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Brooktrout TR1034™ Fax Boards

Ordering T1/RBS Service for Brooktrout TR1034 boards

Items in bold are Brooktrout recommended.

When you order T1/RBS service from the telephone company, give its representative the following information:

Product Manufacturer: Brooktrout Technology
 
Product Name: TR1034+PxH-T1
(where ‘x’ denotes 4, 8, 16, or 24 channel enabled card)
 
T1 Service Type Robbed-Bit Signaling (RBS), four-wire
 
Signal Protocol: E&M Wink or E&M Immediate
 
Line Coding: B8ZS or AMI
 
Frame Mode: Extended Super Frame (ESF) or Super Frame (SF) / D4
 
Channels: 1-24
 
Dial Tone: Optional
 
CSU: None on-board
Note: The FCC requires an external CSU/DSU device to be installed on any T1 digital line supplied directly from your local telephone service provider.
 
DNIS Digits: DTMF or Pulse
 
Wall Jack Required: USOC-RJ-48C
 
Connector on TR1034 board: (See image below)
 

Additional info on 'T1 Service Type': When using a Brooktrout TR1034 board, the type of T1 line that must be supplied is a Robbed-Bit Signaling (RBS) T1 line, which also may be described as an A/B signaling T1 line, or an E&M tie trunk. This type of signaling is in-band, meaning the signaling info is carried on the same channel as the traffic. The physical connection must be a 4-wire connection, no other type of physical connection is supported by the TR1034 board.

Additional info on 'Signal Protocol': The TR1034 board needs the signal protocol to be consistent across all T1 channels, in both directions. When Brooktrout says E&M, they mean that the signaling bits do whatever the A-bit does; your telco representative should know what that means.

Connecting the TR1034 board to T1 Telephone Service

Hint: If your telephone service provider or PBX support people aren't familiar with the TR1034 boards, and thus are not sure how to treat it, you may tell them to view the TR1034 board as a PBX. Your telco people should set up a "tie trunk", or "tie line", from their side to the TR1034 board, just as if they were setting up a line to a PBX. The service must be tie line/tie trunk. Off-premise extensions, or stations, are not supported.

Connecting the TR1034+PxH-T1 board to T1 Telephone Service


 

Cable note: Although CAT5 cable will suffice in many situations, please bear in mind that CAT5 cables typically use an unshielded twisted pair, or UTP. If you want to safeguard as best as possible against any electromagnetic interference, then ideally you'll have a cable that has the receive pair and the transmit pair shielded separately. This type of cable is frequently referred to as an ISTP cable, for Individually Shielded Twisted Pair.

Additional info on signal regeneration, and CSUs: The distance between the last signal regeneration point on the T1 circuit and its termination point (connector on the TR1034 board) determines whether you must connect the TR1034 board to an external CSU (Channel Service Unit) or directly to a T1 circuit. When we say "distance", we mean cable length, not the straight-shot distance from the last point of signal regeneration to the TR1034 board.

If the last point of signal regeneration on the T1 circuit is less than 500 feet from the TR1034 board, you do not need to connect the TR1034 board to a CSU. If the distance from the TR1034 board to the last point of signal regeneration exceeds 500 feet (even if installed behind an in-house PBX system), you must connect the TR1034 board to an external CSU device and the CSU to the T1 circuit. Note: The FCC requires an external CSU/DSU device to be installed on any T1 digital line supplied directly from your local telephone service provider.

See the Do I Need a CSU for My T1? White Paper for more information.

©2004 Brooktrout, Inc, All right reserved.

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