IMXi-4 inverse multiplexer ( 4 T1s or 4 E1s or 4 SHDSL links) from RAD
The IMXi-4 inverse multiplexer (mux 4 T1s " IMXI-4/AC/ETU/T1
" or 4 E1s or 4 SHDSL links) is a user-friendly, easy-to-install, plug-and-play unit that splits a
high-speed single data channel of up to 8.316 Mbps, and transmits it over up to four E1/T1 or SHDSL links. IMXi-4
from RAD bridges the
bandwidth gap between E1/T1 and E3/T3 services. The IMXi-4 also provides the flexibility to increase throughput from one line to up to four lines as network requirements grow.
Key features of IMXi-4 (IMXI-4/AC/ETU/T1)
inverse multiplexer ( mux )- 4 T1s or 4
E1s from RAD:
IMXi-4 transparently connects distant Fast Ethernet LANs over SHDSL, E1, or T1 links, and supports IP routing or user-selectable MAC bridging with VLAN support.
Network line interface options include E1 (balanced or unbalanced), T1, or SHDSL. When an unbalanced E1 interface
is ordered, a BNC converter cable is supplied with the unit.
Unframed mode (G.703) can be configured to increase the bandwidth of each E1 link.
E1/T1 interfaces include an integral LTU/CSU for extended range and can also emulate DSU interfaces.
IMXi-4 inverse mux Transmits a single high-speed data channel over up to four 2-wire SHDSL or E1/T1 links
High throughput, up to 8.316 Mbps at extended ranges over SHDSL
Automatic rate fallback ensures transmission even if an individual link fails
User-friendly, easy-to-install, plug-and-play unit, ETSI rack installation ready
User-selectable bridge or router in the IMXi-4 connects Ethernet/Fast Ethernet LANs and VLANs to E1/T1 or SHDSL services
Inband or out-of-band (SNMP, Telnet) management and local management via ASCII terminal
Manageable via RADview-EMS, RAD’s client-server, CORBA-based Element Management System
Built-in CSU/LTU or CSU/DSU option
Cross-link correction using the IMXi-4 inverse multiplexer ( mux )- 4 T1s or 4
E1s from RAD
Comprehensive diagnostics and statistics on all ports
Compensates for differential delays of up to 200 msec
Enables VLAN management and supports VLAN stacking and tagging
Supports unframed mode in E1 links to increase payload bandwidth
The automatic rate fallback feature ensures that the logical channel remains open, even if an individual link fails. IMXi-4 automatically neutralizes the failed link and the data is multiplexed at a lower rate over the remaining links. When failed links are recovered, IMXi-4
automatically returns to the original rate.
If links between the units are crossed, the traffic in the system is not affected, and IMXi-4 performs cross-link corrections.
IMXi-4 compensates for a differential delay of up to 200 msec between the network lines. The end-to-end delay of IMXi-4 is less than the maximum delay between the links.
System timing is derived from the internal clock or a receive clock (RCV) from one of the network links (1 to 4). The automatic receive option allows the system to choose the timing link automatically. If this link fails, the system chooses another RCV link clock.
Status, alarm, and diagnostic information is defined, configured, and monitored using any of the following management interfaces:
Inband and out-of-band (SNMP)
Local management via ASCII terminal
Remote management via Telnet using IMXi-4 inverse multiplexer ( mux )- 4 T1s or
4 E1s from RAD
RADview-EMS – RAD’s client-server, CORBA-based Element Management System.
Comprehensive diagnostics and statistics on all ports and network layers enable network control and fault localization. IMXi-4 provides
loopback tests, Ethernet frame counters, and IP packet statistics.
IMXi-4 inverse mux is a compact standalone unit. A rack mount adapter kit allows installation of one or two side-by-side units in a 19-inch rack (see Ordering).
IMXi-4 inverse multiplexer ( mux )- 4 T1s or 4 E1s from RAD - APPLICATIONS
Figure 1. WAN Access through SDH/Sonet Network
Most popular models are: IMXI-4/48/ETU/SL, IMXI-4/48/ETU/T1, IMXI-4/AC/ETU/E1/B,
IMXI-4/AC/ETU/SL, IMXI-4/AC/ETU/T1
IMXi-4 INVERSE MUX NETWORK INTERFACE
Ports
4 × SHDSL per ITU-T Rec. G.991.2
4 × E1 or 4 × T1 per G.703, G.823, or G.824
Line Codes
SHDSL: TC-PAM
E1: HDB3
T1: B8ZS
Line Impedance
SHDSL: 135Ω
E1: 120Ω balanced or 75Ω unbalanced
T1: 100Ω balanced
Maximum Payload Data Rate
SHDSL: n × 2.079 Mbps (n=1 to 4 links), up to 8.316 Mbps
E1 framed: n × 1.71 Mbps (n=1 to 4 links), up to 6.84 Mbps
E1 unframed: n × 1.84 Mbps (n=1 to 4 links), up to 7.36 Mbps
T1: n × 1.37 Mbps (n=1 to 4 links), up to 5.48 Mbps
Range (on 24 AWG pair) SHDSL link:
Up to 4 km (2.5 miles) at 2.312 Mbps per link
Up to 8 km (5.0 miles) at 0.2 Mbps per link E1/T1 link: per ITU G.703
SHDSL Differential Delay: Up to 200 msec
Handshake Protocol: G994.1
Connectors (per port) RJ-45
Note: When the optional unbalanced E1 interface is ordered, adapter cable CBL-RJ45/2BNC/E1 is supplied by RAD to convert one balanced RJ-45 connector to two unbalanced BNC connectors, (see Ordering).
LAN USER INTERFACE OF THE IMXi-4
Interface: 10/100BaseT Ethernet
Services: MAC bridge or IP router, user-selectable
Routing (optional, user-selectable): Static routing only, RIP ver.1, RIP ver.2, ARP and ping support
Connector:RJ-45
IMXi-4 SUPERVISORY PORT
Interface: RS-232, asynchronous
Baud Rate 0.3 to 115.2 kbps, user-selectable or automatic detection
Connector RJ-45
Note: Cable CBL-RJ45/D9/F/6FT that connects the IMXi-4 management port to a terminal is supplied by RAD, (see Ordering).
Figure 2. Connecting Customer Premises to WAN
Ordering information:
IMXi-4/~/*/&/< Managed Inverse Multiplexer
Specify power supply:
AC for 100 to 240 VAC
48 for –48 VDC
* Specify ETU for 10/100BaseT
interface
& Specify network link technology:
SL for SHDSL
E1 for E1
T1 for T1
< Specify E1 interface type:
B for balanced
U for unbalanced
SUPPLIED ACCESSORIES
CBL-RJ45/2BNC/E1 Adapter cable for converting one balanced RJ-45 connector to two unbalanced BNC connectors (supplied when unbalanced E1 interface is ordered)
CBL-RJ45/D9/F/6FT Adapter cable for connecting the RJ-45 connector to the serial communication port of a standard terminal or PC with a 9-pin D-type connector
OPTIONAL ACCESSORIES
RM-35/@
Hardware kit for mounting one
or two units in a 19-inch rack
@ Specify rack mount kit type:
P1 for mounting one unit
P2 for mounting two units
Most popular models:
IMXI-4/48/ETU/SL
IMXI-4/48/ETU/T1
IMXI-4/AC/ETU/E1/B
IMXI-4/AC/ETU/SL
IMXI-4/AC/ETU/T1
IMXi-4 data sheet (pdf)
