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IP Tube GT1
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IP Tube GT1

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Enable One to Four T1 interfaces for T1 over IP Voice and Data
The IP•Tube GT1 is available with one to four T1 interfaces and dual 10/100 BaseT Full/Half Duplex Ethernet Interfaces. The T1 interfaces have configurations that for provide independent protocol, compression, packet sizing, buffering, clocking, framing, coding and channel settings. Enable additional T1 Ports as needs expand using a software-based license key. The protocols supported are IPTube, CESoIP, and HDLCoIP.

IP Tube GT1 Standard Features

Transparent Interconnect

The IP•Tube GT1’s transparent operation maintains the proprietary signaling required to support PBX features such as call conferencing, call forwarding, caller ID and SS7. Legacy phone equipment investment is preserved. Transparent support for Modem, Fax, or Data circuits. Voice quality is not compromised.

 Assured Delivery Protocol
In order to assure high quality communications over links with intermittent or noisy performance, such as Wireless or Broadband over Power Line, the IP•Tube GT1 employs Engage’s robust Assured Delivery Protocol with the following benefits:

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

 Dual LAN Interfaces
All IP•Tube•GT1 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 T1 Connection Across Two ADSL Lines
The IP•Tube GT1’s two Ethernet interfaces are able utilize two ADSL Ethernet Modems, that have opposite high speed direction, to transport a T1's symmetrical bandwidth. 

Assured Delivery Protocol: 

In order to assure high quality communications over links with intermittent or noisy performance, such as Wireless or Broadband over Power Line, the IP•Tube GE1 employs Engage’s robust Assured Delivery Protocol with the following benefits:

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

Service Quality Packet Prioritizing
The IP•Tube GT1 uses the Type of Service byte in the IP packets to prioritize the encapsulated T1 frames. The setting of the TOS byte can be used to ensure that the real time TDM data from the IP•Tube GT1 is ensured high priority.

 VPN Network Management
Interconnecting the IP•Tube GT1 through a Virtual Private Network with a sufficient real time committed information rate ensures that the required quality of service is provisioned. The IP•Tube GT1's second Ethernet interface provides a management port when the first Ethernet interface is connected to a VPN. Each Ethernet LAN interface features independent IP network configurations.





IP Tube GT1 Options: 
Lossless Data Compression Option

The IP•Tube-GT1C detects idle/redundant data within each DS0 resulting in as much as 56 to 1 bandwidth savings. T1 over IP bandwidth is not consumed by silent or redundant circuits. Management of the IP•Tube GT1 is accomplished with a Command Line Interface that is accessed through a Console or Telnet connection. Common templates provide for cut and Paste configuration.


 Alternator Load Balancing Option
The IP•Tube GT1-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. The cost of interconnecting T1 communication systems across packetized xDSL is a fraction of long distance leased T1 circuit costs.


Protector Option
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.  

 Pay-As-You-Grow Field Upgrades
The IP•Tube GT1 are designed for Pay-As-You-Go growth from 1 T1 thru 4 T1s per IP•Tube GT1. Customers can elect to economize initial network installations, by purchasing their IP•Tube GT1 with a single active T1 port. As the network grows enable additional T1 Ports via a software-based license key. Field upgrade benefits are extended to our Industry-Best Lossless Data Compression. Just as T1 ports are field upgradeable, so is Lossless Data Compression. At any time, each T1 port on the IP•Tube GT1 can be upgraded to Lossless Data Compression with a simple software-based license key installation. If upon installation, you determine that your IP•Tube GT1s are best deployed with Lossless 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.

Technicial Specifications: 

LAN Network Interface: 
  • Two 10/100BaseT Full/Half Ethernet
  • Auto negotiation or Configurable Speed and Duplex
LAN Network Protocols Supported: 
  • DHCP • DNS Address Discovery • Dynamic DNS
1 to 4 Duplicate Packet Transmission: 
  • Resilient performance through a lossy interconnect. 
T1/Fractional T1 Specifications: 
  • One to Four Port Models • Connects directly to T1 or DS1
  • Framing - ESF or D4/SF • Coding - B8ZS or AMI
  • Supports DS0 assignments from 1 to 24
  • Not Contiguous Configuration x-y,z Supported
T1 Over IP Protocol: 
  • TDM Over IP • Circuit Extension Services Over IP • HDLC Over IP
  • Frames Per Packet Configurable 8 to 56
  • Low Latency Mode: 1 millisecond 8 T1 frames
  • Max Payload Mode: 5 millisecond 56 T1 frames
Lossless Data Compression Option:
  • Detects idle and redundant data within each Voice Circuit (DS0)
  • Interconnect bandwidth is not consumed by silent or redundant data
  • Low Latency 8 to 1 Compression, settings from 8 to 1 to 40 to 1
TFTP Online Upgrade Capable (FLASH ROMs) 
  • IPTube is fully operational during upgrade
Quality of Service Support: 
  • IP Type of Service (TOS) CLI configured • 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
  • Telnet support with Edit and Paste Template Files
  • Console Port for Out of Band Management
  • SNMP support (MIB I, MIB II) • Remote config., monitoring, & reset
Rear Panel/Power: 
  •  10-30 VDC, 1.0A. • Screw Locking Connector
  • Universal Adapter 100/240 VAC 50/60 Hz
  • Optional -48V 0.25 Amp • Hot Standby
  • Dimensions: 9" (L) x 7.3” (W) x 1.50” (H)


How to order: 

Part No Description Notes 
056-1544-0x IP•Tube GT1, xT1 (x=1 - 4 Ports) Base Model Specify # of T1 Ports Enabled 
U56-1544-0x IP•Tube GT1 T1 Port Upgrade Enable Additional T1 Ports (up to 4) 
057-1544-Cx IP•Tube GT1-w/xT1 Compression w/Lossless Data Compression Option 
U57-1544-Cx IP•Tube GT1-Compression Upgrade Enable Lossless Compression T1 (up to 4) 
Base Options  Specify as Suffix 
ROHS ROHS compliant materials and processes Restriction of Hazardous Substances no PB 
PRO Protector Option Fault Tolerant Network Interconnect 
ALT IP•Tube GT1-Alternator Load Balancing Enables Altenator Load Balancing 
Power Options  Specify as suffix 
DCMOD Power Supply Module 12/26 VDC ADP CON Ships with Universal Adapter 90/240 50/60 
WIREDC Power Supply Module 12/26 VDC Screw Term 
N48VDC Power Supply Module Negative 48 Volt DC Isolated Negative 48 Volt Power 
 Hot Standy Configuration Specify an additional Power Module Suffix 
Rack Mount Option   
RACKMNT 19" Wide Rack Mount Brackets Enclosure Nut Serts Installed