BT Redcare 5G GSM STU Troubleshooting guide

User/Installation Guide
(Non roaming version)
5G GSM STU

Redcare 5G GSM STU Installation manual - 04/07/2011
This manual contains information on the Redcare 5G GSM STU. It contains more detailed information
than that provided in the Quick start user guide provided with the GSM STU. The following products
are covered:
• Redcare 5G GSM STU
Fig 1. 5G GSM STU
Description
The 5th Generation Subscribers Terminal Unit (5G STU) is a communicator for signalling alarm
signals between a protected premises and an Alarm receiving centre (ARC). The 5G STU uses the
extremely reliable BT redcare network to convey the messages over a Redcare enabled BT analogue
PSTN line. A secondary communications path is provided using SMS signalling over the GSM
network. Even if an intruder cuts the line and jams the radio signals an alarm message will still
rapidly be sent to the ARC.
The 5G GSM STU is fully compatible with BT’s 21CN network upgrade program and connects to any
BT redcare enabled telephone line.
The 5G STU is fully ADSL compliant and does not require an additional ADSL microlter.
5G GSM STU User/ Installation Manual
PL1
Serial Port
PL2
Debug Point
GSM Engine
GSM Antenna
MMCX Connector
PL3 Sec/Ln
Mode Key
Set Key
8 Segment
LEDʼs
S
M
TNV Cover
Underside Plug-In
Connectors
Main Terminal Block TB1
PSTN + Earth
Connectors
LK1
Private Wire Link
LK3
Alarm 8/Panel Link

Redcare 5G GSM STU Installation manual - 04/07/2011
Pre-installation requirements
Before a 5G STU installation can commence, a BT RedCARE Service Order must be submitted to BT
RedCARE by the Alarm Receiving Centre. This ensures that the appropriate exchange connections
have been made and a BT RedCARE block terminal 92A, where required, has been provided at the
customer’s premises.
It is strongly recommended that a site survey is carried out to check for suitable GSM signal strength
at the proposed GSM STU location. The 5G GSM STU uses SMS messaging across the O2 GSM mobile
phone network, and for reliable operation a signal strength of 12 or greater (-90dB) should be
available at the location of STU installation.
Safety statement
The circuit board area, under the cover, is classed as a Telecommunication Network Voltage (TNV-3)
circuit. All other interconnection points are classed as Safety Extra-Low Voltage (SELV) circuits. It is
only necessary for this cover to be removed during installation of the PSTN wiring. A protective earth
connection is required to the terminal block TB5.
The 5G STU is designed for host-independent tment.
The host alarm panel or box into which the 5G GSM STU is installed must provide a RESTRICTED
ACCESS LOCATION in accordance with the requirements of BS EN 60950.
Suitable user protection to ensure compliance with BS EN 60950 should be present on the host or its
tted equipment. A hazardous voltage is one which exceeds 42.4V peak AC. or 60V DC. If you have
any doubt, seek advice from a competent engineer before installing this or other adapters into the
host equipment.
Static sensitive devices
Static electricity is present in our everyday lives. A static charge is generated by friction, and whenever
two dissimilar materials are separated. The imbalance of electrons causes a potential difference of
many hundreds of volts. On discharge, a large current ows for a short time.
Many electronic components can be damaged by such static charges. Component failure may not be
immediate or catastrophic. Electro-Static Discharge (ESD) can cause hidden damage to components,
which will affect their reliability.
It is recommended that precautions are taken against damage due to static electricity during the
installation and maintenance of the 5G GSM STU. Suitable ESD protection measures include ensuring
that you are earthed (via a wrist strap and a 1M resistor) whenever you handle the unit.
5G GSM STU siting
When surveying the site please remember that the GSM STU operates in a similar way to an ordinary
mobile telephone, therefore any restrictions on the use of mobile telephones in the area will also apply
to the GSM STU.
Premises such as hospitals, petrol stations, airports, blasting areas etc. may operate a mobile
telephone restriction in certain areas. Always ensure that the chosen site is free of any mobile
telephone restrictions and advise the end user so that they are aware, should any restrictions come
into force in the future.
Note: It is recommended to perform a signal strength test during a pre-installation site visit.
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5G GSM STU User/Installation Manual

Redcare 5G GSM STU Installation manual - 04/07/2011
Determine where the GSM STU enclosure will be eventually situated.
Place an O2 mobile phone or GSM STU at the location it is to be installed, switch it on and observe the
signal strength.
For reliable operation a signal strength of 12 or greater (-90dB) should be available at the location of
STU installation.
If the signal strength is weak, try to nd a better position for the 5G GSM STU unit. If required, a
higher gain extension antenna with an extension cable is available at extra cost from BT Redcare. (Part
No. 47536). https://www.btinstallershop.com/home.aspx.
Telephone line connections
Connect the 5G GSM STU to the BT RedCARE block terminal. Only one 5G STU may be connected to
any one telephone line.
WARNING: the block terminal contains telecommunication network voltages.
Please note that it is important to use the correct method of connecting the STU to the BT Block
Terminal 92A. The Block Terminal provides an insulation displacement connection (IDC) block for
the incoming phone line. No connections, other than those made by BT, should be made to this IDC
block. The STU should be connected to the screw terminals as shown. The 5G GSM STU is not polarity
conscious on its line terminals.
Fig 2. BT Redcare Block Terminal 92A
Power supply
The 5G GSM STU must be connected to a suitable power supply. The installer must ensure that the
rating of the power supply is greater than the combined rating of the 5G STU and any other apparatus
drawing power from the power supply.
The 5G GSM STU supply requirements are detailed on page 5
Note: when the 5G GSM STU is plugged on to a suitable panel the power connections must still be
made to the terminals marked +12V & 0V on TB1.
REN
The Ringer Equivalence Number (REN) for the 5G STU is 1.0. As a guide to the number of apparatus
that can be simultaneously connected to a line, the sum of REN values for each apparatus should not
exceed 4.0. A BT provided telephone is assumed to have a REN value of 1.0 unless otherwise marked.
If the 5G STU is used with an MCD, the combined REN will be 1½.
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Redcare 5G GSM STU Installation manual - 04/07/2011
Training courses
Redcare offer a free training course for installers of the Redcare service.
For further information call General Enquiries Tel: [phone].
5G GSM STU inputs
The STU has 11 screw terminal inputs plus tamper (T) & AC fail (F) for connection to the monitored
equipment such as an alarm panel. (3 inputs on the Fire STU)
(Note on GSM STU pin 8 is reserved for low signal strength, and pin 10 & 11 maybe reserved for path
test alarms in BSIA mode (F7=3). The alarm inputs are triggered by changing their voltage state.
5G GSM STU plug-in option
For “Plug-in” installation, alarm pin connections are made automatically when the 5G GSM STU is
plugged in to the host alarm panel. When tting the STU, check that the signals presented by the
alarm panel match those required by the STU, for the two sockets SK1 and SK2. The pins have been
designated the following functions on the 5G GSM STU:
Note: The alarm panel cannot make use of Pin 16 (Alarm Input 8) as this is reserved for “GSM Failure”
indication.
Note: when the 5G GSM STU is plugged on to a suitable panel the power connections must still be
made to the terminals marked +12V & 0V on TB1.
For plug-in installations, be sure that no wires are ever connected to the terminals 1 to 8 on TB1
as this may result in damage to the alarm panel. Terminals 9,10,11,T & F can be connected if these
channels are required in addition to those present on the plug-in connectors (SK1 & SK2).
Output relays
Three output relays are provided: Control, Return Path Signalling (RPS), and Line Fault. The use of
any, or all, of these functions is optional. For a basic installation these outputs are not required.
Note: If an output is to be connected to a device which produces transient voltages, such as a bell, the
device should be suppressed using a suitable protection diode.
Control output relay (CTRL)
This relay can be switched on or off by the alarm receiving centre (ARC) operator by sending and
output ON or output OFF command to the STU through the redcare network.
The output can typically be used to remotely reset an alarm panel, or to operate other devices such as
lights or door latches at the site.
Line fault output (LF)
The Line Fault Output is used to indicate, at the protected premises, that either or both the GSM and
landline (PSTN or Private Wire) communication paths have failed.
The ‘Line Fault’ relay contacts (Normally Open, Common, Normally Closed) are available for
connection on TB1. The maximum current rating of the relay contacts is 1 Amp.
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Redcare 5G GSM STU Installation manual - 04/07/2011
For plug-in installations, Line Fault connections are made automatically when it is tted in the host
alarm panel. The host panel must be programmed to accept this function.
At default the 5G GSM STU Line Fault output is set to comply with BSIA form 175 mode of working.
Other options are available as later described.
Return Path Signalling (RPS)
The RPS output is used to indicate, at the protected premises, that the opening/closing signal has
been sent to, and acknowledged by, the Alarm Receiving Centre.
To use the RPS function, at least one of the alarm inputs must be designated as an opening/closing
channel (usually channel 4). The RPS output will activate when an opening or closing signal is
detected. It will de-activate when the opening or closing signal has been acknowledged by the Alarm
Receiving Centre. It is allowable to have more than one input designated as an opening/closing
channel, but each must be acknowledged to de-activate the RPS output.
The RPS relay contacts (Normally Open, Common, Normally Closed) are available for connection on
terminal block TB1. To use this option, a warning device such as a piezo bleeper or external strobe
light should be connected through these contacts. The maximum current rating of the relay contacts
is 1 Amp
STU specications
Pin alarm inputs
• Logic High = +2.5V to +30V
• Logic Low = -0.5V to +0.8V
Logic level outputs
• Logic High = 3.0V @ 560μA max
• Logic Low = 0.4V @ 280μA max
With respect to the 0V terminal on TB1
Power Rating
• 5G GSM 12Vdc 80mA mean 350mA peak
Environmental
• Operating ambient temperature +5°C to +40°C
Relay contacts
• 30V 1A Max
Physical
Size = 168 x 115 x 36mm
GSM aerial installation
The Aerial supplied with the 5G GSM STU is designed for mounting on the top of an alarm panel.
Drill a suitable hole, (typically 11mm diameter) in the top of the box in which the GSM STU is tted.
Prevent swarf from entering the enclosure as it could cause internal short circuits.
Remove any burrs from the hole, pass the RF cable through it and place the antenna in position. It is
advisable not to bond the antenna onto the box at this stage. Wait until the system has been tested,
as it is difcult to remove once attached.
Try to route the RF cable away from any other wiring within the box to reduce the likelihood of
interference. Carefully connect the RF cable to the GSM module on the 5G GSM STU. The connector
is a micro-miniature co-axial (MMCX) screened type and is easily damaged.
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Redcare 5G GSM STU Installation manual - 04/07/2011
Telephone line selection (LK1)
The 5G STU is supplied ready to connect to the Public Switched Telephone Network (LK1 is not
tted). If the 5G STU is to be connected to a Private Wire (RedDIRECT) a suitable link must be tted
in the position marked LK1 under the TNV cover. For RedDIRECT PW working the 5G STU must be
congured with F3 set to 1.
Note: the LK1 link provide 600 ohm line matching for PW working and is only generally used on
legacy RedDIRECT circuits or for test purposes. For normal PSTN connection LK1 is NOT required.
If you have any doubts about the type of telephone line to which the STU is being connected, contact
Redcare for advice.
5G STU displays
The current status of the STU is displayed on the 2 X 8 segment displays. The STU will cycle through
the messages in 1 second steps.
AL = This is followed by the ALarm pins that are active (in the Alarm state). 00 if no alarms are active,
or the numbers of the pins outstanding. i.e 4 = pin 4 outstanding.
SS = the GSM Signal Strength is as follows. 0-31 or 99 = undetermined.
NC = Not Commissioned. The STU has yet to receive an UP STU command from the ARC
5G STU conguration
The 5G STU is factory supplied with the most common settings for most installations, so generally the
unit can be installed without the need to carry out conguration. However, if changes to the default
setting are required they can be carried out as follows.
Note: The 5G STU must be in the fully de-commissioned state to enter the conguration menu. To
enter the conguration menu press and hold the MODE button for 5 seconds. PP will be displayed on
the display.
The MODE button can be used to step cycle through the main menu as follows:
PP = Pin Polarity
OC= Message Select (Open Close)
iD = Set Hard ID number
PE= Pin Enable
F1 = Function digit 1 (Control Relay)
F2 = Function digit 2 (Line Fault Polarity)
F3 = Function digit 3 (Connection Type)
F4 = Function digit 4 (Line Monitoring Enable)
F5 = Function digit 5 (Serial Parallel)
F6 = Function digit 6 (GSM Enable)
F7 = Function digit 7 (Line Fault Relay Operation – BSIA)
LD = Load Default (Reset all variables to manufacturers default)
?? = Commit to microprocessor memory.
The SET button is used to enter the sub menu for each function.
Tip: Continually pressing the MODE button will always eventually return to the main menu and to the
?? exit point.
Tip: The main menu can only be exited at the LD or ?? prompts (see these sections for exiting
conguration mode).
Tip: If the state of conguration is unknown then it can be reset to the factory default settings from
the LD load default menu option.
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Redcare 5G GSM STU Installation manual - 04/07/2011
PP pin polarity
Pressing SET at the PP menu option enters the pin polarity sub menu. At factory default all inputs are
set to positive applied triggering. The input pin polarity can be changed by using the MODE button to
step through pins 1 to 11 t & F, and using the SET button to toggle the input polarity for that pin.
The following display symbols are used to denote positive applied or positive removed triggering:
Once all pins have been congured, the MODE button returns to the main menu.
OC Open Close message select
Pressing set at the OC menu option enters the OPEN / CLOSE sub menu. At factory default all inputs
are set to send ALARM / RESET messages, except pin 4 that is set to send OPEN / CLOSE messages
The message type for each pin can be changed by using the MODE button to step through pins 1 to
11, and using the SET button to toggle the message type for that pin.
The following display symbols are used to denote the pin message type:
O = Open / Close
A = Alarm reset.
Once all pins have been congured, the MODE button returns to the main menu
iD hard ID number
Pressing SET at the iD menu option enters the hard ID sub menu.
At factory default the unit has the last 4 digits of the serial number as its Hard ID.
Tip: The 4 digit Hard ID forms part of the secure encryption key for signalling and there is generally no
need to change this number.
The 4 digit number is Hexadecimal and can be in the range 0001 to FEFF. Should a change be required
the following procedure can be used. When the Hard ID sub menu is entered, the rst 2 digits of the
current Hard ID are displayed. A lit Dot above the digit denotes the digit that will be changed with
each press of the SET button. The MODE button cycles to the next digit. After setting the rst 2 digits,
the last 2 digits are displayed again with a lit dot to denote the digit that will change with the SET
button.
Once all 4 digits have been congured, the MODE button returns to the main menu.
PE pin enable
Pressing SET at the PE menu option enters the Pin Enable sub menu. At factory default the all inputs
are enabled.
Tip: There is generally no requirement to disable inputs, unused inputs can simply be left
disconnected.
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Redcare 5G GSM STU Installation manual - 04/07/2011
Should a change be required the following procedure can be used. The input pins can be changed by
using the MODE button to step through pins 1 to 11 t & F, and using the SET button to toggle the
input to Enabled or Disabled for that pin.
The following display symbols are used to denote pin enabled or disabled.
= is enabled
_ is disabled
Once all pins have been congured, the MODE button returns to the main menu.
F1 Function 1 - Control Output Relay
Pressing set at the F1 menu option allows the Function 1 value to be congured. At factory default
the F1 digit is set to 0. The function 1 (F1) value has the following functionality.
0 = Control output relay NOT energised at power up
1 = Control output relay energised at power up
Once the F1 value has been congured, the MODE button returns to the main menu.
F2 Function 2 - Line Fault relay
Presing set at the F2 menu option allows the Function 2 value to be congured.
At factory default the F2 digit is set to 1.
The function 2 (F2) value has the following functionality.
5G Classic STU
0 Line Fault relay de-energised when landline path has failed
1 Line Fault relay energised when landline path has failed
5G GSM STU
0 Line Fault relay de-energised when both landline and GSM paths have failed
1 Line Fault relay energised when both landline and GSM paths have failed
2 As 0, but Line Fault output (SK2 pin 15) inverted
3 As 1, but Line Fault output (SK2 pin 15) inverted
4 As 0, but Comms Fail output (SK1 pin 7) inverted
5 As 1, but Comms Fail output (SK1 pin 7) inverted
6 As 0, but Line Fault output (SK2 pin 15) and Comms Fail output (SK1 pin 7) inverted
7 As 1, but Line Fault output (SK2 pin 15) and Comms Fail output (SK1 pin 7) inverted
Once the F2 value has been congured, the MODE button returns to the main menu.
F3 Function 3 - Telephone line connection type & low tone levels
Pressing set at the F3 menu option allows the Function 3 value to be congured.
At factory default the F3 digit is set to 0.
The function 3 (F3) species the type of telephone line to which the STU is connected: either Public
Switched Telephone Network (PSTN) or Private Wire (PW) and the attenuation to be applied to low-
tone.
The type of telephone line specied affects the method used by the STU to detect line faults, and the
attenuation level affects the amplitude of low-tone output when the line is detected as being on or
off-hook.
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Redcare 5G GSM STU Installation manual - 04/07/2011
Tip: Connection type 0 will satisfy most PSTN installations, but types 2, 3 & 4 can be useful to address
some polling over speech (POS) faults caused by some phone type compatibility issues. The Redcare
helpdesk should be consulted for further advice.
Note: PW = Private Wire (private Circuit) connection. This connection type is only available for
specialised applications.
Once the F2 value has been congured, the MODE button returns to the main menu.
F4 Function 4 - Line monitoring Enable
Pressing set at the F4 menu option allows the Function 4 value to be congured.
At factory default the F4 digit is set to 1.
0 = Disable line monitoring
1 = Enable line monitoring (PSTN voltage and 20 minute forced poll on hook)
2 = Enable line monitoring (PSTN earth calling mode, 2 minute 20 sec forced poll on hook)
3 = Enable line monitoring (PSTN voltage only)
Tip:
Type 1 will suit the majority of installations (Default)
Type 2 is for Earth calling PSTN lines that may be associated with large older type PABX’s
Type 3 can be used where false disconnection of Redcare MCD is to be avoided after long duration
(>20min) telephone calls
Fast = 2 minute 20s communication check.
Slow = 20 minute communications check
Once the F2 value has been congured, the MODE button returns to the main menu.
F5 Function 5 - Pin / serial data enable
Pressing set at the F5 menu option allows the Function 5 value to be congured.
At factory default the F5 digit is set to 0.
Tip: The Serial alarm input is for future use and not to be used on 5G STU at this time.
All 5G STU’s should use the 0 setting only.
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