Teo NT1B-300 User Manual

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Installation

The NT1B-300 Rack houses 24 Tone Commander
NT1B-300TC ISDN Network Terminations
in a 19” rack, 23” rack, or wall mount
configuration. The rack is also compatible
with Lucent NT1B-300 NT1s.

The rack supplies power to the NT1 units
and terminal equipment connected to the
NT1s from an integral power supply. An
optional NT1-200 Battery Backup Power
Supply can be added to the NT1B-300
Rack to provide uninterrupted NT1 and
ISDN terminal power during a power failure.

Instructions

Specifications

NT1B-300 Rack with Power Supply

Capacity ......................................... 24 NT1s (48 ISDN BRI terminals)

Physical Dimensions ...................... 5.22” H x 17.25” W x 7” D (fits 19” or 23” rack, 3U rack height)

Weight ............................................ 7 lbs. without NT1s; 12 lbs. with 24 NT1s

Operating Temperature .................. 0° – 40° C (32° – 104° F)

Humidity ......................................... 5% to 95%, non-condensing

Short Circuit Protection ................... Individual self-resetting current limiting for each NT1; 20 W max. per NT1

Standards Compliance ................... UL, cUL 60950

Input Power Requirements ............. 120 VAC, 60 Hz, 5 A max.

Output Power ................................. 48-55 VDC, 240 W max.

Contents of Shipping Box

• NT1B-300 Rack with Power Supply

• 19”/23” mounting brackets (2 each)

• 10-24 x ¼” mounting bracket screws (4 each)

• Installation Instructions (this document)

Optional NT1B-300 Rack Locking Kit (Model 102933)

Important Safety Instructions

• This equipment is intended for installation in a restricted access location (dedicated equipment
rooms, equipment closets, or the like) in accordance with Articles 110-16, 110-17, and 110-18
of the National Electrical Code, ANSI/NFPA No. 70.

• Never install telephone wiring during a lightning storm.

• Never install telephone jacks in wet locations unless the jack is specifically designed for wet

locations

• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.

• Use caution when installing or modifying telephone wires.

• Do not mount the NT1B-300 Rack within 12” of a heat source.

• The socket-outlet shall be installed near the equipment and shall be easily accessible.

13-280113 Rev. B

September 2007

Tone Commander NT1B-300 Rack Installation Instructions

Rack Mounting

1. The NT1B-300 Rack can be mounted in a n EIA standard 19” commercial or 23” telco rack.

2. Attach the mounting brackets to the rack in a 19” or 23” mounting position as needed, using the
supplied mounting bracket screws.

3. Mount the rack to the 19” or 23” rack standards using suitable fasteners.

Bracket Positions – 19” Rack Bracket Positions – 23” Rack

Wall Mounting

Note – When mounting the NT1B-300 Rack in conjunction with a Battery Backup unit, refer to the

NT1-200 Battery Backup/NT1-200 Add-on Battery Installation Instruc tions (doc. #13-102688)
for proper mounting positions.

1. Remove all NT1 units from the rack. Unplug the power supply from the wall outlet.

2. Attach the mounting brackets to the rack in the wall mounting position, using the supplied mounting
bracket screws.

3. Fasten a ¾” plywood sheet to the wall.

4. Hold the rack up to the wall to mark the hole locations, then pre-drill the mounting holes for the rack.

When locating the rack make sure:

• the power supply fan and vents are not obstructed and there is good air flow around the rack.

• there is enough room to tilt the rack forward to access the cables on the back and enough room to

route cables. When mounted with NT1s installed, the rack extends 9.25” from the wall.

• the power cord can reach a local 120 VAC, 60 Hz, single phase grounded power outlet.

5. Attach the rack to the plywood using four suitable fasteners (such as #10x¾” pan head self-tapping
screws). A fully loaded NT1B-300 Rack weighs 12 lbs.

6. With no NT1s installed in rack, remove the top bracket mounting screw on each side of the rack and
carefully tilt the rack forward to connect ribbon cable connectors. Leave enough slack in the ribbon
cables to allow the rack to properly tilt forward for access after installation. After all cables are
connected, replace and tighten mounting screws and install the NT1s.

Wall Mount Bracket Positions Tilting Rack for Cable Access

Page 2 13-280113 Rev. B

NT1B-300TC Installation

Carefully insert each NT1B-300TC into the appropriate slot in the NT1B-300 rack, with the indicator lights
oriented at the top left. The rack connectors are offset to prevent incorrect installation. Slot numbers on the
front of the rack correspond to 50-pin connector pinouts listed in Table 2. NT1s may be inserted or
removed from an operational rack without affecting the performance of other NT1 units. Make sure all NT1s
are oriented properly and fully seated in their rack connectors and verify that the termination switch settings
are correct. Refer to the NT1B-300TC installation manual (doc. # 13-280111).

To prevent unintentional removal of NT1 units, install optional locking brackets (Tone Commander Model

102933) after all NT1s are installed. Align the brackets with the mounting holes on the front of the rack and
push in the plunger on each panel fastener to secure them.

Rack with NT1B-300TCs Installed – Locking Bracket Installation

13-280113 Rev. B Page 3