UFM-780 Series

Gigabit Optical Multiplexer

UFM-780 Series Gigabit optical multiplexer product series, provides a flexible and cost effective solution to transport T1/E1, Nx64kbps and Gigabit Ethernet Services over Gigabit optical fiber link.

With modular system design, UFM-780 Series can accomodate different plugin cards for E1, T1, V.35 Nx64kbps and Gigabit Ethernet to fit user’s current and future service requirement.

UFM-780 Series can aggregate up to 8 Gigabit Ethernet channels and share the total Gbps transportation bandwidth. It optimizes the bandwidth utilization over the optical fiber. The Gigabit optical uplink has 1+1 redundancy mechanism to increase system reliability.

Capacity Options

  • 4 tributary slots for T1/E1, V.35, and Ethernet Up to 16 T1/E1,4 x V.35 (Nx64kbps), Combo Ethernet (10/100/1000Base-T or 1000Base-X) or a combination of those.

Ethernet Interface

  • Two Combo Ethernet interfaces per card with VLAN features.
  • Variety SFP modules for GbE optical interface.
  • Ports are fully isolated.
  • Sophiscated QoS and limiting schemes.

Order Wire

  • Two-wire analog transmission (optional)

High Reliability

  • Transmission and power 1+1 redundancy

High Flexibility

  • Hot swappable design

High Maintainability

  • LCM & keypad local operation. Craft Interface, Telnet and GUI/SNMP network management functions

Compact Design

  • UFM-780C 1.7U / UFM-780A/J 1.0U in height / UFM-780R 5U

Standard Compatibility

  • Comply with ITU-T G.703, G.823, G.824, IEEE802.3u 10 Base-T & 802.3u 100 Base-Tx about Ethernet Interface, CE, RoHs

Low bit error rate(BER<10-10) Performance monitoring(PM) and history PM data storage

Optical Interface

  • Line Rate: 1.25 Gbps
  • Connector: SFP Module, LC/PC type
  • Optical Link 1+1 redundancy protection mechanism
  • Automatic Laser Shutdown (ALS) protection

E1 Signal Interface

  • Bit Rate: 2.048Mbps±50ppm
  • Line Code: HDB3/AMI
  • Pulse Shape: Conform to ITU-T G.703 Impedance: 120Ω balanced or 75Ω unbalanced
  • Jitter: Conform to ITU-T G.823
  • Connector: RJ-48C/DB-25 for 120Ω balanced BNC for 75Ω unbalanced.

T1 Interface

  • Bit Rate: 1.544Mbps±50ppm
  • Line Code: B8ZS/AMI
  • Impedance: 100Ω balanced
  • Jitter: Conform to ITU-T G.824
  • Connector: RJ-48C

Working temperature 0°C~65°C

AC/DC dual power

Hardware Key Features

  • Modularize and compact design
  • High Capacity: Combination of up to 8 E1, 2 GE Combo Ports, and 4 V.35
  • High Bandwidth: Total 1.2Gbps Line rate
  • High Reliability: 1+1 Line APS protection
  • Flexible optical module (SFP)
  • Multi-Services: E1, 10/100/1000BaseT, 1000BaseX, V.35 Different connector types of E1 for easy operation: BNC (75ohm), RJ-48C(120ohm), Alarm I/O
  • Dual Powered (AC+DC), Power redundancy protection
  • Multiple ways for operation & management: CIT, GUI, LCD
  • Hot swappable design
  • Surge Protection is compliant with IEC 61000-4-5 class3 or FCC part 68

Ethernet Interface

  • Two combo Ethernet interfaces, two RJ-45 connectors for 10/100/1000Base-T, two 1000Base-X SFP slot.
  • Support auto-MDIX function
  • Frame size
    • UFM-780A: up to 1632 bytes
    • UFM-780C: up to 2048 bytes
    • UFM-780J: up to 9000 bytes
    • UFM-780R: up to 2048 bytes

Bridge functions:

  • Support MAC address filtering and Embedded 2K entries of address table per port
  • Support IEEE 802.1Q VLAN, Q in Q, 802.1P Qos, DSCP, 4 priority queues per port, Rate limiting
  • End-to-End Fully isolated Ethernet channel without dependent on MAC learning.
  • Large burst packet buffer (UFM-780C)

V.35 Interface

  • Bit Rate: N x 64 Kpbs, N=up to 120
  • Connector: M34 Female

Power Supply

  • DC: -36~72V
  • AC: 90~260V, 47~63Hz Modularized power unit (UFM-780C)


  • Rack mount on a standard 19"/23" rack compliant with ETS 300119


  • UFM-780A: 436mm x 44.5mm x 320mm (WxHxD)
  • UFM-780C: 436mm x 76mm x 320mm (WxHxD)
  • UFM-780J: 436mm x 44.5mm x 320mm (WxHxD)
  • UFM-780R: 436mm x 220mm x 320mm (WxHxD)


  • Operation Temperature: 0 to 65°C
  • Relative Humidity: 5 to 90%, non-condensing


  • 79,410 hours minimum
  • About 5 years (UFM-780R)


  • FCC ClassA part 15B
  • EN55082-1, EN55022
  • CE, RoHs

Available Low Speed Units

Tributary Unit Tributary Interface Connector Type
ET1RJ(S)* E1/T1 (Chanel) RJ-48C
V35M2 V.35 (Chanel) M34
E1UB E1 (Chanel) BNC
ET1URJ(S)* E1/T1 (Chanel) RJ-48C
ET1UDB(S)* E1/T1 (Chanel) DB25
GETH 10/100/1000BaseT
1000Basex (Chanel)
* S-model is optional:ET1RJS, ET1URJS and ET1UDBS can comply with IEC 61000-4-5:2005 ED.2.0

Operation and Control

  • Multi-ways to access the equipment
    • LCM
    • Console
    • Telnet
    • SNMP (NMS)

E1 Tributary interface

  • Bit Rate: 2.048Mbps ±50ppm
  • Line Code: HDB3/AMI Pulse
  • Shape: Conform to ITU-T G.703
  • Impedance: 120Ω balanced (RJ48C) or 75Ω Unbalanced (BNC)
  • Jitter: Conform to ITU-T G.823
  • Each input/output port is equipped with a pin for grounding.

T1 Tributary interface

  • Bit Rate: 1.544 Mbps ±50ppm
  • Line Code: B8ZS/AMI
  • Jitter : Conforms to ITU-T G.824
  • Impedance : 100Ω balanced
  • Connector: RJ-48C or wire-wrapping

V.35 Tributary interface

  • Bit Rate: Nx64 kbps, N=1~32
  • Compliance standard: ITU-T V.35
  • No. of V.35 interface per module:
    • One on QE1QG unit
    • Four on V35x4 Unit
  • Connector type:
    • One M34 connector on QE1QG Unit
    • Cable adaptors to four M34 connectors for V.35x4 Unit

Ethernet Tributary Interface

  • Connector types: RJ-45 or Optical LC connectors
  • Transmission distance: up to 100m over Cat-5e/Cat-6 UTP cable
  • Frame size: up to1632 bytes
  • Per port MAC address filtering
  • Embedded 8K MAC address entries with automatic learning and aging
  • Port-isolated, 802.1q VLAN, Q-in-Q
  • MAC and VLAN table display for each Ethernet channel
  • 802.3ad LACP Link Aggregation
  • Link down setting per Ethernet channel when aggregation interface or remote counterpart Ethernet link down.
  • Quality of Service (QoS) with four traffic classes.
  • QoS determined by Port, IEEE802.1p, IPv4 Type of Service (TOS) & Differentiated Services (DSCP), and IPv6 Traffic Class.
  • Fixed priority or weighted fair queuing scheme.
  • Ingress/Egress rate limiting for each Ethernet channel.
    • Rate limit: 70 kbps~64Mbps (1kbps per step), 94Mbps, 140Mbps, 280Mbps


  • Provides a flexible and cost effective solution
  • With modular system design (T1/E1/LAN/V.35)
  • Optimize the bandwidth utilization over the optical fiber


Gigabit Optical Multiplexer
UFM-780 Series Gigabit optical multiplexer product series, provides a flexible and cost effective solution to transport ...

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