Avaya Configuring Line Services Manuale Utente Pagina 50

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Configuring Line Services
2-14 114078 Rev. A
Figure 2-7. Token Ring LAN
Data Flow and Media Access Control
Devices on a Token Ring network get access to the media through token passing.
Token and data pass to each station on the ring, as follows:
1. The devices pass the token around the ring until one of them needs to transmit
data.
2. The device that wants to transmit takes the token and replaces it with a frame.
3. Each device passes the frame to the next device, until the frame reaches its
destination.
4. As the frame passes to the intended recipient, the recipient sets certain bits in
the frame to indicate that it received the frame.
5. The original sender of the frame strips the frame data off the ring and issues a
new token.
RI RO
RI RO
MAUs
LS0005A
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