Cellular Backhaul

IP•Tube G4 T1 Standard Features

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

Dynamic Host Configuration Protocol - DHCP 
The IP•Tube G4 T1 can be configured to obtain its Internet Protocol network parameters: IP Address, Subnet Mask, Default Gateway, DNS; from a local DHCP server.

Domain Name Addressing
IP•Tube G4 T1 can be configured to use a Domain Name for the remote IP•Tube in place of a fixed IP address. Supports mobile multi service provider installations with ease.

Dynamic DNS 
IP•Tubes can be configured to register their IP address with Dynamic Domain Name Servers for discovery by the IP•Tube at the other end of the T1 circuit. DDNS support combined with DHCP make installations Name-based which is very easy to setup and maintain when compared to Static IP addressing.

Secure Socket Shell - SSH
Engage’s Secure Socket Shell, which is based upon industry proven Open SSH and FIPS 140 approved Open SSL version 2.0, provides secure encrypted communications between SSH clients such as OpenSSH, SecureCRT, and PuTTY and the IP•Tube's Command Line Interface.

SNMP
The IP•Tube UNO T1 is able to be fully managed with SNMP via standard and private MIBs. Large scale deployments of IPTubes with centralized management have made SNMP support a priority. SNMP Traps for error events enable proactive service fault isolation.

Full T1 Connection Across Two ADSL Lines
The IP•Tube G4 T1's two Ethernet interfaces are able utilize two ADSL Ethernet Modems, that have opposite high speed direction, to transport a T1's symmetrical bandwidth.

IP•Tube G4 T1 Options

Ethernet Switch OPTION - SWITCH
The IP•Tube G4 T1 is available with a five port 10/100 Ethernet QoS switch integrating a high-performance switching fabric with four priority queues. Advanced features include 802.1p/IPv4/IPv6 traffic classification, full IEEE 802.1Q VLAN, RMON, SNMP, Port Monitoring and Layer 2 firewall. 

QoS determined by destination MAC address, port ID, IEEE 802.1p and multimedia traffic tags, IPv4 Type of Service (TOS), and Differentiated Services (DiffServ).

Rate Limiter

The 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. 

SuperTube Option

Engage Communication super sizes IP•Tube T1 Circuit extension over Ethernet Packet networks.  The Engage SuperTube option combines four T1 circuits into one IP packet stream.  The SuperTube is designed to support Cellular Backhaul’s tight latency requirements when multiple T1 circuit interconnects are to be extended over Packet networks.

The typical way to extend T1 circuits across packet networks is for each T1 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 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.

Alternator Load Balancing OPTION -ALT 
The Alternator option alternatively sends the IP packetized T1 frames on two Ethernet interfaces, balancing the load. The Alternator option enables fractional and full T1 circuits to be split over two IP WAN connections such as ADSL.

Full T1 Connection Across Two ADSL Lines 
The IP•Tube G4 T1's two Ethernet interfaces are able utilize two ADSL Ethernet Modems, that have opposite high speed direction, to transport a T1’s symmetrical bandwidth.

GPSDO Stratum 1 Clock OPTION -GPSDO

The GPSDO Option receives GPS satellite timing signals to control an onboard oscillator providing from a T1 Stratum 1 reference clock. The GPSDO Option utilizes a mixed-signal phase lock loop GPS driven frequency module to generate extremely accurate 1.544MHz T1 references clocks that are frequency locked to the Global Stratum 1 source. The Stratum 1 clock is the basis for all telecom voice and data interfaces, required to assure proper synchronization of signals and call quality.

T1 Private Line Services over IP

The IP•Tube G4 T1 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.

Interconnection of T1 based data communication systems over wireless as a primary or back up connection is a major application of the IPTube.

For over eight years the IP•Tube has proven itself around the world as an effective method for using Commercial Off the Shelf Wireless Ethernet Bridges to interconnect T1 circuits.

The IP•Tube's Assured Delivery Protocol has the sophistication required for solid performance across a wide range of wireless connections.

The use of parallel Wireless Ethernet links minimizes the latency and Radio’s packet processing requirement. 
Note: Parallel Application requires Ethernet Switch Option.

IP•Tube G4 T1s  provide transparent interconnection of Base Stations, Base Station Controllers and Mobile Switching Centers over IP Ethernet packet-switched networks.

Cellular service providers save substantially by converting to a packet switch network. The Lossless Data compression option, which is especially well suited to Cellular communication links, minimizes the bandwidth required to interconnect.

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 56 to 1 compression, which minimizes the bandwidth required to interconnect, is especially well suited to Cellular communication links. 

Engage's first deployment of the IPTubeT1, in the Spring of 2000, was for an international interconnection of a Cellular Base Station to a Base Station Controller.

The SuperTube Option reduces the overhead and packet frequency while lowering latency which makes cell backhaul a possibility over Wired and Wireless connections.

Note: The Ethernet Switch Option has the sophistication to support Ethernet Native Base Station applications with QOS and rate limiting.

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

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 IP•Tube 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.

International Toll Bypass

The IP•Tube T1’s most dramatic cost savings is when it is used for the international interconnections of TDM based telecommunication equipment. The IP•Tube E1 is interoperable with the European TDM standard E1.