRO-
CEEDING 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 millise-
conds (numeric values from 0 to 500) between CALL PROC and ALERT messages.
Alert Guard Timer
it is used when Quadro is connected to a slow ISDN-PBX.
Recommended values are:
- fast connection (0ms);
- normal (150ms), default;
