Interface cards descriptions
49
SmartNode 1000 and 2000 Series Getting Started Guide
1 • General Information
Interface modes
The interface can be used in two different modes, namely NET or USR. The NET mode means the interface
performs network-side signaling, whereas USR mode means user-side signaling as described in
table 16
. For
cabling, see appendix C,
“Cabling”
on page 142.
When changing the interface mode from NET to USR, or USR to NET, the clock source setting is automati-
cally adjusted. For NET the clock becomes master and for USR the clock becomes slave.
You can manually override these default settings of the clock: see the documents Software Configuration Guide. The
next time that the interface mode is changed the clock source changes back automatically to the default again.
Table 18. Interface modes
Task
NET Mode
USR Mode
Clocking Mode Master: generates line clocking
Slave: accepts line clocking
Time Slot
Interface responsible for time slot selection Interface accepts time slot selection
