IEEE
TOKEN RING ACCESS METHOD AND PHYSICAL LAYER SPECIFICATION Std 802.5t-2000
Copyright © 2000 IEEE. All rights reserved.
9
The functions used to support Configurations 1 and 2 are covered as follows:
— The DTR Station using the TXI Access Protocol when operating at 4 Mbit/s or 16 Mbit/s is defined
in 9.1, 9.2, and 9.7.1, and when operating at the HMR is defined in 9.1, 9.2, 9.7.2, 9.8, and 13.9.
— The C-Port in Port Mode using the TXI Access Protocol when operating at 4 Mbit/s or 16 Mbit/s is
defined in 9.1, 9.3, and 9.7.1, and when operating at the HMR is defined in 9.1, 9.3, 9.7.2, 9.8,
and 13.9.
— The C-Port in Station Emulation Mode using the TXI Access Protocol when operating at 4 Mbit/s or
16 Mbit/s is defined in 9.1, 9.2, 9.3, and 9.7.1, and when operating at the HMR is defined in 9.1,
9.2, 9.3, 9.7.2, 9.8, and 13.9.
The functions used to support Configurations 3 and 4 are covered as follows:
— The DTR Station using the TKP Access Protocol, when operating at 4 Mbit/s or 16 Mbit/s, is de-
fined in 9.1 and 9.6.
— The C-Port in Port Mode using the TKP Access Protocol, when operating at 4 Mbit/s or 16 Mbit/s,
is defined in 9.1, 9.3, 9.4, and 9.7.1.
— The C-Port in Station Emulation Mode using the TKP Access Protocol, when operating at 4 Mbit/s
or 16 Mbit/s, is defined in 9.1, 9.3, 9.5, and 9.7.1.
— The Classic Station, which uses only the TKP Access Protocol operating at 4 Mbit/s or 16 Mbit/s, is
defined in Clause 4.
— The Classic Concentrator, which uses only the TKP Access Protocol operating at 4 Mbit/s or
16 Mbit/s, is defined in Clause 8.
Clause 9 structure
The remainder of Clause 9 is structured as follows:
— Subclause 9.1 describes the common DTR Station and C-Port functions required to support the TXI
Access Protocol when operating at 4 Mbit/s, 16 Mbit/s, or the HMR, and the TKP Access Protocol
when operating at 4 Mbit/s or 16 Mbit/s.
The description of the Classic Station is found in Clause 4 and is not covered in Clause 9.
— Subclause 9.2 specifies the DTR Station and the C-Port in Station Emulation Mode using the TXI
Access Protocol when operating at 4 Mbit/s, 16 Mbit/s, or the HMR.
Annex L contains informative diagrams of the Low-Level Finite State Machines (FSMs) represent-
ing the SMAC contained in the Join, Transmit, and Monitor Station Operation Tables defined in 9.2.
— Subclause 9.3 specifies the C-Port in Port Mode using the TXI Access Protocol when operating at
4 Mbit/s, 16 Mbit/s, or the HMR, and the TKP Access Protocol when operating at 4 Mbit/s or
16 Mbit/s. Subclause 9.3 defines the Join, Transmit, and Monitor functions for the TXI Access Pro-
tocol. Subclause 9.3 also defines the Join function for the TKP Access Protocol; the Transmit and
Monitor functions for the TKP Access Protocol are defined in 9.4.
Annex M contains informative diagrams of the Low-Level FSMs representing the PMAC contained
in the Join, Transmit, and Monitor Port Operation Tables defined in 9.3.
— Subclause 9.4 specifies the C-Port in Port Mode using the TKP Access Protocol when operating at
4 Mbit/s or 16 Mbit/s. Subclause 9.4 defines the Transmit and Monitor functions; the Join function
is defined in 9.3.