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ACCULINK 336x E1 NTU
2-8 December 1996 3360-A2-GB20-20
Cabling Examples
The E1 NTU is supplied with an ac power module.
Optional cables that you can order from the company
are described in Appendix D, Pin Assignments.
Figure 2-12 illustrates some cabling examples.
NOTE
The 120Ω/75Ω switch selects
either the 120 ohm balanced
G.703 interface or the 75 ohm
unbalanced G.703 interface. The
RX SHIELD switch selects either
an “open” or “earth” shield
connection for the 75 ohm RX
interface. (This switch must be set
to “open” when using the 120 ohm
interface.)
COM
PORT
RX SHIELD
OPEN
COM
PORT
RX SHIELD
OPEN
POWER
HDSL
NETWORK
120Ω
G.703
AUX
PORT
OUT
75Ω
120Ω
IN
EARTH
75Ω
TX RX
75Ω
PORT 1 PORT 2CLOCK IN
CAUTION: AUX PORT OR COM PORT MUST
NOT BE CONNECTED TO HDSL NETWORK
PORT 3 PORT 4
PORT 1 PORT 2CLOCK IN
CAUTION: AUX PORT OR COM PORT MUST
NOT BE CONNECTED TO HDSL NETWORK
495-1474
6
TO AC
POWER
MODULE
TO DC
POWER
(OPTIONAL)
3100-F1-550
3100-F1-540
NTU
NTU
SERIAL
PORT
COM PORT
HDSL
NETWORK
COM PORT
HDSL
NETWORK
3100 SERIES
FRONT PANEL
EMULATION
SOFTWARE,
3100-C1-010
NOTE:
3100-F1-520
SNMP
MANAGER
OR
HDSL HDSL
NETWORK
POWER
HDSL
NETWORK
120Ω
G.703
AUX
PORT
OUT
75Ω
120Ω
IN
EARTH
75Ω
TX RX
75Ω
PORT 3 PORT 4
Figure 2-12. Cabling Examples