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FEATURES
- The LTU-2 Line Termination Unit connects local
equipment such as PABXs and E1 multiplexers to the E1 public network, with
complete network protection. In addition, LTU-2 provides line power feed
for E1 repeaters such as RPT-0. When coupled with 14 repeaters, LTU-2
extends an E1 line up to 20 km (12.5 miles).
- LTU-2 meets all the requirements of ITU G.703 and
is compatible with almost all PTT provided E1 services. Surge and line
protection circuitry complies with ITU Recommendation K.17.
- LTU-2 supports up to 45 dB of attenuation at 1024
kbps (half the E1 bit rate). For a 22 AWG cable this represents a maximum
distance of 2.2 km to the nearest repeater.
- Two constant-current built-in DC power supplies of
-48 VDC and -72 VDC (strap-selectable) are available for the repeater DC
feed. The power feed features current limit protection with simplex line
power on the same E1 line. -48 VDC power feed supports up to four RPT-0
units; -72 VDC power feed supports up to seven units.
- Diagnostic capabilities comply with ITU V.54 and
include local analog loopback and remote digital loopback, activated via a
front panel switch. The PATT switch activates an internal 511-bit
pseudo-random test pattern for complete end-to-end integrity testing. The
ERR LED indicates each bit error detected.
- Front panel jacks allow easy network access for
more extensive testing using external test equipment.
- LTU-2 is available as a desktop unit or as a card
for installation in the LTU-MN-114 19" card cage (see Ordering).
LTU-MN-114 can accommodate up to 14 cards. An optional rack-mount adapter
kit enables installation of one or two standalone units in a 19" rack.
SPECIFICATIONS
- Extended dynamic range of up to 2.2 km to the
nearest repeater
- Supports up to -45 dB at 1024 kbps
- Simplex line power feed for E1 repeaters
- Complies with ITU G.703
- V.54 diagnostics
- V.52 test pattern generator and ERR LED indication
- Front panel jack access
- Line protection circuit
- Surge protection complies with ITU K.17
- Standalone and rack module version
- AC or DC powered
LTU-2SA/*
E1 Line Termination Unit, standalone with
internal power supply
LTU-2R
E1 Line Termination Unit, card for the LTU-MN-114 card cage
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Specify power supply:
115 for 115 VAC operation
230 for 230 VAC operation
48 for -48 VDC operation |
RM-9
Hardware for mounting one or two units in a 19" rack.
ORDERING
LTU-2R
LTU-2SA/115
LTU-2SA/230
LTU-2SA/48
APPLICATIONS
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