E1/G.703 plus Ethernet over fibre

TN-S6120 E1 Modem



  • 4 x RJ-48 copper E1/T1 interfaces
  • 1 x fibre interface (fixed or SFP)
  • 1 x RJ-45 10/100Mbps Ethernet port
  • Remote management


The ION S6120 is a managed stand-alone DS1 – T1/E1/J1 mux that provides a solution for those users that need to extend multiple DS1 – T1/E1/J1 connections, along with a 10/100 Ethernet connection, all over fibre. The S6120 includes (4) RJ-48 ports, (1) 10/100 Ethernet port, and (1) fibre port. The device is available in versions that support fixed fibre connectors as well as SFP fibre modules offering support for a variety of fibre types, distances, and wavelengths to provide maximum flexibility across a variety of network topologies. CWDM SFPs can also be utilized to further increase the bandwidth capacity of the fiber infrastructure.

Typical Application

Connecting PABXs over fibre

The S6120 converter must be used in pairs. Management of the stand-alone converter is supported, in-band, over the fiber, when the remote S6120 is linked to a C6120 card installed in a managed ION chassis.

Data Sheet


Item Description

ANSI T1.102
T1.403 and T1.408
ITU I.431
ETSI 300-166; 300-233
TBR 12/13
AT&T Pub 62411
IEEE 802.3

Data Rate

Copper ports (RJ-48): T1(J1) = 1.544Mb/s,
E1 = 2.048Mb/s
Ethernet port (RJ-45): 10/100Mbps
SFP port(s): 100Base-X/OC-3


Numerous switch settings for line coding, line
build out, loopback and AIS

Status LEDs

Power, Port Status, Loopback and AIS


Width: 3.7” [94 mm]
Depth: 6.5” [165 mm]
Height: 1.8” [46 mm]

Power Consumption

6 Watts (max) for dual fiber model
5.5 Watts (max) for single fiber model

Power Input

AC: 12 VDC via barrel connector using 100-240VAC,
UL listed power supply


Operating: -10°C to 65°C
Storage: -40°C to 85°C
Humidity: 5% to 95%


EN55022 Class A, EN55024, CE mark



Ordering Information

Order Code Description
TN-S6120-1013 1300nm multimode (SC) [2 km/1.2 mi.] 11.0 dB to (4) RJ-48 [1.5 km/0.9 mi.] + 10/100Base-TX (RJ-45) [100m]
TN-S6120-1014 1310nm single mode (SC) [20 km/12.4 mi.] 16.0 dB to (4) RJ-48 [1.5 km/0.9 mi.] + 10/100Base-TX (RJ-45) [100m]
TN-S6120-1040 1 SFP port to (4) RJ-48 [1.5 km/0.9 mi.] + 10/100Base-TX (RJ-45) [100m] (SFP port uses standard 100Base-x/oc-3 SFP)

More Information