Product ManualManual

The 7708GT-4 is a VistaLINK®-capable Quad Gigabit Ethernet Fiber Transceiver for up to four independent 10/100/1000BaseT Ethernet channels over optical fiber. Monitoring of card status and parameters are provided locally at the card edge and remotely via VistaLINK®. A pair of 7708GT-4 transceivers permit full duplex communication of all four channels up to 1GB/s each over a pair of optical fibers.

The 7708GT-4 occupies one card slot and can be housed in the 1RU 7801FR frame which holds up to four single or two dual slot modules, the 3RU 7800FR frame which has a 15 slot capacity, the portable 3RU 350FR frame which has a 7 slot capacity, or a standalone enclosure which holds a single module.

  • Four completely independent and isolated Ethernet streams
  • Low latency
  • Auto negotiation for 10/100/1000 speeds on all ports
  • Comprehensive signal and card status monitoring via four digit card edge display or remotely through SNMP and VistaLINK®
  • VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 7800FR frame with a 7800FC VistaLINK® Frame Controller
  • Optical output wavelengths at 1310nm, 1550nm and up to sixteen CWDM wavelengths (ITU-T G.694.2 compliant)
  • DWDM wavelengths (ITU-T G.694.1 compliant) also available
  • Fully hot-swappable from front of frame
  • Optical SFP supportable from the rear
  • Status Indication
  • Frame status
  • 10/100/1000 Speed indication on copper ports
  • Full Duplex/Collision indication on copper ports
  • Link activity on copper ports
  • Received optical power level
7708GT-4 Application Configurations
Model  Wavelength  Optical Output PowerReceiver SensitivityReceiver Max InputNominal Received WavelengthMax DistanceFiber Type & Connector
**70km on 1590nm and 1610nm
7708GT-4+SFP10G-TR13-A1310nm+0.5dBm-8.5dBm-14dBm+1dBm1310nm10kmSMF, duplex LC/PC
7708GT-4+SFP10G-TR15S1550nm+4dBm-5dBm-15dBm+1dBm1550nm40kmSMF, duplex LC/PC
7708GT-4+SFP10G-TR15H1550nm+3dBm0dBm-24dBm-7dBm1550nm80kmSMF, duplex LC/PC
+2dBm-1dBm-14dBm-1dBm1270nm-1610nm40kmSMF, duplex LC/PC
+3dBm0dBm-24dBm-7dBm1270nm-1610nm70/80km**SMF, duplex LC/PC
+3dBm-1dBm-24dBm-7dBm1270nm-1610nm80kmSMF, duplex LC/PC

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Ethernet Input/Output7708GT-4
StandardIEEE 802.3 10base-T
802.3u 100base-TX
802.3ab 1000base TX
Connectors4 RJ45 ports
Cable Requirements
10Base-TUTP category 3, 4, or 5 cable up to 328ft/100m
100Base-TUTP category 5 cable up to 328ft/100m
1000Base-TUTP category 5 cable up to 164/50m
Latency2ns @ 1GB/s (per link with 1m patch cable)
Ethernet Input/Output7708GT-4-F
ConnectorOptical SFP Cage, LC-UPC connectors
Optical SFP1000 Base X
RJ45 SFP1000 Base TX
Voltage+12V DC
Power12 watts
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

NotesSelect from optical and SFP options below
7708GT-4Quad Gigabit Ethernet fiber transceiver, RJ45 ports for Ethernet connection
7708GT-4-FQuad Gigabit Ethernet fiber transceiver, SFP interface for Ethernet connection (SFP's not included)
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+1RU1RU rear plate for use with 7701FR Multiframe
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR 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
7801FR1RU Multiframe which holds 4 single slot modules
7701FR1RU Multiframe which holds 3 single slot modules
S7701FR7700 Series Standalone Enclosure
Trunk Optical options
SFP10G-TR131310nm laser, 10km max, SMF
SFP10G-TR15S1550nm laser, 40km max, SMF
SFP10G-TR15H1550nm laser, 80km max, SMF
CWDM & DWDM (Ordering Information)
SFP10G-TRCxxCWDM laser (1470-1610nm), 40km max, SMF
SFP10G-TRCxxHCWDM laser (1470-1610nm), 70km/80km max, SMF
SFP10G-TRDxxxHDWDM laser (ch.20-ch.59), 80km max, SMF
7708GT-4-F Ethernet SFP Options
SFPTR-13SFP GigE optical tranceiver, 1310nm, SMF, standard sensitivity
SFPTR-CxxSFP GigE optical transceiver, CWDM (1270-1610nm), SMF, standard sensitivity
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