The IP•Tube DLE1 ships with two E1 interfaces with either 1 or 2 active and two 10/100 BaseT Ethernet Interfaces. The E1 interfaces have configurations that for provide independent protocol, compression, packet sizing, buffering, clocking, framing, coding and channel settings. The inactive E1 Port can be activated via a software-based license key for a pay as you grow option.

Transparent Interconnect
The IP•Tube DLE1's transparent operation maintains the proprietary signaling required to support PBX features such as call conferences, call forwarding, caller ID and SS7. Legacy phone equipment investment is preserved.

Signaling Support
PRI ISDN, SS7, and Proprietary out of band are supported. Transparent support for Data, Modem or Fax. Voice quality is not compromised.

• Packet out of sequence detection and re-sequencing
• Duplicate skipping,
• Lost packet retransmission with configured delay. 

Dual LAN Interfaces
All IP•Tube DLE1 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

Full E1 Connection Across Two ADSL Lines
The IP•Tube DLE1’s two Ethernet interfaces are able utilize two ADSL Ethernet Modems, that have opposite high speed direction, to transport an E1’s symmetrical bandwidth.

DS0 Timeslot Multiplexor OPTION -MUX
The IP•Tube DLE1-MUX maps DSOs from a central site to as many as 31 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.

            • Remote Control of E1 Connection to Telco or E1overIP
• Installation performed by a single Technician 
       • Quick reversion to Telco during debug of E1overIP

E1 Link Protector OPTION -LPT 
The E1 Link Protector provides an automatic back up for E1 circuits with E1 Over IP connecting via Wireless Ethernet, Gigabit Ethernet, IP Satellite Services, xDSL,....

Lossless Data Compression OPTION -C 

The IP•Tube DLE1-C continuously detects idle and redundant data within each E1 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 DLE1-C models.

Alternator Load Balancing OPTION -ALT   
The IP•Tube DLE1-ALT Alternator option alternatively sends the IP packetized E1 frames on LAN 1 and LAN 2. The Alternator option enables fractional and full E1 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.

Protector OPTION -PRO 
The protector option utilizes the second LAN interface as a redundant path for the interconnection of the IP encapsulated E1 Circuit. The extension of the E1 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 IP•Tube also supports the transmission of multiple duplicate packets to support Mission Critical Circuit extension with redundancy that is only limited by the bandwidth provisioned. 

Pay-As-You-Grow Field Upgrades
The IP•Tube DLE1s are designed for Pay-As-You-Go growth from 1 E1 to 2 E1s. Customers can elect to economize initial installations, buy purchasing a single active E1 port and enable the additional E1 Port via a software-based license key.
Field Upgrade benefits are extended to our Industry-Best Loss less Data Compression. Just as E1 ports are field upgrade able, so is Loss less Data Compression. At any time, each E1 port on the IP•Tube DLE1 can be upgraded to Loss less Data Compression
with a simple software-based license key installation. If you determine that your IP•Tube DLE1 is best deployed with Loss less Data Compression, you're still in business with the per port field upgrade!

Rack Mount Kit
The IP•Tube family is ready for your most demanding central office or data center environments. With the Rack Mount Kit, IP•Tube products are easily installed in 19" and 23" racks. Easy access to both front and rear sides facilitates technician maintenance procedures.

Cellular phone service providers are able to save substantially by converting to a packet switch network from circuit based TDM leased lines. The Loss Less Data compression option provides a 40 to 1 compression, which minimizes the bandwidth required to interconnect, is especially well suited to Cellular communication links.

Engage's first deployment of the IPTube, in the Spring of 2000, was for an international interconnection of a Cellular Base Station to a Base Station Controller.

Broadband Service Providers

Companies, that are able to provide IP Ethernet access networks generate new revenue by offering traditional E1 leased line and private line services, such as:

Cable Operators
Cable operators connect traditional E1 leased line and private line services over their hybrid fiber coax (HFC) cable networks.

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

Utilities
Utilities generate new revenue by offering traditional E1 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 IP•Tube DLE1-Ecan provides CLECs with a way to back haul E1 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 E1 based communication equipment is made possible with the IPTube’s E1 Over Ethernet capability.