Centsys G-Switch-22 User manual

6. G-SWITCH-22 GSM Module identification
The G-SWITCH-22 GSM module allows up to 300 individual users to
activate a maximum of two outputs on the module using their mobile
phones. These outputs can be used to open a gate, activate an alarm
system, turn on a borehole pump , etc. Activation can be either via a
missed call (no charge), or a pre-specified text message (SMS).
In addition, users can also be notified by SMS, of the activation of either
of two inputs on the module, in the event of an alarm activation, a power
failure , etc. An optional online interface allows for easy programming of
the module.
May require additional external switchgear
1. Introduction
The G-SWITCH-22 GSM module uses the GSM mobile phone
network to enable remote control and communication between itself
and up to 300 users via their mobile phones. A valid, and activated
SIM card is required in order to use the module on the GSM network.
4. General description
When programming the , each user’s phone number can
be set to:
&
Activate a specified output/s with a missed call;
&
Activate either output via a unique, user defined SMS;
&
Be notified by a unique, user defined SMS of either input being
activated
G-SWITCH-22
&
Programming of the module is password protected
&
All users calling or sending an SMS to the module need to
ensure that their Caller Line Identification is activated on their
phone to ensure that the module recognises the user’s
learned-in phone number
&
The module requires a power supply of 10-30V DC, capable of
delivering 500mA peak
&
Both outputs are potential-free, and rated to 30V DC @ 1A
&
Both normally-open and normally-closed contacts are provided
&
Inputs are activated by switching to negative
5. Technical specifications
Supply voltage: 10-30V DC only
Standby current: 100mA
Maximum current: 500mA
Operating temperature: -20°C - +85°C
Output relay rating: 1A @ 30V DC (Output 1 and 2)
Housing material: ABS
Degree of protection: IP55
Physical specifications:
Memory capacity: 300 individual numbers
Memory retention: >200 years
Output pulse time range: 1 ms to 50 days (default 1 sec)
Network required: GSM 900/1800MHz
SIM card required: Yes (activated)
Outputs: Two (potential-free)
Inputs: Two (switch to negative)
Functional specifications:
1. L4 LED ‘Connected to network’ indicator
2. Backup module port
3. Terminals
4. SIM card inside SIM card holder
5. LED Signal strength indicators
6. Antenna
7. IMEI number
8. Defaulting pads
3
6
1
4
5
&
Screwdriver - 3.5mm flat
&
Side cutter
&
Drill
&
Drill bits - 5mm masonry
6mm drill bit
&
Silicone sealant
&
Fasteners and rawl plugs
7. Required tools and equipment
8. Mounting instructions
8.1. Insert screwdriver into slot
and twist.
8A. Remove cover
8B. Mount unit
8.2. Remove the cover and
unclip the circuit board from
the retaining clips.
8.3. Mark position of the unit
against the mounting
surface.
8.4. Using a 5mm masonry bit,
drill a hole into mounting
surface.
8.5. Mount the unit using
suitable fasteners.
Cover
Screwdriver
Slot
Cover
Circuit
board
Mounting position
Rawl plug
Fastener
The housing of the G-SWITCH-22 is weatherproof allowing it to be
mounted externally in order to pick up the maximum GSM network signal.
However, the unit can be mounted inside the housing of the device that it
is operating, such as the gate motor if the GSM network signal is adequate.
(refer to Section 11 – GSM network signal detection) The following section
describes the procedure for mounting the unit to either an internal or
external wall. If mounting the G-SWITCH-22 externally, give consideration
to its location as it should not be within reach of unauthorised persons.
It is strongly advised that a pre-paid SIM card (with limited airtime) is used,
and that it is also password protected. These measures will give you peace
of mind as they will ensure that your SIM card will have little or no value
should it ever get stolen.
Record the IMEI of your G-SWITCH-22 in the blocks provided in Section 6.
In the event that the G-SWITCH-22 is stolen, you can use the IMEI
number to blacklist the G-SWITCH-22.
3. Security consideration
12-24 DC +
12-24 DC –
IN 1
GND
IN 2
N/C1
N/O1
COM1
N/C2
N/O2
COM2
7
8
(Record your IMEI number here)
2
10. Insert activated SIM card
10.2. Raise the SIM card
housing.
10.3. Insert the activated SIM
card and ensure that the
SIM card is correctly
oriented. Align the
cropped corner to be in
the correct position as
per the diagram on the
circuit board.
10.4. Once the SIM card is
inserted correctly in the
SIM card housing, lower
the housing onto the
circuit board. Then slide
the SIM card housing
locking mechanism down
to ensure that the SIM
card housing is securely
locked in place.
10A. Replace cover
10.5. Hook the top of the
edge of the cover onto
the top of the unit.
10.6. Lower the cover and
press securely into
position.
11. GSM network signal detection
When powered up, the
G-SWITCH-22 signal strength
indicator LEDs will light up
indicating the GSM network
signal strength.
The GSM signal strength can be
determined based upon the
combination of the three LEDs
that illuminate:
LED Signal strength
1 1/5
1+2 2/5
2 3/5
2+3 4/5
3 5/5
Cover
LEDs
Locking
mechanism SIM card
housing
SIM card
housing
SIM card
SIM card
housing
SIM card
SIM card
housing
Locking
mechanism
8.6. Use a 6mm drill bit to open
the required cable entry hole.
8.7. Re-insert the circuit board and
ensure that the retaining clips
are holding it in place.
8.8. Fix the cable to the wall using
cable saddle.
8.9. Seal all the holes with silicone
sealant.
8B. Mount unit
(continued)
6mm drill bit
Cable
Cable
saddles
8. Mounting instructions
9B. Example 1 of a typical connection to the
D5-Evo Sliding gate operator
9.5. connected to Trg
and will open
gate fully.
9.6. Output 2 will be
connected to Ped
and will open
the gate to
pedestrian
opening.
9.7. Input 1 will send
an SMS when
the Beam Alarm
is triggered
(gate safety
beams must be
activated and
mapped to
Aux IO).
Output 1 will be
N/C2N/02COM2
12-24 DC + - N/C1N/01COM1
12-24DC +
12-24DC -
In1
GND
N/01
COM1
N/02
COM2
G-SWITCH-22
D5-Evo
controller
The GSM signal strength may be enhanced by repositioning the
antenna. Ideally the antenna should be mounted externally, and away
from any sensitive electrical components.
The rear side of the
antenna has a double-
sided tape backing, which
may be used to affix the
antenna to a desirable
location. Please ensure
that the surface to which
you affix the antenna is
smooth, clean and dry, to
ensure reliable adhesion
The signal strength can be queried by sending the “request
signal strength” command p.xxxx.CO.SS to the module. The
querying phone will receive a reply SMS with a value 5
(strongest) to 1 (weakest) indicating signal strength
10.1. Slide the SIM card
housing’s locking
mechanism up to release
the housing.
Ensure that a SIM card that
goes into the module for
the first time is not PIN
protected
9C. Example 2
N L
Remote Geyser control with feedback
2 Pole
Geyser
Isolator
N L 12 - 24V DC
Power supply
In4007 Diode
12-24V DC
2 Pole
relay
Geyser
220V
2 Pole
contactor
Geyser on
Geyser off
Double-sided
tape
Antenna
9. Wiring Diagrams
9.1. Supply the unit
with 12-24V DC
only.
9.2. The inputs are
potential-free and
must be pulled to
GND/common for
the module to
react.
9.3. Both outputs are
potential-free.
Some applications
might require an
external link
between NEG and
COM.
9.4. Mount the antenna
in a suitable place.
9A. Connections
Power supply
12-24V DC
only
Input 2
Normally-open
contact
Input 1
Normally-open
contact
Relay 1 Output
Relay 2 Output
N/C2N/02
COM2
12-24 DC
+ - N/C1N/01COM1
+
-
This icon denotes variations and other aspects that should be
considered during installation
This icon indicates tips and other information that could be useful
during the installation
2. Important Safety Instructions
1. All installation, repair, and service work to this product must be done by
a suitably qualified person.
2. Do not in any way modify the components of the system.
3. Do not install this product near sensitive electrical components
(e.g. the DOSS sensor inside a CENTSYS operator housing).
4. Do not install the equipment in an explosive atmosphere: the presence
of flammable gas or fumes is a serious danger to safety.
5. Do not leave packing materials (plastic, polystyrene, etc.) within reach
of children as such materials are potential sources of danger.
6. Dispose of all waste products like packaging materials, according to
local regulations.
7. Centurion Systems (Pty) Ltd does not accept any liability caused by
improper use of the product, or for use other than that for which the
automated system was intended.
8. This product was designed and built strictly for the use indicated in this
documentation. Any other use, not expressly indicated here, could
compromise the service life/operation of the product and/or be a
source of danger.
9. Anything not expressly specified in these instructions is not permitted.
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www.centsys.com.au
0.07.B.0014 G-SWITCH-22
Pocket Installation Guide
6Jul2012
G-SWITCH-22 GSM module
installation guide
e
GSM
MONITORING
AND CONTROL

12. Setting up the G-SWITCH-22 commands
Multi-user capability (300 phone numbers)
It is important to note that the memory of the G-SWITCH-22 GSM
module is limited to 300 phone numbers. In other words a maximum of
300 phone numbers can be registered on the system at any one time.
Each phone number can be configured uniquely with respect to inputs
and outputs, as well as activation and notification messages. Each
phone number can be assigned a limited number of uses for each
output.
When the memory limit is reached, trying to add new phone numbers
will not overwrite or affect the existing numbers stored into the
system. It will just not be possible to add the additional numbers.
p.xxxx.AP.08412
34567.OU1.IN2.
”In2 Text“
Adds phone number 0841234567 to the system,
and sets a missed call from this number to trigger
Output 1. It also assigns Input 2 to be monitored.
In the event that Input 2 is triggered, the message
specified in “In2 Text” will be sent to this number.
EP. Editing a phone
Description Parameters
Phone number (up to 14 digits)
OU1 Activates Output 1
DOU1 Deletes Output 1
OU2 Activates Output 2
DOU2 Deletes Output 2
IN1 Activates Input 1
DIN1 Deletes Input 1
IN2 Activates Input 2
DIN2 Deletes Input 2
DIN1S Deletes Input 1 string
DIN2S Deletes Input 2 string
DOU1S Deletes Output 1 string
DOU2S Deletes Output 2 string
Sub-Parameters
Output text string (1-50 characters)
Input text string (1-50 characters)
(Edit phone)
Edit phone
EP
This command allows the functionality of a phone to be edited.
It is useful when a number has been added with the wrong
functionality, or when circumstances have changed
This command allows the functionality of a phone in the system
to be queried. Information for that phone, including what
outputs and inputs are active, text strings and limited use
counters will be sent in a text message to the querying phone
QP. Querying a phone
Description Parameters
Phone number (up to 16 digits)
(Query phone)
Query phone
settings
QP
Examples (Commands have been highlighted for clarity)
Command Query
p.xxxx.QP.08412
34567 Queries phone number 0841234567. Phone
settings are sent via SMS to the querying device.
CO. Configuring the module
This command allows the functionality of the system to be
configured. Outputs can be set up, states of input/outputs
checked, PINs and passwords managed, etc.
Examples (Commands have been highlighted for clarity)
Command Output configuration
p.xxxx.CO.OU1PU
.OU1PT.2000 Sets Output 1 as pulsed, and sets Output 1 pulse
time to 2 seconds (2000 milliseconds).
p.xxxx.CO.OU1LA
.OU2PU.OU2PT.15 Sets Output 1 as latched, sets Output 2 as pulsed,
and sets Output 2 pulse time to 1.5 seconds (1500
milliseconds).
p.xxxx.CO.SS Sends an SMS to the querying phone with a value
of 10 (strongest) to 1 (weakest) for signal strength.
This command allows an airtime voucher to be loaded, or
remaining airtime to be queried
Description Parameters
Load airtime (L)
Query airtime (Q)
Sub-Parameters
Airtime voucher number
(Airtime)
Loads or queries
airtime
AT
Examples (Commands have been highlighted for clarity)
Command Description
p.xxxx.AT.L.1234
567890 Loads airtime voucher number 1234567890 onto
the SIM.
p.xxxx.AT.Q Airtime remaining on the SIM is sent via SMS to
the querying device.
AT. Airtime
13. In a hurry?
15. Command overview
Description Parameters
14. Command structure
Programming commands are sent to the module using a standard
text message (SMS)
The command structure must always take the following form:
p.xxxx.command1.parameter1.parameter2 command2.
parameter1.parameter2, etc.
All commands must start with ‘p.xxxx. Where xxxx is a user
defined four digit password. The default password is 1234.
For security purposes, this should be changed on commissioning.
&
Each command and parameter must be separated by a
period (.)
&
Commands can be concatenated, and must be separated
by a space ( )
&
The maximum message length is limited to 160 characters
&
Commands are not case sensitive
p.xxxx.AP.08412
34567.IN1.
”In1 Text“
Adds phone number 0841234567 to the system,
and assigns Input 1 to be monitored. In the event
that Input 1 is triggered, the message specified in
“In1 Text” will be sent to this number. “In1 Text”
is case conscious – the message sent will exactly
reflect the “In1 Text” specified.
In1 Text must begin and end with double
quotation marks (“). The quotation marks
(“ ”) are only required when programming
– They will not be included in the text
message sent when the input is activated.
A missed call from this number will not
trigger an output.
Phone number(s) (up to 16 digits each).
Output to be activated by a missed call or
sms (OU1/OU2)
Input to be monitored (IN1/IN2)
Sub Parameters
User Limit UL (1 – 65536 activations)
Output text string (1 - 50 characters)
Input text string (1 - 50 characters)
A user limit restricts the number of times a missed call
will activate the unit. Once the user limit is reached, the
phone number will automatically be deleted from the
system
(Add phone)
Add a phone
number to the
system
AP
Phone number (up to 16 digits)
(Delete phone)
Delete a phone
DP
Phone number (up to 16 digits)
OU1 Activates Output 1
DOU1 Deletes Output 1
OU2 Activates Output 2
DOU2 Deletes Output 2
In1 Activates Input 1
DIN1 Deletes Input 1
IN2 Activates Input 2
DIN2 Deletes Input 2
DIN1S Deletes Input 1 string
DIN2S Deletes Input 2 string
DOU1S Deletes Output 1 string
DOU2S Deletes Output 2 string
(Edit phone)
Edit phone
EP
Load airtime (L)
Query airtime (Q)
Sub-Parameters
Airtime voucher number
(Airtime)
Loads or queries
AT
(Query phone)
Query phone
settings Phone number (up to 16 digits)
QP
CO
OU1PU Sets Output 1 as pulsed
OU1LA Sets Output 1 as latched
OU1PT Sets Output 1 pulse time in
milliseconds
OU2PU Sets Output 2 as pulsed
OU2LA Sets Output 2 as latched
OU2PT Sets Output 2 pulse time in
milliseconds
(Configuration)
Configure inputs,
outputs and
system
settings
SS Requests Signal strength
CS Change SIM card PIN number
EP Enable SIM card PIN checking
DP Disable SIM card PIN checking
SP Set SIM PIN in memory only
QF Queries the firmware version
QS Query the module settings
NP New system password
BE Backup EEPROM
RE Restore EEPROM
IO Input/Output mappings
Reset.all Resets all settings on the module
Reset.usr Resets User Data on the module
Reset.con Resets Config. data on the module
Sub-Parameters
Pulse time In milliseconds
New PIN four digits
New password four digits
IO Mapping
p.xxxx.AP.08412
34567.OU2
Adds phone number 0841234567 to the system,
and assigns Output 2 to be activated by a missed
call from this number.
p.xxxx.AP.08412
34567.OU2.
”Ou2 Text“
p.xxxx.AP.08412
34567.OU1.OU2
Adds phone number 0841234567 to the system,
and assigns both Output 1 and Output 2 to be
activated by a missed call from this number.
p.xxxx.AP.08412
34567.08376543
21.OU1
Adds phone numbers 0841234567 and 0837654321
to the system, and assigns Output 1 to be activated
by a missed call from EITHER of these numbers. The
number of phone numbers that can be added in one
command is limited only by the maximum allowed
message length (160 characters).
Adds phone number 0841234567 to the system,
and assigns Output 2 to be activated by sending an
SMS with the message specified in “Ou2 Text” .
“Ou2 Text” is not case sensitive, and MUST
begin and end with double quotation marks
(“). The quotation marks (“ ”)are only
required when programming – They must
not be included when sending the text
message to activate the output.
Examples (Commands have been highlighted for clarity)
Command Description
p.xxxx.AP.08412
34567
Adds phone number 0841234567 to the system and,
since no parameters are specified, by default
assigns Output 1 to be activated by a missed call
from this number. This allows easy addition of new
phones to a basic system.
Description Parameters
Phone number(s) (up to 16 digits each)
Output to be activated by a missed call or sms
(OU1/OU2)
Input to be monitored (IN1/IN2)
Sub-Parameters
User Limit UL (1 – 65536 activations)
Output text string (1-50 characters)
Input text string (1-50 characters)
(Add phone)
Add a phone
number to the
system
AP
p.xxxx.AP.08412
34567.OU1.
UL25.OU2
Adds phone number 0841234567 to the system,
and assigns both Output 1 and Output 2 to be
activated by a missed call from this number.
Output 1 has a limit of 25 uses. After 25 missed
calls (activations), Output 1 will no longer be
activated by a missed call. However, Output 2 will
continue to function indefinitely.
p.xxxx.AP.08412
34567.OU1.
UL25.OU2.
UL100
Adds phone number 0841234567 to the system,
and assigns both Output 1 and Output 2 to be
activated by a missed call from this number. Output
1 has a limit of 25 uses, and Output 2 has a limit of
100 uses. After 25 missed calls (activations),
Output 1 will no longer be activated by a missed
call. However, Output 2 will continue to function for
a further 75 calls. Thereafter, this number will
automatically be deleted from the system.
DP. Deleting a phone
This command allows one or more numbers to be deleted
from the system
Examples (Commands have been highlighted for clarity)
Command Description
p.xxxx.DP.08412
34567 Deletes phone number 0841234567 from the
system
p.xxxx.DP.08412
34567.08376543
21.0827766554
Deletes phone numbers 0841234567, 0837654321
and 0827766554 from the system
Description Parameters
Phone number(s) (up to 16 digits)
(Delete phone)
from the system
DP
Description Parameters
(Configuration)
Configure inputs,
outputs and
system settings
CO
OU1PU Sets Output 1 as pulsed
OU1LA Sets Output 1 as latched
OU1PT Sets Output 1 pulse time in ms
OU2PU Sets Output 2 as pulsed
OU2LA Sets Output 2 as latched
OU2PT Sets Output 2 pulse time in
milliseconds
SS Requests Signal strength
CS Change SIM card PIN number
EP Enable SIM card PIN checking
DP Disable SIM card PIN checking
SP Set SIM PIN in memory only
QF Queries the firmware version
QS Query the module settings
NP New system password
BE Backup EEPROM
RE Restore EEPROM
IO Input/Output mappings
Reset.all Resets all settings on the module
Reset.usr Resets User Data on the module
Reset.con Resets Config. Data on the
module
Sub-Parameters
Pulse time (milliseconds) 1s = 1000ms
New PIN number (four digits)
New password (four digits)
IO Mapping
Command Description
p.xxxx.CO.CS.
yyyy
SIM card PIN number settings
Change the SIM card PIN number. yyyy is the NEW
PIN number. The old PIN number does not have to
be entered.
p.xxxx.CO.EP Enable checking of the SIM PIN number on startup.
p.xxxx.CO.DP Disable checking of the SIM PIN number on startup.
Setting the new SIM PIN number in memory only
(Useful when a new SIM is going to be inserted in
the future. On startup, the module will
automatically try this PIN if the old PIN does not
work). yyyy is the new PIN number. The old PIN
number does not have to be entered.
p.xxxx.CO.SP.
yyyy
To simply add a phone number to the module to trigger Output 1,
default pulse time with a missed call, send the following SMS to the
module: ‘p.xxxx.ap.yyyyyyyyyy,where xxxx is the system password
(default is 1234 ), and yyyyyyyyyy is the phone number you wish to
add’.
For your own security, it is recommended that the default password be changed
and that SIM PIN checking be enabled (see ‘CO. Configuring the module’)
Ensure that a record of your system password is kept in a safe place.
Ensure that a record of the new SIM PIN number is kept in a safe place.
Record system password here
Record new SIM PIN here
four digit password
(Password)
System password
P
p.xxxx.AP.08456
32347.OU1.
UL20."Ou1 text"
Adds phone number 0841234567 to the system,
and assigns Output 1 to be activated sending an
SMS with the message specified in “Ou1 Text”, with
a user limit of 20 uses. After 20 SMSs (activations)
this number will automatically be deleted from the
system.
Adds phone number 0841234567 to the system,
and assigns Output 1 to be activated by a missed
call from this number, with a limit of five uses.
After five missed calls (activations), this number will
automatically be deleted from the system.
p.xxxx.AP.08412
34567.OU1.UL5
The following commands require an optional Memory Backup
Module (Product code PCA12201V1.0). See Section 6 for
location of Backup module port
Command Description
p.xxxx.CO.BE
Backup the entire module memory (EEPROM) onto
a CENTSYS Backup Memory Module.
This includes all user information and module
settings. The Memory Backup Module must be in
place before the command is sent to the module.
After sending the command, a confirmation SMS
will be sent back indicating whether the backup
was successful or not.
p.xxxx.CO.RE
Restore the entire module memory (EEPROM) from
a CENTSYS Backup Memory Module.
This includes all user information and module
settings. The Memory Backup Module must be in
place before the command is sent to the module.
After sending the command, a confirmation SMS
will be sent back indicating whether the restore was
successful or not.
Backing up and restoring the memory
Query controller status/settings
Command Description
p.xxxx.CO.QS
Sends an SMS to the querying phone with the
following information:
&
Current state of the outputs
&
Current state of the inputs
&
Output configuration (Pulsed/Latched)
&
Output pulse times
&
Input-Output mappings
&
IP address and port of host server
Query Firmware version
Command Description
p.xxxx.CO.QF Sends an SMS to the querying phone with the
module firmware version.
Command Description
Clearing memory
p.xxxx.CO.reset.
all
Reset the entire module. All user information is
deleted, and all module settings are restored to
factory default.
p.xxxx.CO.reset.
usr Delete all user information on the module.
Module settings are not affected.
p.xxxx.CO.reset.
con Reset all module settings to factory defaults.
User information is not affected.
Alternative SMS activation of outputs
Even though preconfigured SMS text may have been assigned
to outputs when adding a phone to the system, the outputs on
the module can also be explicitly activated by sending an SMS
to the module, from a valid phone (a valid phone is one for
which a number exists in the system, and for which outputs
have been assigned), with one of the commands below:
&OU1.on;OU1.off;OU2.on or OU2.off
Command Description
OU1.on
Activates Output 1. If OU1 is set as pulsed, the
output will activate for the configured pulse time
If OU1 is set as latched, it will turn on and
remain on.
OU2.off Deactivates Output 2. If OU2 is set to pulsed, the
command will have no effect. If OU2 is set to
latched, and currently on, it will turn off.
Examples
&
You can use the text “me” instead of specifying your own number
when adding, deleting, editing or querying your phone i.e.
p.xxxx.AP.me
&
If you add a ‘space’ and then the text “ACK” to the end of any
command, you’ll receive an SMS back confirming that the
command has been received by the module. For example,
p.xxxx.DP.0841234567 ACK
&
If you make a mistake during the programming via a cell phone,
you will receive an “error” sms to let you know
Tips and tricks
The module must have sufficient airtime credit to send the
SMS
p.xxxx.CO.IO
Mapping inputs to outputs
Allows activation and deactivation of input-output
mappings. If an input is mapped to an output, and
that input is activated, the mapped output will also
activate, responding according to its configuration
settings:
IN1.OU1 : Maps Input 1 to Output 1
IN1.OU2: Maps Input 1 to Output 2
IN2.OU1: Maps Input 2 to Output 1
IN2.OU2: Maps Input 2 to Output 2
DIN1.OU1: Deletes Input 1 to Output 1 mapping
DIN1.OU2: Deletes Input 1 to Output 2 mapping
DIN2.OU1: Deletes Input 2 to Output 1 mapping
DIN2.OU2: Deletes Input 2 to Output 2 mapping
Command Description
p.xxxx.CO.NP.
yyyy yyyy is the new password.
P. Setting a new system password
Reset to factory default settings
In the event that you forget the system password you will need to
reset the module to the factory default settings. To do this, please
follow the steps below:
1. Power down the module.
2. Bridge the following terminals: IN1, IN2 and GND.
3. Short out the defaulting pads by touching across them with the tip
of a screwdriver.
4. Power up the module.
5. Remove the bridges to the terminals as mentioned in point 2 and 3
above, as well as the defaulting pads.
6. The module will now be reset to the factory default settings.
All of the information on the module will be erased
AP. Adding a phone
This command allows new phone numbers to be added to the system.
When adding a new phone, it is possible to specify which outputs are to
be activated by a missed call from the phone, and which inputs will
cause a message to be sent to the phone. The number of times the
phone can be used to activate the system can also be specified.