Datasheet

6
Installing High-Speed Serial Interface Cables
OL-3435-02
Connecting the Null Modem Cable
Connecting the Null Modem Cable
To connect two routers directly, back-to-back, connect the null modem cable between the HSSI ports in
two separate routers. The two routers must be in the same location and can be two Cisco 4000 series
routers, two Cisco 7000 series routers, two Cisco 7200 series routers, two Cisco 7500 series, two
Cisco uBR7200 series universal broadband routers, two Cisco 7400 series Internet routers, or any two
routers of each router series listed. With a null modem connection, you can verify the operation of the
HSSI or to link the routers directly in order to build a larger node.
Figure 6 shows cable connection for two HIP boards, and Figure 7 shows cable connection for two
NP-1HSSI network processor modules.
Figure 6 Connecting a Null Modem Cable to the HIP
Figure 7 Connecting a Null Modem Cable to the NP-1HSSI
H2634
Null modem cable
HIPHIP
H9376
AUX CONSOLE
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
HSSI module
100 MB Ethernet moduleEthernet module
10BASE-T
TX
RX
AUI
LNK
POL
TX
RX
AUI
LNK
POL
ETHERNET AUI
PORT-0
PORT-1
RJ45(GRN)
MII (YEL)
LINK
RX
TX
100BaseTX
100 MB ETHERNET
(RJ45
ONLY)
(RJ45
ONLY)
MEDIUM INDEPENDENT INTERFACE
(MII)
HSSI
LOOP CONN TXD TXC RXD RXC
AUX CONSOLE
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
HSSI module
HSSI
null modem
cable
HSSI port
HSSI port
100 MB Ethernet moduleEthernet module
10BASE-T
TX
RX
AUI
LNK
POL
TX
RX
AUI
LNK
POL
ETHERNET AUI
PORT-0
PORT-1
RJ45(GRN)
MII (YEL)
LINK
RX
TX
100BaseTX
100 MB ETHERNET
(RJ45
ONLY)
(RJ45
ONLY)
MEDIUM INDEPENDENT INTERFACE
(MII)
HSSI
LOOP CONN TXD TXC RXD RXC