Line Terminating Unit (LTU)


The 108600 is a rugged, light weight transmission unit for Eurocom networks, which converts digital signals from Eurocom A/B to Eurocom C and visa versa. It is used when the distance between relevant equipment units is too long for Eurocom A/B transmissions,or when standard cable lengths are too short. It is also used when equipment units with different interface types are to be connected. The TDM bit-rate can be selected between 256, 512, 1024 or 2048 Kilobits per second. When transmitting at the highest bit rate (2048 kilobits/s) and with the use of a dry field cable, the cable length can be up to 1000 meters. At lower bit rates, the cable length may be increased.

The 108700-01 is a rugged, lightweight transmission unit utilizing time division multiplexing to convert up to four duplex EuroCom D/1 “B” interfaces to a single switch-selectable choice of EuroCom D/1 interface C, or E1 per ITU G.703. It is rack mountable and suitable for either mobile or fixed installations. The LTU is also suited for applications where the distance between equipment units is too long for EuroCom D/1 interface B transmissions or when standard cable lengths are too short. Additionally it is used in applications where equipment units with different interface types are to be connected. The LTU is powered by 24 VDC and is supplied with a mating power cable. A 2-wire, 16 Kb/s engineered orderwire (EuroCom “F” EOW) capability is provided.

The 108700-02 LTU-V.35 is a rugged, lightweight transmission unit, that coverts the clock, data, control and handshaking signals of a single ITU-T V.35 interface to EuroCom D/1 interface C. It is rack mountable and suitable for either mobile or fixed installations. The LTU-V.35 is suitable for applications where the distance between equipment units is too long for ITU-T V.35 transmissions or when standard cable lengths are too short. The LTU is powered by 24 VDC and supplied with mating power cable.

System Interconnect Diagram


Line Terminating Unit Specifications

Description  
B-Interface Balance inputs, AMI-code 256, 512, 1024 or 2048 kilobits per second. Input line is 50 meters maximum.
C-Interface Maximum cable length is 1000 meters with new, dry cable. Maximum bit error rate is 1 x 10-6 connection to socket on front panel or binding posts on the rear of the unit.
Power Supply 24 VDC nominal, 12 to 36 VDC maximum
Power Consumption 5 watts maximum
Operation
Temperature
-40˚C to +55˚C
Storage
Temperature
-55˚C to +70˚C
EOW Connection to Field Telephone (LB)

 

Description LTU LTU 4 Channel LTU-V.35
Model 108600 108700-01 108700-02
Power 24 VDC
Nominal
24 VDC
Nominal
24 VDC
Nominal
Input
Interface
EuroCom
D/1 "A/B"
Up to 4 EuroCom
D/1 "B" Interfaces
ITU-T V.35
Output
Interface
EuroCom
D/1 "C"
Single EuroCom D/1 "C" interface or one ITU G.703 E1 Interface EuroCom
D/1 "C"
Power
Consumption
5 watts max    
Operating
Temperature
-40˚C to +55˚C -40˚C to +55˚C -40˚C to +55˚C
Storage
Temperature
-55˚C to +70˚C -55˚C to +70˚C -55˚C to +70˚C
EOW EuroCom "F" EuroCom "F" N/A
Weight      
  • B-Interface
    Balance inputs, AMI-code 256, 512, 1024 or 2048 kilobits per second. Input line is 50 meters maximum
  • C-Interface
    Maximum cable length is 1000 meters with new, dry cable. Maximum bit error rate is 1 x 10-6 connection to socket on front panel or binding posts on the rear of the unit
  • Power Supply
    24 VDC nominal, 12 to 36 VDC maximum
  • Power Consumption
    5 watts Maximum
  • Operation Temperature
    -40˚C to +55˚C
  • Storage Temperature
    -55˚C to +70˚C
  • EOW
    Connection for Field Telephone (LB)

Physical Characteristics

  • Weight: Less than 1.2kgs
  • Dimensions (cm): 11.0 x 23.5 x 8.9
  • 4 units fit side by side in a standard 19 inch rack