Teo NT1B-300TC-TSG - Manual (Page 2)

Termination Switch
The termination switch is located on the front of the NT1.
Available settings are OFF, 100
W, and 50W.
Set the termination switch to match the premises wiring
between the NT1 and the terminals. Several typical wiring
configurations are shown below, with the appropriate
termination switch setting.
Fixed or adaptive timing selection is not required.
The use of Category 3 or better unshielded twisted pair
cable with T568A or T568B connector wiring is
recommended. Distances shown are maximum for
24-gauge wiring cable, and may vary for other cable types.
Power Connections
The NT1B-300TC-TSG must be powered by the included Model
901034 Desktop Power Supply. Plug the power supply barrel
connector into the POWER jack on the NT1.
Terminal power is supplied through the NT1 for either of the
following configurations:
PS2 - Direct power feed on S/T jack pin 7 (-) and pin 8 (+),
5 watts maximum per terminal (10 watts total).
PS1 - Phantom power feed over the transmission pairs, S/T
jack pins 3/6 (+) and pins 4/5 (-), 4 watts maximum (total for all
terminals).
Installation and Troubleshooting
Connect the network U interface from the telco to the U LINE
jack on the NT1. Connect ISDN BRI terminals to either S/T jack
using four pair unshielded twisted pair (UTP) cable, Category 3
or better, with T568A or T568B wiring.
After the U and S/T cords are connected, connect the power
source to the NT1. Observe the indicator LEDs. The green
POWER LED should turn on as soon as power is applied. The
green STATUS LED should transition from off, to fast flash, slow
flash, then on steady as the U and S/T interfaces initialize. The
NT1 is fully activated when both LEDs are on steady. Be
patient; in some instances, the network may take up to 3
minutes to synchronize with the NT1.
If two S/T terminals are connected to the NT1, the STATUS LED
will light steady if either terminal has initialized through the NT1.
To check each terminal, connect only one at a time and verify
LED status.
Incorrect termination on the S/T (terminal) interface is a
common cause of unreliable terminal operation. Symptoms
include random data errors, intermittent STATUS indication, or
complete terminal malfunction. Network line synchronization
may not be affected. Refer to the wiring configuration diagrams
in the Termination Switch section for the appropriate termination
setting.
To fully operate with the network, the terminal equipment must
also be correctly programmed with required operating
parameters (such as SPID) that are provided by your telco.
Consult your terminal equipment documentation for
programming instructions.
Status Indicators
The operating state of the NT1B-300TC is displayed by the two
indicator lamps.
POWER: ON STEADY when power is applied to the NT1.
STATUS: OFF – No U interface (line error). Check connection
to telco network.
FAST FLASH (8/sec.) – Attempting to link U interface with the
telco network. A fast flash persisting longer than 15 seconds
indicates that the NT1 is in a maintenance mode that was
requested by the central office
SLOW FLASH (2/sec.) – U linked, S/T link not established with
terminal. Check connection to terminal.
ON STEADY – Normal operation. U linked, and at least one S/T
terminal linked.
Resetting the NT1
If the U interface is disconnected or disrupted, a loss of linkage
between the NT1 and the telco central office may occur. To
force immediate network and terminal resynchronization,
momentarily disconnect power to reset the NT1.
Removing power from the NT1 during normal operation will
temporarily disrupt network communication and will disconnect
any call in progress.
Teo Product Warranty
For a period of one year from date of end user purchase, but
not to exceed 16 months from date of manufacture, Teo
Technologies, Inc. warrants its products to be free from defects
in material and workmanship under conditions of normal use
and service. Warranty details are available on our Web site,
www.teotech.com.
13-280128 Rev. B
February 2012
Tone Commander Systems has changed
its name to Teo Technologies.
11609 49th Place West – Mukilteo, WA 98275-4255
(800) 524-0024 (425) 349-1000 Fax: (425) 349-1010
www.teotech.com