Cisco 1751 Краткое руководство по эксплуатации - Страница 8
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Installing WAN and Voice Interface Cards
When the interface is configured as NT and is connecting to a TE device, the cable must have the transmit
Note
and receive pins swapped (crossover cable). (See
Table 3
ISDN BRI NT/TE
Pin 3/T+
Pin 4/R+
Pin 5/R-
Pin 6/T-
Connect the other end to the RJ-45 wall outlet.
Step 3
ISDN BRI Card LEDs
ISDN BRI voice interface cards have three LEDs, as listed in
Table 4
LED
B1
B2
OK
If you have additional cards to install, proceed to the appropriate sections in this manual. When you have
finished all installations, see the Cisco 1751 Router Software Configuration Guide available on the
Documentation CD-ROM.
Determining Voice Port Numbering
Enter the show voice port command to identify the port numbers of voice interfaces installed in your
router:
Router# show voice port slot-number/port
Figure 8 on page 9
Cisco 1751 Voice-over-IP Quick Start Guide
8
Interface Pin Numbers and Functions
NT Interface (use
straight-through cable)
Pin 3/R+
Pin 4/R+
Pin 5/T-
Pin 6/R-
ISDN BRI Voice Interface Card LEDs
Meaning
Call active on B1 channel
Call active on B2 channel
Interface is connected to an
ISDN network
shows Cisco 1751 router slot numbering.
Table
3.)
TE Interface (use
crossover cable)
Pin 3/T+
Pin 4/R+
Pin 5/R-
Pin 6/T-
Table
4.
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