REQUIREMENTS AND SPECIFICATIONS
2-3
2.4 SETTING THE RING SPEED
The default ring speed setting for the TRMIM-62A is 16 Mbps. To set the
ring operating speed (4 or 16 Mbps), position the JP1 jumper on the
setting you want, as shown in Figure 2-1. See Section 2.4.1 for
information about how, under certain circumstances, a
management-module ring speed setting may override a different ring
speed you specify with the JP1 jumper for the TRMIM-62A.
Figure 2-1 Ring Speed Settings
Table 2-1 Recommended Lobe Lengths
Lobe Cable Type
Maximum Lobe Length
4 Mbps
16 Mbps
RG 62 Coaxial (Used Exclusively)
300 meters 100 meters
(1000 feet) (330 feet)
NOTE
The recommended lobe lengths in Table 2-1 may be exceeded
in an optimally designed coaxial terminal network, using RG 62
coaxial throughout and having a minimum number of BNC
connector splices on long lobe length cables.
JP1
4Mb
16Mb
1
2
3
1
2
3
4Mb
16Mb
For a 4Mb setting: slide the jumper over pins 1 & 2.
For a 16Mb setting: slide the jumper over pins 2 & 3.
NOTE: The pins are not
numbered on the component board.
