Specifications

RADring
Installation & Operation Manual System Installation
3/11/98 12:29 Replacing The Ventilation Fan 3-13
3.11 Module Placement Guidelines
Management
Cards
The CML/NM card is always installed in the far right-hand slot (slot 21).
In order to use the CML/IB or CML/IB - E card, a CML/NM with compatible
software and hardware versions must be installed. Up to two rings per hub
may be installed with CML/IB cards. CML/IB and CML/IB - E can be placed
anywhere within the ring.
Ring Separation
Install the TL/2 and TL/4 modules serving one ring side by side, in one
continuous cluster. There can be empty slots between modules; the signal
continues along the backplane to the next station which is inserted into the
ring.
Make sure not to mix data rates within a single ring.
Each individual ring contains a group of TL-2 and /or TL-4 modules,
surrounded by ring terminators. The Ring In module is on the left side of the
ring and the Ring Out module is on the right. Ring separation is achieved in
two ways:
Lobe access module termination
TL modules can be configured as a ring terminator, providing separation
between the module group to the left (with which the access module is
associated), and the module group to the right (with which the access
module is not associated). Termination of the module provides loopback of
main to back up path in both directions.
RI/RO Module Termination
The TIO, TFR, TCR and TFC modules can be configured as Ring In or Ring
Out modules. By inserting one or two RI/RO modules between two groups
of lobe access modules two separate rings are automatically formed.
The TCP option should be set to "ON" on both the RI and RO modules in
order to enable wraparound to a backup path in case of cable malfunction.
Before removing a ring separator (RI/RO module or terminated lobe access
module), make sure that the adjacent ring is properly terminated. Otherwise,
two rings may be joined together, causing unexpected errors (e.g., mixed
data rates).
Jitter Attenuator
Placement
The TJA module can be placed anywhere within the ring to provide
guaranteed lobe distances, higher station counts and simplified network
design.
For design recommendations, refer to Chapter 6.
Ethernet Modules
Placement
The Ethernet modules can be installed in any slot except for the far
right- hand slot (slot 21).