Loop-H3900S Multi Rate xDSL Data Transport

  • DTE speed of n x 64 Kbps, n=1 to max n, where max n= 4, 6, 8, 12, 24, 32 for 1 line, and n= 8, 12, 16, 24,32 for 2 lines.
    Distances vary by line speeds, wire thickness and environmental factors, depending on max n.
  • DTE interface (V.35, EIA530, X.21, RS449), E1
    interface, or Router interface.
  • Integral Router.
  • Uses industry standard 2B1Q line format.
  • A pair of Loop-H3900 can be configured as DTE at one end and E1 at the other in a bridge application.
  • Optional front panel keys and 2-line by 16-character display.
  • Each unit can be set to be either master or slave.
  • Multi-color LED indicators.
  • Compatible with Loop-H3900 rack version.
  • Standard compliance:
    For E1-HSDL, ETSI RTR/TM-03036 and ETSI TS 101 135 (formerly ETR 152).

The Loop-H3900 provides high speed digital transport over twisted copper pairs using 2B1Q technology. Versatility of
this series comes from a choice of digital interfaces and a choice of data rates, with the lower data rates applicable to
longer reaches. Repeaters are available for extending the reach beyond a single span.
This stand-alone version is intended for customer premises installation while the rack version is for central office use.
Either version, installed in pairs, can provide (a) an E1 link, with E1 interfaces, (b) a high speed data link with DTE
interfaces, or (c) a data access to E1 with DTE interface at one end and E1 at the other, as shown in the application illustrations.
The Loop-H also supports an integral router. This router can be connected directly to a LAN for transport of
information out to the network, avoiding the cost and space of an external router.
The Loop-H supports configuration and diagnostics using keypads and LCD display on the front panel, or from a local
or remote terminal. This execution of in-service diagnostics and fault isolation.

Ordering Information

To specify options, choose from list below: Note: RoHS compliant units are identified by the letter G appearing immediately at the end of ordering code.

(non RoHS compliant) (RoHS compliant) Description
11 Available Available V.35 DTE interface with M34 connector
22 Available Available V.35 DTE interface with DB25 connector
33 Available Available EIA530 DTE interface
44 Available Available for X.21 DTE interface
66 Available Available RS449/ V.36 DTE interface via conversion cable
88 Available Available T1 interface
E75 Available Available 75 ohm BNC E1 interface
E120 Available Available 120 ohm Twisted Pair RJ48C E1 interface
RT Available Available Router interface
BR Available Available Bridge interface


kk for multi-rate 256K -2320 Kbps (1 pair) mm for multi-rate 256K -1168 Kbps (2 pairs)


(non RoHS compliant) (RoHS compliant) Description
P1 Available Available -48 Vdc (20-60 Vdc)
P2 Available Available 100-240 Vac (For AC choose an appropriate power cord)
P3 Available Not available -48 Vdc with line power source
P4 Available Not available DC power from line
P5 Available Not available -48 Vdc with sealing current source
P6 Available Not available -48 Vdc with sealing current looped
P7 Available Not available 100-240 Vac with sealing current looped
P9 Available Available 100-240Vac and –48Vdc (20-60 Vdc) selectable (Choose an appropriate AC power cord)

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E1 Interface
Line Rate 2.048 Mbps ± 50 PPM Framing ITU G.704
Line Code HDB3 Connector BNC/RJ48C
Input Signal ITU G.703 Output Signal ITU G.703
Compatible with ISDN PRI NTUs Electrical 75Ω Coax/120Ω twisted pair
DTE Interface
Data Port Single DTE
Data Rate n x 64 Kbps
Connector EIA530, V.35, X.21,and RS449 via conversion cable
Router Interface
Number of Ports 1
Physical Interface 10/100 Base-T
Connector RJ45
Routing Protocol RIP-I, RIP-II
Data Rate N x 64 Kbps up to E1 capacity, 15,000 frames per second
Supported Protocols TCP/IP, PPP
Performance Monitor (E1)
Performance Store The last 24 hours performance in 15-minute intervals and last 7 days in 24-hour summary
Monitor Registers Network, E1/DTE, and remote site
Performance Reports Errored Second, Unavailable Second, Severe Errored Second
Alarm History Alarm Type, Loop1, Loop2, E1(LOS, ES, SES), and DTE Clock Loss
Alarm Queue Contains 40 alarm records which record the latest alarm type, and date & time
xDSL Line Interface
Full duplex with adaptive echo cancellation 2B1Q line coding
Unconditioned 19-26 AWG twisted pair
Line Rate available 272, 400, 528, 784, 1168, 1552, 2064, or 2320
Clock xDSL looped, Internal, or E1/DTE
Console Port
Connector DB9S at front panel
Electrical RS232 interface (DCE)
Protocol Menu driven VT-100 terminal
System Configuration Parameters (All in non-volatile memory)
Active Configuration Current working configuration
Default Configuration Manufacture default configuration
Diagnostics Test
xDSL Loopback To-DTE, To-LINE
DTE Loopback To-DTE, To-LINE
E1 Loopback To-E1, To-LINE
Slave Loopback DTE-Side, Line-Side (through EOC and V.54)
Front Panel
Keypad 4 keys: left arrow, right arrow, ESC, and ENTER
LCD 2-line by 16-character
Dimensions 216 x 55 x 285 mm (WxHxD)
Power 7 Watts max without line power or 22 Watts max with line power
DC Voltage -48 Vdc (20-60 Vdc)
AC Voltage 100-240 Vac
Temperature range 0 – 50 °C
Humidity 0 – 95% RH (non-condensing)
Mounting Desk-top stackable
Rack Mount tray available
EMI/EMC EN55022 EN50081-1 EN50082-1 Safety EN60950



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