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RAD
IMX-4T1 T1 Inverse
Multiplexer |
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- The IMX-4T1 Inverse
Multiplexer enables splitting and transmitting a
high speed data channel of up to 5.888 Mbps, over up
to four T1 links. IMX-4T1 spans the bandwidth gap
between T1 and T3, providing increased bandwidth
where services higher than T1 are either not
available or are too expensive.
- IMX-4T1 can be ordered
with either 2 or 4 T1 links. For long range
applications, a built-in CSU for each of the links
is available.
- Differential delays of
up to 64 msec between the T1 lines are tolerated.
IMX-4T1 compensates for such delays, and the
original stream is reconstructed. The end-to-end
delay of the IMX-4T1 is not more than the maximum
differential delay between the links.
- The automatic rate
fallback feature ensures that the logical channel
remains open even if individual T1 links fail, by
automatically dropping to the next lower rate. When
failed links are recovered, IMX-4T1 automatically
returns to the original rate.
- IMX-4T1 provides
immediate connection to installed applications. The
user data port is available with the following sync
data interfaces: V.35, RS-530, V.36/RS-449, X.21 or
HSSI. The data rate can be any multiple of 1.472
Mbps, up to a total of 5.888 Mbps.
- An Ethernet Bridge
port can be ordered instead of a sync data port
interface. The Ethernet bridge port option allows
direct connection to LAN and provides self learning
and extensive packet filtering. The Ethernet bridge
has 10BaseT (UTP) interface, and fully complies with
IEEE 802.3.
- The Ethernet bridge
uses an Enhanced Tinygram compression algorithm,
enabling it to utilize bandwidth more efficiently
and thus reduce the required number of T1 lines.
- Two user-selectable
clock modes are available for the sync type data
port:
- DCE: IMX-4T1 provides both TX and RX clocks to
user DTE.
- External-DCE: IMX-4T1 provides RX clock to user
while receiving TX clock from user.
- System timing options
include:
- Internal clock: the internal oscillator is the
source for T1 links.
- Loopback: the T1 transmit clock is derived from
one of the T1 receive clocks.
- Station clock: the T1 transmit clock is the source
for framed/unframed all "1"s or G.703
compatible.
- Setup, control,
status, alarms and diagnostic information are
provided via the front panel LCD display or an ASCII
terminal/Telnet.
- Diagnostics
capabilities include:
- Local/remote data port loopback
- Local/remote T1 links loopback
- V.52 BERT.
IMX-4T1 also supports
the T1 network loopback per AT&T 62411 (in-band
code activated), with statistical diagnostic
capability according to AT&T PUB 54016.
- The supervisory port
supports dial-in/dial-out for remote out-of-band
configuration and monitoring (dial-in), as well as
for alarm reporting (dial-out).
- Compliance is provided
for ACCUNET Fractional T45 Service (AT&T), which
allows choosing new transmission speeds higher than
T1 rates.
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