LTU-2 - Cutter Networks - Call:727-398-5252 for Your … Line Termination Unit LTU-2 SPECIFICATIONS...
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E1 Line Termination Unit LTU-2 FEATURES • 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 DESCRIPTION • 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. Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com
Transcript of LTU-2 - Cutter Networks - Call:727-398-5252 for Your … Line Termination Unit LTU-2 SPECIFICATIONS...
E1 Line Termination Unit
LTU-2
FEATURES
• Extended dynamic rangeof up to 2.2 km to thenearest repeater
• Supports up to -45 dB at1024 kbps
• Simplex line power feed forE1 repeaters
• Complies with ITU G.703
• V.54 diagnostics
• V.52 test pattern generatorand ERR LED indication
• Front panel jack access
• Line protection circuit
• Surge protection complieswith ITU K.17
• Standalone and rackmodule version
• AC or DC powered
DESCRIPTION
• The LTU-2 Line Termination Unitconnects local equipment suchas PABXs and E1 multiplexersto the E1 public network, withcomplete network protection. Inaddition, LTU-2 provides linepower feed for E1 repeaterssuch as RPT-0. When coupledwith 14 repeaters, LTU-2extends an E1 line up to 20 km(12.5 miles).
• LTU-2 meets all therequirements of ITU G.703 andis compatible with almost all PTTprovided E1 services. Surge andline protection circuitry complieswith ITU Recommendation K.17.
• LTU-2 supports up to 45 dB ofattenuation at 1024 kbps (halfthe E1 bit rate). For a 22 AWGcable this represents amaximum distance of 2.2 km tothe nearest repeater.
• Two constant-current built-in DC
power supplies of -48 VDC and-72 VDC (strap-selectable) areavailable for the repeater DCfeed. The power feed featurescurrent limit protection withsimplex line power on the sameE1 line. -48 VDC power feedsupports up to four RPT-0 units;-72 VDC power feed supports upto seven units.
• Diagnostic capabilities complywith ITU V.54 and include localanalog loopback and remotedigital loopback, activated via afront panel switch. The PATTswitch activates an internal511-bit pseudo-random testpattern for complete end-to-endintegrity testing. The ERR LEDindicates each bit error detected.
• Front panel jacks allow easynetwork access for moreextensive testing using externaltest equipment.
• LTU-2 is available as a desktopunit or as a card for installationin the LTU-MN-114 19" cardcage (see Ordering). LTU-MN-114 can accommodate up to 14cards. An optional rack-mountadapter kit enables installation ofone or two standalone units in a19" rack.
Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com
E1 Line Termination Unit
LTU-2
SPECIFICATIONS
• Network InterfaceData rate: 2.048 MbpsLine code: Bipolar, HDB3Impedance:
Balanced: 120ΩUnbalanced: 75Ω
Signal level:Receive: 0 to -45 dBmTransmit:Balanced: ±3V ±10%Unbalanced:±2.37V ±10%
Connector:Balanced: 15-pin D-type,
maleUnbalanced: Two BNC
coaxialSurge protection: Per ITU K.17
• DTE InterfaceData rate: 2.048 Mbps
±50 ppmLine code: Bipolar, HDB3Impedance:
Balanced: 120ΩUnbalanced: 75Ω
Signal level:Receive: 0 to -10 dBmTransmit:Balanced: ±3V ±10%Unbalanced:±2.37V ±10%
Connector:Balanced: 15-pin D-type,
femaleUnbalanced: Two BNC
coaxial
• Jitter PerformanceTransparent between thenetwork and the DTE side
APPLICATION
• DiagnosticsITU V.54 loopbacks, activatedvia front panel switches
REM: Remote digitalloopback
ANA: Local analog loopback on network side
ITU V.52 test patternPATT: 511 bit pseudo
random test pattern withError LED indicationBantam jacks (front panel):
EQ-IN, EQ-OUT,NET-IN, NET-OUT
• Alarm ResponseLoss of signal on DTE with
network response as AIS, orLoss of signal on network with
DTE response as AIS (strap-selectable)
• IndicatorsPWR PowerTEST TestERR Bit Error for PATTtestDTE-LOS DTE loss of signalNET-LOS Network loss of signalNET-AIS Network AISNET-10-3 Bipolar violation error
check
• Power Supply115/230 VAC (±10%)47 to 63 Hz, 13 VA;-48 VDC (±10%) input
• DC Feed-48 VDC with 50, 100, 150 mA
constant current source, for simplex line power feeding of up to four RPT-0 units with 19 AWG cable (strap-selectable)
-72 VDC for support of up to seven RPT-0 units with 19 AWG cable. Available with 115/230 VAC option
• PhysicalLTU-2SA :Height: 44 mm / 1.7 inWidth: 193 mm / 8.0 inDepth: 240 mm / 7.6 inWeight: 1.4 kg / 3.1 lbLTU-2R:Dimensions: fit the LTU-MN-114 card cageWeight: 3.6 kg / 10.1lb
• EnvironmentTemperature: 0-50οC / 32-122oFHumidity: Up to 90%,
non-condensing
ORDERING
LTU-2SA/*E1 Line Termination Unit,standalone with internal powersupplyLTU-2RE1 Line Termination Unit, card forthe LTU-MN-114 card cage* Specify power supply:
115 for 115 VAC operation230 for 230 VAC operation48 for -48 VDC operation
RM-9Hardware for mounting one or twounits in a 19" rack.
629-100-03/98
1998 RAD Data Communications Ltd. Specifications are subject to change without prior notice.
Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com
