Product ManualManual

The 7708GT series Gigabit Ethernet Fiber Transceivers provide an economical method of transmitting 10/100/1000Base-T Ethernet channel over optical fiber. The transceiver is IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX and IEEE 802.3ab 1000BASE-TX compliant, mediates between a 10/100/1000BASE-TX segment. A pair of 7708GT transceivers permits full duplex communication over a single optical fiber or dual fiber. There is a built in two port gigabit Ethernet switch that supports a total bandwidth of 1000Mb/s. Diagnostic LEDs provide indication of power, linkage and data reception. The 7708GT series modules support jumbo frames and spanning tree protocol.

Two versions of the 7708GT allow the user to choose the optimal price / performance / features to suit a particular application. The "-F2" version is designed to receive and transmit over two different fibers and has the lowest insertion loss. This version can operate with Multi-mode or Single-mode fiber. The standard version is designed to receive and transmit on two different wavelengths (1310nm and 1550nm) over a single fiber and can operate with Single mode fiber only.


  • Auto negotiation for 10/100/1000 speeds, half/full duplex modes
  • Link status monitoring indicators
  • Optional VistaLINK® enabled for remote monitoring and control
  • Optical output available in 1310nm, 1550nm and up to sixteen CWDM wavelengths in the 1270nm to 1610nm range
  • DWDM (ITU-T G.694.1) wavelengths available
  • Supports multi-mode or single-mode fiber
  • Fully hot-swappable from front of frame with no fiber or Ethernet channel disconnect required
  • SC/PC or FC/PC connector options
  • Jumbo frame support
  • Spanning tree protocol support

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Ethernet Input/Output
StandardIEEE 802.3 (10 BaseT), IEEE 802.3u
(100 BaseTX), IEE 802.3ab
Number of Ports2
Cable Requirements
10 BaseTUTP category 3,4 or 5 cable up to 328ft/100m (2 pairs)
100 BaseTXUTP category 5 cable up to 328ft/100m (2 pairs)
1000 BaseTXUTP category 5 cable up to 164ft/50m (4 pairs)
Optical Input/Output
Single Fiber version1 female SC/PC or FC/PC
Dual Fiber (F2) version2 female SC/PC or FC/PC
Input Wavelengths1270nm-1610nm
Maximum Input Power
-H version-8dBm
Input Optical Sensitivity
WDM (-W)-21dBm
High Sensitivity (-H)-28dBm
Output Wavelengths
Standard1310nm, 1550nm (nominal)
CWDM1270nm to 1610nm (ITU-T G.694.2 compliant)
DWDMC-Band (ITU-T G.694.1 compliant)
Output Power
1310nm FP-7dBm ±1dBm
1310nm (-W)-1dBm ±1dBm
1550nm, CDWM (DFB)0dBm ±1dBm
DWDM (DFB)+7dBm ± 1dBm
Power8 Watts (Non DWDM) or 10 Watts (DWDM)
Number of Slots1
Laser SafetyClass 1 laser product
Complies with 24 CFR 1040.10 and 1040.11
IEC 60825-1
EMI/RFIComplies with FCC Part 15, Class A
EU EMC Directive

Ordering Information

Gigabit Ethernet Fiber Transceiver
7708GT13M-WSingle fiber, WDM, 1310nm DFB Tx, Rx on 1550nm
7708GT15-WSingle fiber, WDM, 1550nm DFB Tx, Rx on 1310nm
7708GT13-F2Dual fiber, 1310nm FP Tx & Rx
CWDM (Ordering Information)
7708GTxx-F2Dual fiber, CWDM Tx
7708GTxx-F2-HDual fiber, CWDM Tx, High Sensitivity Rx
DWDM (Ordering Information)
7708GTDxxx-F2Dual fiber, DWDM Tx (Contact Factory for Wavelength Availability)
7708GTDxxx-F2-HDual fiber, DWDM Tx, High Sensitivity Rx (Contact Factory for Wavelength Availability)
Ordering Options
NotesRear plate and fiber connector must be specified at time of order - eg: [model]+SC+3RU
Connector Suffix
Rear Plate Suffix
+1RU1RU rear plate for use with 7701FR Multiframe
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C or 7800FR Multiframes
350FRPortable Multiframe which holds 7 single slot modules
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7701FR1RU Multiframe which holds 3 single slot modules
S7701FR7700 Series Standalone Enclosure
Patch Cable
CB-FP1M-SCPCSingle mode fiber cable, 1m, SC/PC male termination
CB-FP1M-STPCSingle mode fiber cable, 1m, ST/PC male termination
CB-FP5M-SCPCSingle mode fiber cable, 5m, SC/PC male termination
CB-FP5M-STPCSingle mode fiber cable, 5m, ST/PC male termination
CB-FP10M-SCPCSingle mode fiber cable, 10m, SC/PC male termination
CB-FP10M-STPCSingle mode fiber cable, 10m, ST/PC male termination