Fractional Fiber Optic Modem FH/FL – F Technical Training
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Fractional Fiber Optic Modem FH/FL – F
Technical Training
FH/FL - F - Technical Features I
General:
• Fractional Fiber Optic modem
• max. 2 Mbps I/F speed
• achievable distances 90 km (1550 SM)
• user data rate n x 56 / 64 Kbps, max. 2 Mbps
• transmission of user data + mgmt. data (parallel or in timeslot)
• mandatory management via VT100 terminal and SNMP
• LEDs and loops acc. to V.54
• standalone unit and rack mount card
Line Interfaces
• Multimode 850 nm or 1300 nm
– cable diameter 62,5 / 125 m (core/cladding)
– graded or step index fiber
– SC, FC-PC or ST connector
– LED transmitter
• Singlemode 1300 nm or 1550 nm
– cable diameter 9 / 125 m (core/cladding)
– standard SM fiber acc. to G. 651
– SC, FC-PC or ST connector
– LED or Laser transmitter
User Interface:• V.24 (max. 128 Kbps), V.35, V.36, Basic Rate Interface,
Ethernet Bridge, HDSL
• Data rate: E1: n x 64 (n=1..32) acc. to G.704
T1: n x 64 (n=1..24), n x 56 (n=1..24) acc. to
ANSI
• DTE/DCE switchable (if supported by I/F module)
FH/FL-F - Distances
Frontpanel
Monitoring
Normal status = Link fully operational
Monitoring
Interface Port Monitoring
Local Signal:status of the local interface
Remote Signal:status of the line linkorstatus of the line link and the remote interface
Mainbord Layout
Data Rate and Clock Source
Interface Module
VT100 Connector Pinout
• Digital Loop: Loops data from the I/F RX line
back to the I/F TX line
• Line Loop: Sets a line loop at the local unit
• Remote Loop: Sets a line loop at the remote unit
FH/FL - F - Loop Features
DL
LL
RL
LL
Local Unit
Remote Unit
Local Unit
Remote Unit
Local Unit
Remote Unit
Technical Data
G.703G.704
V.35n x 64 Kbps
GM-F
V.35n x 64 Kbps
GM-F
G.703G.704
G.703
G.703G.704
V.35n x 64 Kbps
GM-F
V.35n x 64 Kbps
G.703
Fiber Optic
Fiber Optic
FH/FL-P
FH/FL-P
FH/FL-P
FH/FL-F
FH/FL - F - Basic Function I
G.703G.704
V.35
V.35
Fiber Optic
FH/FL-F
FH/FL-F
V.35
FH/FL-P
FH/FL-P
GM-F
V.35
GM-F
G.703G.704
• FH/FL-F in point-to-point application makes no
sense!
FH/FL - F - Basic Function II
• Only necessary if user wants a data
rate n x 64 Kbps (e.g.192 Kbps)
V.35@ 192 Kbps
FH/FL-F
FH/FL-F
V.35@ 192 Kbps
FH/FL - F - Standard Application
E1 / T1
V.35n x 64 Kbps
Fiber Optic
FH/FL-P
FH/FL-P
Fiber Optic
V.35n x 64 Kbps
E1 / T1
FH/FL-F
FH/FL-F
19 “ Rack – Setup (RA-X)
19 “ Rack - Alarm Contact / DC Power Pinout
19 “ Rack - Techn. Data
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