Specifications

RADring
Installation & Operation Manual Functional Description
3/11/98 12:33 Access Modules Functional Description 2-21
CH1 CH2
CML/NM
RESET
TL-4/S
1
3
2
4
2
4
1
3
U
T
P
S
T
P
TIO
U
T
P
S
T
P
TIO
1
2
3
4
TL-4/U
1
3
2
4
1
3
2
4
1
2
3
4
TL-4/CX
UTP
4Mbps-180m
16Mbps- 90m
4Mbps- 375m
16Mbps- 180m
STP
4Mbps- 200m
16Mbps- 100m
RG-62
RI RO
Figure 2-15 TL-4 Passive Access Modules
TL-2/ED - Two
port Extended
Distance Lobe
Access Modules
The TL-2 module provides two independent lobe interfaces for connection
of two stations over extended lobe distances. The IEEE 802.5 signal from
the station is regenerated at each lobe interface, guaranteeing the lobe
distances in the table below.
Each lobe circuit is normally in bypass unless the attached station requests
insertion into the ring. Before insertion into the ring the station carries out
the Lobe Media Test according to the IEEE 802.5 protocol. Due to the TL-2
lobe regenerating the test signal, the station can access the ring, even if it is
at a distance that would preclude its insertion on a regular passive lobe.
Extended distance and passive lobe access modules can be mixed in the
same hub, so that extended distance modules can be used according to the
lobe distance requirement. When using mixed modules, a repeater such as
the TJA module should be used (see Chapter 6).
The TL-2 modules also support the LAU-4 and satellite configurations for
expanding the number of stations that can be connected to a single lobe
circuit.