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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
cabling, see
Appendix B on page
Task
Clocking Mode Master: generates line clocking
Time Slot
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.
IC-T1V-0 T1 gateway interface card for ISDN PRI (circuit switching only)
This card is based on the IC-T1V interface card (see
PRI"
on page 48), but it does not provide VoIP channels. The card supports full ISDN signaling. All B-Chan-
nels (64 kbps) can be used for calls within the same card, or between this card and other cards installed in the
same SmartNode Gateway chassis. No VoIP calls can be made can be made to destinations outside the Smart-
Node chassis.
IC-T1V-15 15-channel T1 gateway interface card for ISDN PRI
This card is based on the IC-T1V interface card (see
PRI"
on page 48). It provides 15 simultaneous VoIP channels. The card supports full ISDN signaling, and all
B-Channels (64 kbps time slots) can be used for calls within the same card, or between this card and other
cards installed in the same SmartNode Gateway chassis. VoIP calls are limited to 15 at a time.
50
165.
Table 21. Interface modes
NET Mode
Interface responsible for time slot selection Interface accepts time slot selection
SmartNode 1000 and 2000 Series Getting Started Guide
Slave: accepts line clocking
"IC-T1V 23-channel T1 gateway interface card for ISDN
"IC-T1V 23-channel T1 gateway interface card for ISDN
table
19. For
USR Mode
Interface cards descriptions
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