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.
GT1 Standard Features
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.
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.
|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
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.
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.
Data Compression Option
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.
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.
Engage Communication super sizes IPTube’s T1/E1 Circuit extension over Ethernet Packet networks. The Engage SuperTube option combines four T1/E1 circuits into one IP packet stream. The SuperTube is designed to support Cellular Backhaul’s tight latency requirements when multiple T1/E1 circuit interconnects are to be extended over Packet networks.
The typical way to extend T1/E1 circuits across packet networks is for each T1/E1 to be encapsulated into individual IP packet streams. The SuperTube Sized IPTube reduces the encapsulation overhead bandwidth and the packet frequency by 75%. The reduction of packet frequency enables network processors that are pressed with the low latency packet processing.
Cellular Backhaul has latency requirements that can be as stringent as four milliseconds. In order to rate adapt the clock and to take into account the jitter of the Ethernet buffering of the circuit extended packets is required. The frequency of the packets may need to be as low as 250 micro seconds to meet the latency and buffering requirements.
The packet processing for 4 bidirectional T1/E1 circuits at 250 microseconds packet interval full duplex is 32,000 packets per second. 32,000 packets per second full duplex is not something that 802.xx and WiMax wireless radios are able to reliably process. The SuperTube option cuts the packet processing requirement to 8,0000 packets per second which can be handled with ease by commercial grade 802.xx and WMax radios.
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.
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!
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