The TB-UFM-680 STM-1 optical multiplexer equipment provides a flexible and cost effective solution to transport T1/E1, Nx64kbps and Ethernet Services over optical fiber. With modular system design, TB-UFM-680 can accommodate different plugin cards for E1, T1 and V.35 Nx64kbps to fit user’s current and future service requirement.TB-UFM-680 embeds four Ethernet channels on board to share up to 100Mbps bandwidth for data transportation. The total capacity of four 10/100 Mbps electrical Ethernet ports and up to 16 T1/E1 interfaces optimize the bandwidth utilization over the optical fiber. The optical link has 1+1 redundancy mechanism with APS (Auto Protection Switch) function to increase system reliability.

Capacity Options 4/8/12/16 T1/E1, 4 x V.35 (Nx64kbps), or a combination Ethernet Interface
Four 10/100Base-Tx Ethernet ports with VLAN features
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 Only 1.0U in height
Standard Compatibility 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: 155Mbps ±20ppm
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
Line Code: B8ZS/AMI
Jitter: Conform to ITU-T G.824
Connector: RJ-48C or wire-wrapping
Working temperature 0°C~65°C
AC/DC dual power


Ethernet Interface Four RJ-45 ports for four 10/100Base-Tx, (comply with IEEE802.3u 10 Base-T and 802.3u 100 Base-Tx)
Support auto-MDIX function
Frame size is up to 1536 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
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
Installation Rack mount on a standard 19″/23″ rack compliant with ETS 300119


Standalone: 436mm x 44.5mm x 280mm (WxHxD)


Operation Temperature 0 to 65°C
Relative Humidity 5 to 90%, non-condensing
MTBF 47,000 hours minimum
EMI/EMC FCC ClassA part 15B EN55082-1, EN55022 CE, RoHs

Capacity Options

4/8/12/16 T1/E1, 4 x V.35 (Nx64kbps), or a combination Ethernet Interface
Four 10/100Base-Tx Ethernet ports with VLAN
Optical Interface
Line Rate 155Mbps ±20ppm
Connector SFP Module, LC/PC type
Optical Link <1+1 redundancy protection mechanism
Available Low Speed Units
Tributary Unit Tributary Interface Connector Type
E1UBNC E1 (Chanel) BNC
ET1URJ(S)* E1/T1 (Chanel) RJ-48C
ET1UDB(S)* E1/T1 (Chanel) DB-25
V35M V.35 (Chanel) M34
* S-model is optional:ET1URJS and ET1UDBS can comply with IEC 61000-4-5:2005 ED.2.0