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Introduction
1-33360-A2-GB20-20 December 1996
Physical Description
The 336x Series consists of a Model 3360 NTU
(2-port), a Model 3364 NTU (4-port), and a Model 3365
NTU (1-port).
Front Panel
The E1 NTU front panel (Figure 1-1) contains,
• One 2-line, 16-alphanumeric-character-per-line
liquid crystal display (LCD)
• One 7-button keypad (three Function and four
directional keys)
• Twelve light-emitting diodes (LEDs)
• Six test jacks
Rear Panel
The E1 NTU rear panel contains the connectors and
switches required for the operation of the E1 NTU
(Figures 1-2, 1-3, and 1-4). The connectors and switches
are described in Table 1-1.
F1 F2 F3
OK
FAIL TEST SIG1 OOF ALRM
NETWORK RXD
SIG2 SIG ALRM PDVOOF BPV
LCD
Lp1
Lp2
In
Out
In
Out
HDSL
LINE
E1
LINE
E1
MON
DTR TXD CTS RTS
496-14728-0
1
KEYPAD
TEST JACKS LEDs
Figure 1-1. Front Panel