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IP Express GT1IP Express MLBH-E1
IP Express GT1-DI
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IP Express GT1-DI

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IP Express GT1-DI is a high performance, bandwidth scalable, WAN router or bridge with 4 T1 ports that have flexible Drop and Insert capabilities. Point to Point and Frame Relay Wide Area Networking Protocols, with 24/7 proven interoperability, are fully supported on the T1 channels allocated to the internal WAN Router or Bridge.

The 4 T1 ports are able to independently connect T1 based Telecommunication Equipment and Ethernet LANs to 1 or 2 remote locations. A WAN Router or Bridge, 1 to 3 T1 Drop and Insert Interfaces and a long haul T1 DSU/CSU are
integrated to create a complete T1 Data and Voice Multiplexor.

T1 WAN Router or Bridge with Drop and Insert Mux:



Point to Point Access for Voice and Data:

Interconnect Remote LANs and PBXs Over T1
IP Express GT1-DIs are used to connect Branch Office PBXs and Phone switches to an organizations
headquarter’s Phone System, which has access to the PSTN, to save money on Local Access Phone charges and interoffice calls. The remote LAN interconneciton to the Headquater's LAN is utilized for centralized database access, shared file servers, print servers, etc...

Teleconferencing Equipment Interconnect
IP Express GT1-DIs provide T1 based Teleconferencing Applications with a very cost effective solution to share a T1 connection with the LAN.

Remote Management of Telecom Switches
IP Express GT1-DIs enable Telecommunication Service Providers to remotely manage their Telecommunication Switches over their T1 connection. Allocation of T1 bandwidth to the LAN interface provides for an always on network connection to the Ethernet Management interfaces of the Telecommunication Switch.

Internet Access and PBX Connection to PSTN
IP Express GT1-DIs are the ideal Customer Premise Equipment for Competitive Local Exchange Carriers that are provisioning Internet Access and PBX Connection to the PublicSwitch Telephone Network.

Technicial Specifications: 

LAN Network Interface: 
  • 10/100 BaseT Ethernet Port
  • Auto-negotiate or Configured
LAN Network Protocols:
  • IP Multicast support
  • Spanning Tree Bridging
WAN Network Interfaces: 
  • Two T1/FracT1 CSU/DSU ports 
WAN Network Protocols: 
  • PPP (RFC1548/1332/1334, PAP)
  • Multilink PPP (RFC 1990)
  • Frame Relay (ANSI ANNEX D, LMI, RFC 1420)
Routing Protocols Supported: 
  • RIPv1, Static 
T1/Fractional T1 Specifications: 
  • Framing - ESF or D4
  • Coding - B8ZS or AMI
  • Supports DS0 assignments from 1 to 24 (64Kbps to 1.536Mbps)
T1 Diagnostic: 
  • Loopback Test
    Network, Internal, Framer,
  • Bert Tests
TFTP Online Upgrade Capable 
  • Fully operational during upgrade 
Network Security: 
  • Full On Source, Destination;
    Port and Flag IP Packet filtering
  • Network, Device and Application
  • 9" (L) x 7.3" (W) x 1.50" (H)
  • T1 Wan D&I Connectivity in
    1/2 of a 1U19" rack
  • Telnet support with Edit and Paste
  • Console Port for Out of Band
  • SNMP support (MIB I, MIB II)
  • Remote configuration,
    monitoring, & reset
  • Safety -IEC60950
  • EMC - CFR 47 Part 15 Sub Part B:2002
                EN55024, ICES-003 1997
                CISPR 22 Level A
  • Telecom - Part68
  • CE
  • Locking Power Connector
  • 12-24 VDC 1.0A
    Ships with Universal Adapter
  • Optional -48V 0.25 Amp
  • Hot Standby with 2nd Power


How to Order: 

Part No Description Notes 
0DI-1544-0x IP•Express GT1-DI, xT1 (x=2 - 4 Ports) Base Model Specify # of
T1 Ports Enabled
UDI-1544-0x IP•Express GT1-DI T1 Port Upgrade Enable Additional T1 Ports (up to 4) 
Power Options  Specify as suffix 
DCMOD Power 12/30 VDC with
Ships with Universal Adapter
90/240 50/60
WIREDC Power 12/30 VDC
Stripped Wire Screw
N48VDC Power Supply Module
Negative 48 Volt DC
Isolated Negative 48 Volt Power
Hot Standby
Rack Mount Option  Specify as suffix
RACKMNT 19" Wide Rack Mount Brackets Enclosure Nut Serts Installed