3-8
PA-4R-DTR Dedicated Token Ring Port Adapter Installation and Configuration
OL3590-02
Chapter 3 Removing and Installing Port Adapters
Connecting a PA-4R-DTR Interface Cable
Connecting a PA-4R-DTR Interface Cable
After installing the PA-4R-DTR, you need one Token Ring interface cable for each PA-4R-DTR
interface you want to use. Token Ring interface cables are not available from Cisco but are commercially
available through outside cable vendors.
Use the following procedure to connect RJ-45 cables to the PA-4R-DTR:
Step 1
Determine which PA-4R-DTR ports you want to use.
Note
The IBM Token Ring specifies a star topology with all end stations connected through a device called a
MSAU or Token Ring switch. IEEE 802.5 does not specify any topology, although most implementations
are based on a star configuration with end stations attached to a device called an MAU or to a Token Ring
switch. Also, IBM Token Ring specifies twisted-pair cabling, whereas IEEE 802.5 does not specify
media type. Most Token Ring networks use FTP cabling; however, some 4-Mbps networks use UTP
cable.
Step 2
Attach the port adapter end of a Token Ring interface cable, or other connection equipment, to the
interface port. (See
Figure 3-2
.)
Note
Port adapters have a handle attached, but this handle is not shown to allow a full view of detail on the
PA-4R-DTR port adapter faceplate.
Figure 3-2
Token Ring Interface Cable Connections
Caution
Each PA-4R-DTR interface must be configured for the same ring speed as the ring to which it is
connected (4 or 16 Mbps). If the PA-4R-DTR interface is set for a different speed, it causes the ring to
beacon, which brings down the ring.
Step 3
Attach the network end of the Token Ring interface cable to the appropriate Token Ring equipment at
your site (MAU, MSAU, or Token Ring switch).
This completes the procedure for attaching a PA-4R-DTR interface cable.
H11591
To RJ-45
port
Enabled
CPORT
FDX
4/16 Mbps
0
1
2
3
INS
CPORT
FDX
4/16 Mbps
INS
CPORT
FDX
4/16 Mbps
INS
CPORT
FDX
4/16 Mbps
INS