2-30 Cisco 7010 Hardware Installation and Maintenance
Preparing Network Connections
Table 2-14
IBM Token Ring and IEEE 802.5 Comparison
In the typical Token Ring network shown in Figure 2-19, lobe cables connect each Token Ring
station (TRIP port) to the MSAU (or MAU), and patch cables connect adjacent MSAUs (or MAUs)
to form one large ring.
Figure 2-19
Token Ring Network Physical Connections
Token Ring and IEEE 802.5 are token-passing networks, which move a small frame (called a token)
around the network. Possession of the token grants the right to transmit; a station with information
to transmit must wait until it detects a free token passing by.
When all stations on the ring are idle, the token packet is labeled as a free token. If the station
receiving the token has no information to send, it simply passes the free token to the next station. A
station that does have information to transmit seizes the token, alters a bit of the token frame (which
changes the free token to a busy token), appends the information it wishes to transmit, and then sends
this information to the next station on the ring. The busy token, with the information frame,
circulates the ring until it reaches the intended destination station, which copies the information for
further processing and passes the busy token and information frame back out to the ring.
Network Type
Data Rates
Stations/ Segment
Topology
Media
Signaling
Access
Method
Encoding
IBM Token Ring
network
4, 16 Mbps
260 shielded twisted pair
72 unshielded twisted pair
Star
Twisted pair
Baseband
Token
passing
Differential
Manchester
IEEE 802.5
network
4, 16 Mbps
250
Not specified
Not specified
Baseband
Token
passing
Differential
Manchester
Ring
in
1
2
3
4
5
6
7
8
Ring
out
Stations
Ring
in
1
2
3
4
5
6
7
8
Ring
out
Stations
MAU or MSAU
Ring
in
1
2
3
4
5
6
7
8
Ring
out
Stations
Ring
in
1
2
3
4
5
6
7
8
Ring
out
Stations
Lobe
cables
Patch
cables
H2058
MAU or MSAU
MAU or MSAU
MAU or MSAU
Содержание TelePresence Server 7010
Страница 10: ...x Cisco 7010 Hardware Installation and Maintenence ...
Страница 14: ...iv Cisco 7010 Hardware Installation and Maintenance Document Conventions ...
Страница 112: ...2 52 Cisco 7010 Hardware Installation and Maintenance Initial Configuration Information Page ________ ...
Страница 148: ...3 36 Cisco 7010 Hardware Installation and Maintenance Using the Flash Memory Card ...
Страница 158: ...4 10 Cisco 7010 Hardware Installation and Maintenance Troubleshooting the Processor Subsystem ...
Страница 242: ...5 84 Cisco 7010 Hardware Installation and Maintenance Replacing Internal Components ...
Страница 258: ...A 16 Cisco 7010 Hardware Installation and Maintenance MIP Interface Cable Pinouts ...
Страница 270: ...B 12 Cisco 7010 Hardware Installation and Maintenance Interface Processor LEDs ...
Страница 274: ...C 4 Cisco 7000 Hardware Installation and Maintenance ...
Страница 287: ...Index 13 ...