Verilink QPRI 2921 (880-503143-001) Product Manual - Manual (Page 11)

Verilink QPRI 2921 1-1
Chapter
1
QPRI 2921 Dual-Port ISDN Primary
Rate Interface
The QPRI 2921 application module working in conjunction with an
NCM 2000 controller module provides your AS2000 system with
critical network backup capability that includes ISDN PRI access.
NOTE: The ISDN capability of the QPRI 2921 application module is
only accessible through the NCM 2000 Controller Menu.
The QPRI accepts high-speed data from local area networks, host
mainframes, and other types of data terminal equipment. The
aggregate data rate from terminal equipment can be one of the
following:
Applications
In dial-backup mode, the QPRI 2921 provides an alternate ISDN
route when regular T1 lines are unavailable. The QPRI 2921 can
also be used to designate a reserve leased T1 as a backup.
Figure 1-1 ISDN Dial-Backup Application
T1 Timeslots Data Rate
n = 1—23 or 1—24 depending
on NFAS configuration
n × 56 kbit/s (up to 1.344 Mbit/s) (n = 1–24)
n = 1—23 or 1—24 depending
on NFAS configuration
n × 64 kbit/s (up to 1.536 Mbit/s) (n = 1–24)
ISDN Switched
Network
Network
Services
NCM
2000
DRPI
2922
DIDCSU
2912
DIDCSU
2912
TA
C
2010
TA
C
2010
TA
C
2010
TA
C
2010
TA
C
2010
DIU
2130 DIU
2130 DIU
2130 DIU
2130