ETU02-MUX-Plus 1U, 3 I/O Slot Data, Ethernet, Voice E1 Managed Multiplexer

1U, 3 I/O Slot Data, Ethernet, Voice E1 Managed Multiplexer

The ETU02-MUX/PLUS is a 1U 19(23)" 3 slot rack type E1 Time Division Multiplexer for Fractional E1 network access which provides an economic solution for central site or remote installations. There are 3 slots available for hot-swappable ETU02-MUX/PLUS-I/O cards. One slot is provided for MUX-E1 card, which provides either single E1 main link or main E1 link plus a drop and insert sub-E1 port. The MUX-E1 card may be linked to another ETU02-MUX/PLUS or ERM-MUX/PLUS Rack to provide a point-to-point variety of datacom, Ethernet & voice over E1 network services. The ETU02-MUX/PLUS optionally accommodates up to two separate power supplies, which may derive power from AC (110/220) or DC (-48V) power sources. When two power supplies are installed, the modules provide complete power redundancy and are hot swappable even during the E1 cards' transmission. The ETU02-MUX/PLUS provides BNC and RJ-45 for E1 Line interface connections, RJ-45 connections are used for all voice (FXO, FXS, E&M), for 10/100 Ethernet Bridge and G.703/64K Co-directional. Optional cable adapters are used to convert the DB-62F DCE ports of the I/O cards to 4xRS-232 or HP68F DCE ports of I/O card to 2x V.35, RS-530, RS-449, RS-422 and X.21 channels.

ETU02-MUX-Plus 1U, 3 I/O Slot Data, Ethernet, Voice E1 Managed Multiplexer schematic


  • 1U 19” 3-slot chassis
  • Provides 3 slots, removable interfaces: V35, X21, RS530, RS449, RS232, G.703 Co-directional, Ethernet Bridge, FXO, FXS and E&M
  • Optional drop and insert E1 port (Sub E1)
  • Setup and Control via RS-232 terminal
  • Multiple clock source selection (Internal or External: E1 recovery, DTE or DCE)
  • Optional SNMP management


Indications: Power, Signal loss, Sync loss,Alarm (AIS, MRAI, RAI), TD, RD, Error, Test
Standard: ITU-T G.703/G.704/G.706 & G.732, G823
Power: AC: 90 ~250V
Power Consumption: 20W
Dimensions: 235 x 438 x 45mm (D x W x H)
Weight: 2.9kg
Temperature: 0~50°C (Operating) ,-10~70°C (Storage)
Humidity: 10~90% non-condensing
MTBF: 57,000 hrs (25°C)

Ethernet bridgeEthernet bridge

  • 2 independent channels , Ethernet bridge interface
  • 10/100Base-TX bridge
  • Auto-Negotiation
  • Auto MDI/MDIX
  • Forward 1522 bytes (Max.) packets
  • Supports IEEE 802.1q Tag VLAN pass thru
  • Support flow control (Pause)
  • Standard - IEEE 802.3/802.3u
  • Connector - RJ-45 x 2, 10/100Base-TX, Auto-negotiation
  • Frames - Supports 64-1522 bytes packet length
  • WAN protocol - Synchronous HDLC
  • WAN rate - N*64Kbps, up to 2048Kbps

LAN Specifications:

Standard: Fully compliant with IEEE 802.3/802.3u
Connector: RJ-45x2
Speed: 10Base-T/100Base-TX, Full or half duplex
Frames: Supports 64 to 1522 byte packet lengths standard and extended length frames for VLAN tagging, etc.

WAN Specifications:

Protocol: Synchronous HDLC
Rates: N*64 or N*56Kbps, up to 2048Kbps

X.50 cardX.50 card


Interface types: RS232
Connector: DB62F with cable adapter
Line code: NRZ
Data rate: 2.4K ~ 19.2kpbs x 5Ch
Loopback type: Local/Remote loopback

G.703/64K co-directional card

G.703/64K co-directional card

  • 2-channels , Co-directional 64K interface
  • Interface type: ITU-T G.703/64K
  • Connector: RJ-45 x 2
  • Line code: Co-directional
  • Data rate: 64Kbps ± 100ppm x 2-channels
  • Line impedance: 120 ohm (balanced)
  • Frame mode: Unframed only


Interface types: G.703/64K, Co-directional
Connector: RJ45 x 2
Line code: ITU-T G.703/64K, Co-directional
Data rate: 64kpbs±100ppm x 2 channels
Line impedance: 120 ohms
Frame mode: Unframed only

RS-232 card

RS232 card for ETU02-Mux

  • 4-channels
  • Interface type: RS-232 (V.24)
  • Connector: HD62 female with appropriate cable adapter
  • Line code: NRZ
  • Data rate: Asynchronous mode <= 38.4Kbps (4-channels), Synchronous mode = 19.2/38.4/64/128Kbps


Interface types: RS232
Connector: HD62F with cable adapter
Line code: NRZ
Data rate: 3.84kbps x 4ch or 64/128kbps x 4ch


E&M for ETU02-MUX-Plus

  • BD/GD wires are for battery and ground detection
  • E&M card provides 4 independent channels
  • E&M interface provides 1 pair of E and 1 pair of M
  • Each E&M can support Type I, II, III, IV or V
  • Loop current range is normally 5-30mA, 70mA max
  • Timeslot 16 complies with ITU-T G.711
  • TX / RX attenuation, and 2 / 4 wire operation


Input level: 0 to -16dBr, in 0.5dB steps
Output level: 0 to -16dBr, in 0.5dB steps
Impedance: 600 ohms, option
Return loss: 2-wire 300-600Hz: >12dB; 2-wire 600-3400Hz: >15dB; 4-wire 300-3400Hz: >20dB
Group delay: 2-wire @ -10dBm: < 750μ second; 4-wire @ -10dBm: < 600μ second
Total distortion: According to ITU-T G223
Channel cross-talk: Not exceed -65dB, 1020Hz@0dBm
Out-of-band Signal attenuation: -25dBm@4.6~72KHz
Level not to exceed: -50dBm
Noise: <-65dBm
Interface connector: RJ-45*4

E1 and Sub E1 module

  • Single E1 or 1+1 E1 card (E1 and Sub-E1), provides unbalanced BNC or balanced RJ45 connector
  • Each E1 loop provides clock to be used as system clock source


Connectors: BNC for unbalanced ; RJ-45 for balanced
Framing Framed: Unframed / Framed CCS(PCM31) / CAS(PCM30)
CRC check: CRC4 on/off
Bit rate: 2.048Mbps±0 ppm
Line code: AMI / HDB3
Line impedance: 75 ohm(BNC) / 120 ohm(DB-15, RJ-45)
Relative receive level: 0 to -43dB
Transmitter driver reach: 1.5Km
Pulse amplitude: Nominal 2.37V ±10% for 75ohm, Nominal 3.00V ±10% for 120ohm
Zero amplitude: ±0.1V
Transmit frequency: Internal timing ±30 ppm
Tracking: Recovery timing ±50 ppm
External: timing±100 ppm
Jitter performance: According to ITU-T G.823
Compliance: ITU G.703, G.704, G.706, G.732

Nx64 card

Nx64 card for ETU02-MUX-Plus

  • 2-channels , High speed data interface
  • Interface type: V35/RS-530/X.21/RS-449
  • Connector: HD68 female with appropriate cable adapter
  • Line code: NRZ
  • Data rate: N*64kbps, where N=1 to 31 in CCS
    N=1 to 30 in CAS


Interface types: RS530, X.21, V.35, RS449, RS232
Connector: HD68F with cable adapter
Line code: NRZ
Data rate: Nx64kbps


  • FXS for ETU02-MUX-PlusProvides 4 independent channels
  • Connects to standard telephones


Connector: RJ45 x 4
Impedance: 600 ohms
Level Gain: On Tx side 0 dB, On Rx side -3.5dB
Ring current Output: 75±15V
Frequency: 25±3Hz
Feeding voltage: -48
Loop resistance: 1800 ohms
Connecting distance: up to 4km
Wire Gauge: 0.4mm
Feeding working current: 20mA


FXO for ETU02-MUX-Plus

  • Provides 4 independent channels
  • Connects directly to PSTN


Connector: RJ45 x 4
Impedance: 600 ohms
Level Gain: On Tx side 0 dB, On Rx side -3.5dB
Ring current impedance: > 7.5k ohms
Direct current resistance: < 300 ohms
Maximum direct current borne: > 70V

Live Demo of FRM220 Chassis

More Information

0 (Min. 0 Characters)
Company Name
0 (Min. 0 Characters)
Your Email
0 (Min. 16 Characters)