- 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
- 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
- Compatible with
Loop-H3900 rack version.
- Standard compliance:
For E1-HSDL, ETSI RTR/TM-03036 and ETSI TS 101 135 (formerly ETR
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
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
LOOP-H3900 MULTI RATE xDSL
PRODUCT SPECIFICATION (Stand Alone)
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
Data Port Single DTE
Data Rate n x 64 Kbps
Connector EIA530, V.35, X.21,and RS449 via conversion cable
Number of Ports 1
Physical Interface 10/100 Base-T
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
Alarm History Alarm Type, Loop1, Loop2, E1(LOS, ES, SES), and DTE
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
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
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)
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