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|   Ethernet over T1 Converter   |

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The Ethernet over T1 Converter allows the user to send Ethernet data, between two points, over T1 links. T1 Interface is 100 Ohms. Ethernet Interface options may be ordered as 10/100 Base-T Electrical Ethernet or 100Base-FX Optical Ethernet over 850nm/1310nm/1550nm single mode optical fiber.

The equipment be always installed and used in pairs, with one terminal being installed at either end of the T1 link.

The VCL-Ethernet over T1 Converter is an Ethernet extension device utilizing TDM telecom infrastructure (the telecom network of T1, or of PDH, Sonet and T1/DS3/SDH microwave etc. carrying T1). It converts the Ethernet data into T1 frame format for transmission over the existing TDM (T1) link and then re-converts the T1 back into Ethernet data the far-end terminal, to BRIDGE two Ethernet LANs over the existing T1-based telecom network. The device can effectively utilize the existing TDM network to transport Ethernet data with low investment.


The equipment may be used for the following purposes:

  1. Bridging Ethernet LANs over existing TDM (T1) telecom network.
  2. Extending Ethernet networks utilizing TDM (T1) landline based telecom infrastructure.
  3. Using telecom network of T1/PDH/SDH microwave etc. carrying T1 to transport Ethernet Data.

In all cases the equipment must be always installed and used in pairs, with one terminal being installed at either end of the network.

Technical Features

  • The maximum transmission rate of Ethernet data over T1 links is 1.544 Mbit/s
  • T1 supports two working modes of transmission. Un-Framed/Transparent and Framed T1 format
  • 10/100 IEEE 802.3 Ethernet MAC (MII and RMII) half/full duplex with automatic flow control
  • Supports X.86, LAPS and HDLC transmission protocols
  • Committed information rate controller provides fractional allocations in 512 Kbps increments
  • Available with MAC address list filtration, learning, and updating functions
  • A large external SDRAM buffering for handling data bursts
  • Equipment supports two working modes, internal clock and Network clock (Loop-Timed clock).

T1 Interface Specifications

Line Rate T1 (1.544 Mbps 50 bps)
Available Time-Slots 1-24
Framing Structure As per ITU (CCITT) G.704
Framing Options D4, ESF (Selectable)
Line Coding AMI, B8ZS (Selectable)
Electrical  ITU-T G.703
Jitter ITU-T G.823, ITU-T 1.431
Impedance 100 Ohms
Connector  RJ-45 (F)

Management Control

  • Serial Management Port (RS232) - COM Port
  • 10/100 BaseT for Remote Access / Telnet.

Clock Selection Options

  • Internal clock and Network clock (Loop-Timed clock).

Power Supply (Optional)

AC Mains Input 110
DC Mains Input -48V DC - option # 2

Power Consumption


Services Conditions

Ambient Temperature  -200C ~ +650C
Relative Humidity <= 90% (at 350C)

Mechanical Specification

Height 44mm.
Depth 260mm.
Width 480mm.
Weight 4kgs.

Ordering Information

VCL-Electrical Ethernet over T1

S. No. Part # Product Description
1 VCL-Ethernet over T1 AC-1 AC Input with Electrical Ethernet
2 VCL-Ethernet over T1 DC-2 DC Input with Electrical Ethernet

Others Links:

  STM SDH Multiplexers
  E1 VoIP-GSM Gateways
  VoIP SS7 and C7 Solution
  Echo Cancellers and VQE Solutions
  GSM Gateways / GSM Channel Banks
  E1 and T1 over Ethernet (TDM over IP)
  Digital Access Cross Connect Switch (DACS)
  E1, T1, E3, DS3, Ethernet Converter (IP over TDM)

Technical specifications are subject to change without notice.
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