T-1 Repeater and Amplifier for customer owned cable
Unit supplied with two screw terminal and two RJ-45 adapters.
Note: This product is NOT intended for 10BaseT or Ethernet. T1 modulation is designed for use with twisted pair solid wire phone cables. The T-extender does NOT extend ethernet connections... only T1 connections. To extend ethernet 10/100/100BaseT cables, see our Ethernet-Extender here.
Each pair of T-Extenders may be located up to 5000 feet apart. Solid copper 22 AWG two twisted pair is the preferred cable for connection between T-Extenders. Smaller wire sizes will reduce the functional distance between T-Extenders. Connection to the T-Extender is made through RJ-45 modular connectors or 4-wire screw down barrier strips. Both types of connectors are standard on the T-Extender.
The DCB T-Extender is often powered by a small wall-mount transformer. 12, 24, -48, and 125 VDC versions are available. It is used to extend connections between T-1 equipment such as PBXs, T-1 multiplexers, T-1 line drivers, T-1 local multiplexers or any other T-1 equipment requiring
long customer owned cable runs. T-Extenders may be used to connect this equipment across a campus, between floors of a high-rise office building or between office buildings with underground cable connections.
While stand-alone units are most commonly used, a 1U rack mount is available that mounts three T-Extenders in a 19" rack. A 20 slot chasis is also available which contains up to 20 board-level T-Extenders and common power supplies.
T-Extenders can also be used to extend the distance between any T-1 equipment (DSU, channel bank, router, etc.).
The T-Extenders are best used in pairs. If you have a T1 CSU that is limited to 655 feet, connected to a device limited to 655 feet, and you put the T-Extender at one end, the T-Extender will drive the extra distance. However, the far end device will still be limited to 655 feet and will not likely have sufficient "drive" to reach the far end. The T1 transmitted signal is the issue addressed by the T-Extender, so in this case, the line would be error-prone or possibly only work in one direction. For cable runs greater than about 5,000 feet, additional T-Extenders may be cascaded
Extends T-1 bi-polar signal
Up to 5000 feet between T-Extenders
Up to 5000 feet to equipment with ALBO (Automatic Line Buildout)
Up to 655 feet from ABAM signalling equipment with 4-wire cross connect cabling
Two twisted pair solid copper 22 or 24 AWG; standard telco T1 cable if UTP category rated cable is used, CAT 3 is recommended.
We do NOT recommend CAT 5 cable. Although it often works well, CAT 5 cable has been shown to cause problems with many T1 installations.
Other cable types will affect operational distance.
Front panel power LED
RJ-45 modular 8-conductor connectors (A & B)Connect T-Extender transmit pair to the receive pair of the next T-Extender or T-1 equipment. T-Extender is not polarity sensitive.With "To Telco" Connector # 9502122
Pin 1 = Receive +
Pin 2 = Receive -
Pin 4 = Transmit -
Pin 5 = Transmit +
With "To Customer" Connector # 95021724-wire screw down barrier strips # 5003011
Pin 1 = Transmit +
Pin 2 = Transmit -
Pin 4 = Receivet -
Pin 5 = Receive +
1 = Receive +
2 = Receive -
3 = Transmit -
4 = Transmit +
A cable cross-over is required between two Extenders if using straight RJ-45 cables. This cable connects the receive pair of one Extender to the transmit pair of the other Extender.
Connectors A and B are electrically identical. Either one may be used as the "demarc" side or the "CPE" side of the Extender.
Power requirements: 120 VAC, 3 watts wall mount transformer or
12, 24, -48, 125 VDC, or 240 VAC optional
Temperature: -40C to +70C Humidity: less than 95% non-condensing 7" x 5 1/4" x 1 1/2"
Rear view of DCB T-Extender with one of each connector
(shown without anodized panel to emphasize the connectors)
9902095 Rack with three T-Extenders
T-1 T-Extender, Tips, Tricks, and Diagnosis An in-depth discussion on the quickest way to install, test, and diagnose problems with T-1 extender or repeater problems. This is the documentation provided in our recommended T-1 installation accessory kit. Written specificially for our T-Extenders, but it applies to any T-1 repeater. T-Extender, Tips, Tricks, and Diagnosis
T-1 Cables and Cross-Talk We receive many questions about what kind of cable works best for T-1 extensions. Many people mistakenly believe Cat-5 or Cat-6 LAN cable works well. Here's the scoop... a technical discussion about why you should use real T-1 cable for every T-1 installation, and some manufacturer's part numbers. T-1 Cables and Cross Talk
|One "To Telco" RJ-45 connector, One "To Customer" RJ-45 connector, and two screw terminal connectors are included with each T-Extender.|
|Item Number||Description||Price||Buy Now!|
|T-Extender||T-1 Line repeater for up to 5000 feet w/ 120VAC power input||$ 495||Qty:|
|T-Extender/12VDC||T-1 Line repeater for up to 5000 feet w/ 9-18 VDC power input||$ 570||Qty:|
|T-Extender/24VDC||T-1 Line repeater for up to 5000 feet w/ 19-36 VDC power input||$ 570||Qty:|
|T-Extender/48VDC||T-1 Line repeater for up to 5000 feet w/ 36-72 VDC power input||$ 570||Qty:|
|9501030||External 125 VDC power supply for standard T-Extender||$ 125||Qty:|
|9500095||Customer's T-Extender to telephone company demarc straight-through RJ45 cable||$ 12||Qty:|
|9500099||Customer equipment to customer equipment T1 RJ45 crossover cable||$ 12||Qty:|
|9502122||Additional -To Telco- RJ adapter||$ 12||Qty:|
|9502172||Additional -To Customer- RJ adapter||$ 12||Qty:|
|5003011||Additional screw terminal adapter||$ 12||Qty:|
|T1-KIT||T-1 installation accessory kit||$ 49||Qty:|
|9500106||T-1 loopback plug, RJ-45/48C||$ 5||Qty:|
|9902096||19" rack bezel for a single T-extender||$ 15||Qty:|
|9902095||19" rack shelf for 1 to 3 T-extenders||$ 75||Qty:|
|L-1||20 slot 19" rack chasis||$ 1,500||Qty:|
|9902092||Wall mount plate.||$ 10||Qty:|
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