Specifications

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Telco Sentinel Installation and Operation Manual
INSPECTION
Inspection
Please examine your TELCO SENTINEL carefully for any damage that may have been sus-
tained during shipping. If any damage is present, please notify the shipper immediately and
retain the packaging for inspection by the shipper. The package should contain the TELCO
SENTINEL, a USB type A/B cable and a RJ11 phone cable. Manuals may be downloaded
from our web site.
Installation
Surge Protection
The TELCO SENTINEL has built-in resistance to voltage changes; we recommend that you
use a power surge protector or line conditioner on the incoming lines. Lightning strikes
and/or other high voltage surges may damage your TELCO SENTINEL and connected
equipment if it is not properly protected. For lightning protection devices, check out
www.polyphaser.com and www.itwlinx.com.
LED indicators
• “PWR” LED: Indicates that the Telco Sentinel is powered up (green.)
• “HOOK” LED: Lit when line is seized (off hook) (yellow.)
• “RING” LED: Lit when ringing is detected on line (red.)
• “TONE” LED: Indicates valid DTMF tone decode (red.)
USB Port
This type B USB port powers the Telco Sentinel and is used to interface the Telco Sentinel
to the computer via a virtual COM port. See the “USB Serial Setup” section of this manual
for more information.
Telephone (Telco) Jack
RJ11 jack for connection to a phone line.
Caller/Send Audio
The Telco Sentinel’s built-in electronic hybrid allows for audio to be recorded/monitored
from the phone line (caller audio) as well as for audio to be sent to the phone line (send
audio) by external audio interfaces.
Caller Level/Send Level
The front panel “Caller Level and “Send Level” adjustment trimmers may be used to adjust
the caller output audio and send input audio levels to the desired loudness.
Unbalanced Caller/Send Audio (3.5mm jacks)
Unbalanced audio connections can be made via the Caller and Send 3.5mm TRS jack con-
nections. The TRS jacks are configured for dual mono output/input which means that mono
audio is carried on the tip well as the ring and ground is provided on the sleeve of each con-
nection.
Balanced Caller/Send Audio (Terminal Block)
Balanced audio connections can be made via the 5-position pluggable euro-style terminal
block labeled “Audio.” See below for a connector pin-out.
SEND SEND GND CALLER CALLER
–+ –+
NOTE: All connections and indicators are noted on the top cover label.