QSG | Quick Start Guide: PB-ISDN
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5.4 Clock Sources
PacketBand ISDN Chassis must be configured to either receive clock from an ISDN
interface or generate clock internally. Different priorities can be set for each port, so if
one port is unavailable, PacketBand ISDN Chassis will clock from the next available port
in the Clock Source hierarchy
1.
Select
Clock Sources
from the
Terminal
port menu.
2.
Enter values into the table to denote the clocking priority of each interface on
PacketBand ISDN Chassis. The values which may be entered are as follows:
0
Interface Not Used
1-32
ISDN Ports
33-36
External Clock Ports (optional)
101-108
Logical Links 101-108
3.
Click
OK
to save the setting.
Warning:
Clock Sources must be configured correctly to ensure error-free
operation when PacketBand ISDN Chassis is connected to any other clock-
locked system or network. Please consult the full PacketBand ISDN manual if
unsure how to configure Clock Sources.
5.5 PRI Ports
All PRI ports are NT by default (connect to TE device). To use the ports as TE, each port
must be manually set to TE and a crossover cable must be used. Each port has a single
LED to show its status:
Flashing once/sec:
Layer 1 and 2 established
Flashing five times/sec: Layer 1 established, trying to synchronize with Layer 2
On:
Calls active on interface
1.
Click on an enabled PRI port.
2.
The configuration settings for the port are displayed.
3.
Configure the settings as required for the port.
4.
Click
OK
to save the settings.
