3Com V3000 ANALOG, Руководство по установке

Страница: 45 / 252

NBX Cards and Devices 45
■
Console — This DB-9 connector provides an RS-232 (DCE) TTY
terminal connection for maintenance access.
If you require an alternative (bare wire-end) cable to use with the ISDN
PRI Digital Line Card, contact your 3Com NBX Voice-Authorized Partner.
CAUTION: This equipment does not operate when the main power fails.
BRI-ST Digital Line
Card
The ISDN BRI-ST (Basic Rate Interface) Digital Line Card ( Figure 12 ) has
four separate ports, each of which accommodates two B channels and
one D channel. Each B channel carries user data at 64 Kbps and the
D channel operates at 16 Kbps. If the two B channels are bonded, the
transmission rate is 128 Kbps.
The 3C10164C-ST must reside on the same subnet as the
NCP. The
3C10164D-ST
can be initialized and communicate with the NCP via IP
(layer-3) or Ethernet (layer-2). If the NCP and the 3C10164D-ST card are
on the same Ethernet segment, then layer-2 is used for the control path.
If they are located on different IP subnets, then layer-3 is used. The
3C10164D-ST can receive its IP information through a DHCP server. The
server must be configured for DHCP option 184 operation to provide the
NCP IP address to the card. For more details about configuring a remote
card, see the
NBX Administrator’s Guide.
Figure 12 BRI-ST Digital Line Card (3C10164C-ST)
Figure 13 BRI-ST Digital Line Card (3C10164D-ST)
CAUTION: The BRI-ST Digital Line Cards are not approved for use in the
United States or Canada.
CAUTION: This equipment does not operate when the main power fails.
3C10164C 3Com NBX Quad BRI-S/T Card
CONSOLE
D
B1
B2
1 3 2
4
D
B1
B2
D
B1
B2
D
B1
B2