IP-Tube DL T1-ecan
IP•Tube DLT1 Ecan

T1 Ethernet Converter

• ROI Measured in Weeks
• Exploits Efficiency of IP/Ethernet
• Supports Legacy Switches/PBX
• On-board Echo Canceller

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9" (L) x 7.3” (W) x 1.50” (H)

T1 Ethernet Converter

• ROI Measured in Weeks
• Exploits Efficiency of IP/Ethernet
• Supports Legacy Switches/PBX
• On-board Echo Canceller

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9" (L) x 7.3” (W) x 1.50” (H)
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Rack Mount and Power Options
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Rack Mount and Power Supply Options

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Rear Panel: 12/30 VDC/AC Adapter (option)

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Rear Panel: 12/30 VDC Screw Term Adapter (option)

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Rear Panel: 12/30 VDC with Negative 48 VDC Screw Term Adapter (option)

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IP•Tube DLT1-Ecan

Convert T1 to Ethernet

IP•Tube DLT1 Ecan

T1 Ethernet Converter

2 Wire E&M Analog to Packet

- ROI Measured in Weeks -
- Exploits Efficiency of IP/Ethernet -
- Supports Legacy Switches/PBX -
- On-board Echo Canceller -

IP Tube VF 2-Wire E&M Product Image


9" (L) x 7.3” (W) x 1.50” (H)


T1 Voice Over IP

The IP•Tube DLT1-Ecan encapsulates full and fractional T1 circuits into IP packets. T1 Over IP connections provide for the interconnection of PBXs, Channel Banks and Telecom Switches via LANs, WANs, MANs, Satellite and Wireless Ethernet. 

The IP•Tube DLT1-Ecan ships with two T1 interfaces with either 1 or 2 active and two 10/100 BaseT Ethernet Interfaces. The inactive T1 Port can be activated via a software-based license key for a pay as you grow option.

Echo Canceller

The IP•Tube DLT1-Ecan has an integrated T1 Echo Canceller that cancels up to 64 milliseconds of Far End echo. The echo canceller meets ITU-T G.164, G.165 and ITU-T G.168 requirements for echo cancellation.

Transparent Interconnect

The IP•Tube DLT1-Ecan’s transparent operation maintains the proprietary signaling required to support PBX features such as call conferences, call forwarding, caller ID and SS7.

Signaling Support

PRI ISDN, SS7, ESF, D4, SLC-96, Proprietary out of band, and robbed bit signaling is supported. Echo cancellation is automatically disabled during FAX and Modem communications. Transparent support for Modem or Fax. Voice quality is not compromised. Legacy phone equipment investment is preserved.

DLT1 Diagram

IP• Tube DLT1-Ecan Standard Features

Assured Delivery Protocol

In order to assure that circuits are extended over connections with fault tolerance the IP•Tube DLE1-Ecan has as a standard capability an Assured Delivery Protocol that supports high performance full duplex real time data. The protocol has packet out of sequence detection and re-sequencing, duplicate skipping, and real time lost packet retransmission with configured delay.

Dual LAN Interfaces

All IP•Tube DLT1-Ecan models ship with dual 10/100BaseT Ethernet LAN ports. The dual Ethernet interfaces provide for:
• Management interface on LAN port 2 when LAN port 1 is connected to a VPN tunnel
• The LAN ports can be configured to support connections over 2 opposite ADSL links
• Alternator Option for load balanced SDSL interconnects
• Protector Option for Redundant Packet Path connections with Constant or Switch Over Criteria

VPN Network Management

Interconnecting the IP•Tube DLT1-Ecan through a Virtual Private Network with sufficient real time committed information rate ensures that the required quality of service is provisioned. The second Ethernet interface provides a management port. Each LAN interface features independent IP network configurations.

Network Management Diagram


Far End Echo Cancelling

IP•Tube DLE1-Ecan utilizes a Digital Signal Processor that detects and cancels echo at the far end so that the packet network delay has no impact on echo. The echo canceller samples the voice signal, estimates and removes the echo, leaving the original speech. The linear digital signal processor (DSP) models the echo and performs the main echo cancellation task. A non-linear DSP processor is then optimally employed to subtract out any residual echo or reflected noise components. Echo is one of the most important factors that affects voice quality. The presence of echo depends on both echo level and echo delay. The primary source of echo is the impedance mismatch at the hybrid that links a 2-wire analog loop to a 4-wire digital trunk. The hybrid is not completely efficient in carrying the electrical energy and a certain amount of the electrical energy, or voice signal, is reflected back and may be perceived as echo. Occasionally, acoustic feedback of certain phones also causes noticeable echoes. These sources of echo are able to be cancelled by the human brain as long as the time between our speech and the echoed speech is not greater than 32 milliseconds.

Engage's T1 Over IP products have a minimum delay configuration, 1 millisecond packetization and 4 packet buffering, which introduces a delay of 5 milliseconds. The amount of delay introduced by the packet network depends upon its switching times, packet processing, packet jitter, transmission, loading and quality of service configuration.

For example a network connection that utilize Gigabit Ethernet switches, which introduce delays in the microseconds, does not require echo cancellation. Wide Area Networks that traverse an intranet or Internet backbone have varying degrees of delay which can easily exceed 28 milliseconds. Total round trip delays in excess of 32 millisecond makes echo perceptible.

The IPTube’s Echo Cancellation provides the elasticity to support clear connections across networks with significant delay and packet jitter.

T1 Private Line Services over IP

Multi-Site Enterprises, Education Districts, Universities, National, State and Local Government, and Municipalities, incur significant recurring monthly costs for rigid-bandwidth leased lines used only for the interconnection of Phone Systems.

The IP•Tube DLT1-Ecan provides organizations with the ability to interconnect their existing phone systems over flexible bandwidth lines that are used to carry data, voice, and video. The Voice Only Leased Line Toll charges assessed by long distance and local carriers are eliminated or dramatically reduced by transporting voice traffic across LANs and WANs.


The most compelling option for the interconnection of T1 based systems is when it can be accomplished over a Local Area Network. The deployment of Fiber based LANS such as FDDI and Gigabit Ethernet, provides organizations with high performance and high quality bandwidth that is especially well suited for the interconnection of PBXs and Telecom Switches.


Wide Area Networks that have sufficient bandwidth and Quality of Service provisioning result very significant cost savings especially for Multinational Corporations. The IP•Tube DLT1-Ecan-C with loss less data compression, detects idle and redundant data within each voice circuit resulting in a 56 to 1 bandwidth savings. WAN bandwidth is not consumed by silence or redundant samples.

Broadband Service Providers

Companies, that are able to provide IP Ethernet access networks generate new revenue by offering traditional T1 leased line and private line services, such as: 

Cable Operators

Cable operators connect traditional T1 leased line and private line services over their hybrid fiber coax (HFC) cable networks. HFC Cable network latency typically requires echo cancellation. 

Metropolitan Area Networks

Metropolitan carriers with IP or Ethernet access networks deliver traditional leased line and private line services.


Utilities generate new revenue by offering traditional T1 leased line and private line services over their fiber or power line networks.

Incumbent Carriers

Telcos reduce costs by delivering profitable leased and private line services over their flexible Ethernet infrastructures.

CLEC PBX Back Haul

The IPTube DLT1-Ecan provides CLECs with a way to back haul T1 DS0s from a customer’s phone systems over their Internet connection. The back hauled DS0s are connected to the CLECs phone switch for connection to the Public Switched Telephone Networks. Local Exchange Carriers are able to offer an economical alternative to the local Phone Company.

Wireless Ethernet

Connecting phone systems across a wireless Ethernet connection has a return on investment that is measured in weeks. Eliminating the wired connection for the T1 based communication equipment is made possible with the IPTube’s T1 Over Ethernet capability.
Echo Cancellation enables Wireless connections to support T1 Over IP real time connections in a point to multipoint configuration.

Wireless DLT1 Diagram

Product Options

Lossless Data Compression OPTION-C

The IP•Tube DLT1-Ecan-C continuously detects idle and redundant data within each T1 Voice circuit resulting in as much as a 56 to 1 bandwidth savings.

TDM over IP WAN bandwidth is not consumed by silent or redundant circuits.

Note: Compression only supported with IP•Tube DLT1-Ecan-C models.

Compression Diagram

DS0 Timeslot Multiplexor OPTION -MUX

The IP•Tube DLT1-ECAN-MUX maps DSOs from a central site to as many as 24 remote locations via an IP/Ethernet connection. Get maximum use of expensive DS1 interfaces on PBX, Channel equipment and datacom gear. Also provides Virtual DACS Over IP capability. Mesh DS0s one-to-many or many-to-many.

MUX Option Diagram

T1 Switch OPTION - SWT

The T1 switch option enables the T1 Port 1 interface to be manually switched between a T1 circuit connected to T1 Port 2 or to T1 Over IP packets connected with the remote IPTube.

• Remote Control of T1 Connection to Telco or T1overIP
• Installation performed by a single Technician
• Quick reversion to Telco during debug of T1overIP 
T1 Switch Option Diagram

T1 Link Protector OPTION - LPT

The T1 Link Protector provides an automatic back up for T1 circuits with T1 Over IP connecting via Wireless Ethernet, Gigabit Ethernet, IP Satellite Services, xDSL,....

 • Automatic Protection Switch for T1 Circuit
 • Deliver on Stringent Service Level Agreements
 • Back Up for Mission Critical Connectivity
 • Disaster Recovery for Public Safety Networks
T1 Link Protector Option Diagram

Alternator Load Balancing OPTION - ALT

The IP•Tube DLT1-ECAN-ALT  Alternator option alternatively sends the IP packetized T1 frames on LAN 1 and LAN 2. The Alternator option enables fractional and full T1 circuits to be split over two IP WAN connections such as xDSL. The Lossless Data Compression option can be combined with the Alternator option to minimize the bandwidth required from the alternative paths.

Full T1 Connection Across Two ADSL Lines

The IP•Tube DLT1’s two Ethernet interfaces are able utilize two ADSL Ethernet Modems, that have opposite high speed direction, to transport a T1’s symmetrical bandwidth.

Full T1 Connection Across Two ADSL Diagram

Rate Limiter OPTION -RLM

The IP•Tube DLT1-ECAN-RLM Rate Limiter option limits the WAN bandwidth utilized by the LAN1 to LAN2 bridge. Rate Limiting the traffic enables the reservation of the WAN bandwidth for time the sensitive T1 Over IP real time connections. Great for Wireless WAN T1 applications. Rate Governing is only applied in the direction to the WAN to minimize latency. The data rate governor utilizes Time Division Multiplexing based clocking to provide for Nx64, NxE1 and NxFT3 bandwidth regulation that is configured from 64 kilobits up to 45Mbits.

Rate Limiter Option Diagram

Protector OPTION -PRO

The protector option utilizes the second LAN interface as a redundant path for the interconnection of the IP encapsulated T1 Circuit. The extension of the T1 circuit has a fault tolerant link that is configured to always on, or with switch over criteria.

Protector OPTION -EnPRO

The Enhanced version has configuration parameters that enable a secondary packet path with high relative delay to primary path be synchronized. The packet sequence delay synchronization ensures concurrent redundancy with a high degree of error tolerance. Error free operation is accomplished when a primary or secondary Packet is not received and a redundant duplicate packet is available. The IPTube also supports the transmission of multiple duplicate packets to support Mission Critical Circuit extension with redundancy that is only limited by the bandwidth provisioned.

Enhanced Version Diagram

Pay-As-You-Grow Field Upgrades

The IP•Tube DLT1 Ecan are designed for Pay-As-You-Go growth from 1 T1 to 2 T1s. Customers can elect to economize initial installations, buy purchasing a single active T1 port and enable the additional T1 Port via a software-based license key. NOTE: Each T1 Port has its own DSP Echo Cancellation hardware that is installed during assembly so it is NOT possible to field upgrade.

Field Upgrade benefits are extended to our Industry-Best Loss less Data Compression. Just as T1 ports are field upgrade able, so is Loss less Data Compression. At any time, each T1 port on the IP•Tube DLT1-Ecan can be upgraded to Loss less Data Compression with a simple software-based license key installation. If you determine that your IP•Tube DLT1 Ecan is best deployed with Loss less Data Compression, your still in business with the per port field upgrade!

Rack Mount Kit

The IP•Tube family is ready for central office or data center environments with 19" and 23" Rack Mount Kits.


LAN Network Interface

• Two 10/100BaseT Full/Half Ethernet
• Auto Negotiation or Configurable Speed and Duplex

LAN Network Protocols Supported

• Assured Delivery Protocol 
• DNS Address Discovery
• Dynamic DNS

Echo Canceller

• Voiceband Echo Cancelling according to ITU G.165 and G.168
• u- and A-Law coding according to ITU G.711
• 24 channels with end echo path delay of less than 63.75 ms 

T1/Fractional T1 Specification

• One or two Port Models
• Connects directly to T1 or DS1
• Framing - ESF or D4
• Coding - B8ZS or AMI
• Supports DS0 assignments from 1 to 24
• Not Contiguous Configuration x-y,z Supported
• Signaling: Robbed Bit; PRI; Proprietary

T1 Over IP Protocol

• TDM Over IP
• Circuit Extension Services Over IP - CESOIP
• Frames Per Packet Configurable 8 to 56
• Low Latency Mode: 1 millisecond 8 T1 frames
• Max Payload Mode: 7 millisecond 56 T1 frames
• Comprehensive Clocking: Internal, Network, Adaptive 

Lossless Data Compression Option

• Detects idle and redundant data within each DS0
• Configurable Silence Detection Range
• Interconnect bandwidth is not consumed by silent or redundant data
• Compression settings from 8 to 1 to 56 to 1

TFTP Online Upgrade Capable (FLASH ROMs)

• IPTube is fully operational during upgrade

Quality of Service Support

• IP Type of Service (TOS) CLI configurable 
• IANA Registered UDP Port 3175
• 802.1p/q mac level prioritization 


• CE 
• Safety -IEC60950
• EMC - CFR 47 Part 15 Sub Part B:2002,
• EN55022:1994+A1&A2, EN55024, 
  ICES-003  1997, CISPR 22 Level A
• Telecom Part68


• Secure Socket Shell - SSH
• Telnet support with Edit and Paste Template Files
• Console Port for Out of Band Management
• SNMP support (MIB I, MIB II) with configurable traps
• Remote config., monitoring, & reset
• Telco Diagnostics: Local Loop, Remote Loop

Rear Panel/Power

• 12-24 VAC/VDC, 1.0A. International Adapters Available
• Optional -48V 0.25 Amp
• Dimensions: 9" (L) x 7.3” (W) x 1.50” (H)

Ordering Information

Front View of Product
Back View of Product
BlackGate RS232 Rear
BlackGate RS232 Rear
BlackGate RS232 Rear

Part No.




IP•Tube DLT1-Ecan, *Note: x = Specified # of T1 Ports (1 to 2)

IP•Tube DLT1-Ecan with xT1 Compression, *Note: x = Specified # of T1 Ports (1 to 2)

Base Options

Base Options


ROHS compliant materials and processes - Restriction of Hazardous Substances no Pb


Rate Limiter Option - Reserve T1 Over IP Bandwidth


T1 Multiplexer and DACS - Groom 2 to 24 remote locations Over IP


Protector Option, Fault Tolerant Network Interconnect. The protector option utilizes the second LAN interface as a redundant path for the interconnection of the IP encapsulated data. The extension of the IP-Tube has a fault tolerant link that is configured to always on, or with switch over criteria.  Learn more.


T1 Switch Option - Provides for Manual Switching of T1 or T1 Over IP


Link Protector Option - Automatic T1 Circuit Backup with T1 Over IP


Alternator Load Balancing - Enable Alternator Load Balancing

Power Supply Options

Power Supply Options


90-220 VAC Universal International/Domestic Adapter


DUAL REDUNDANT, 90-220 VAC Adapter


Internal Power Module, -48 VDC Screw Terminals


DUAL REDUNDANT, -48 VDC Screw Terminals


WIREDC Option, +24 VDC Screw Terminals



Rack Mount Options

Rack Mount Options


Rack Mount Kit - for single 7" products (Fits both 19" and 23" racks)


2 unit 19" x 1RU Rack Mount Kit for 7" products




Right Angle Wall Mount Bracket Kit

So What's Next?


Engage Communication
9565 Soquel Drive. Aptos, CA 95003
This email address is being protected from spambots. You need JavaScript enabled to view it.
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Telephone: 1-831-688-1021
Toll Free : 1-877-ENGAGE4
Designed, Fabricated, and Assembled
in America 
Supported Worldwide