MUSITEL 52 T User manual

MUSITEL 52 T, 53T & 61E
GSM GATEWAY
SimBox
User Manual
Models: 52T, 53T and 61E
Version: 9.2
Soft 2.4x MUSITEL 52T, 53T & 61E pa
g
e 2
Checklist
Packaging list, please check the contents of your unit:
Item Quantity Notes
GSM Gateway - model corresponding to the order
no., refer to the type label on the GSM Gateway
backside
1
Mains (A.C. power supply) cord 1 1)
Telephone line cord 1
Serial cable 1 4)
Antenna 1
Holder (for fixing to the wall) 1
Rawlplugs 2
Screws 2
Fuse for battery 1 2)
This manual 1
Warranty Certificate 1
Software on floppy or CD-ROM 1 3)
Notes:
1
) versions shipped without mains cord (order no. with different suffix) are
available also.
2)
Only for models with battery back up.
3)
Software enclosed:
•
GSM program
•
SMS program
•
Driver for PC
4)
Not for Musitel 52T

MUSITEL 52T, 53T & 61E page 3
CONTENTS
1. Introduction 5
1.1. PURPOSE 5
1.2. HOW TO SAVE GSM CALL COSTS 5
1.3. OTHER ADVANTAGES AND APPLICATIONS 6
2. Basic installation Instructions 7
2.1. PROPER LOCATION 7
2.2. TELEPHONE LINE CONNECTION 8
2.3. EXTERNAL ANTENNA CONNECTION 10
2.4. SIM CARD SET-UP AND INSTALLATION 10
2.5. POWER SUPPLY CONNECTION 11
2.6. BACK-UP BATTERY CONNECTION 11
2.7. FUNCTIONAL VERIFICATION 13
2.8. LED INDICATORS 17
3. User Manual – description of Basic (Voice) Function 19
3.1. OUTGOING CALL - Musitel 52T + 53T
- gsm gateway on pbx’s co line 19
3.2. OUTGOING CALL - Musitel 61E
- gsm gateway on pbx’s subscriber line 21
3.3. INCOMING CALL - Musitel 52T + 53T
- gsm gateway on pbx’s co line 23
3.4. INCOMING CALL - Musitel 61E
- gsm gateway on pbx’s subscriber line 25
3.5. MORE LOCAL CALLS DURING ONE GSM CONNECTION 27
3.6. AUTOMATIC Dialling ("BABY CALL") 28
3.7. INTELLIGENT INCOMING CALL ROUTING 29
3.8. TELEPHONE LINE TONES, RINGING COURSE 30
3.9. PIN/PUK CODE ENTERING 32
3.10. NOTES 33
3.11. INSTRUCTIONS FOR USE FOR COMMON USERS 35
4. User Manual – Description of Data and SMS Functions 36
4.1. USAGE OF UNIVERSAL INPUTS 36
4.2. USAGE OF UNIVERSAL OUTPUTS 38
4.3. USE OF DATA MODE 41
4.4. PC-BASED SMS RECEIVE/SEND 43
4.5. SECURITY CENTRE 43
MUSITEL 52T, 53T & 61E page 4
5. Installation Instructions for Advanced Users 44
5.1. DESCRIPTION FOR GSM GATEWAYS 44
5.3. DESCRIPTION OF GSM GATEWAY PCB 47
5.4. CONNECTION OF UNIVERSAL INPUTS AND OUTPUTS 52
5.5. BACK-UP BATTERY, REPLACEMENT 54
5.6. FUSE EXCHANGE 55
5.7. LITHIUM BATTERY EXCHANGE 56
5.8. MICROCOMPUTER EXCHANGE 56
6. Programming 57
6.1. HOW TO PROGRAM 57
6.2. BEFORE PROGRAMMING 57
6.3. HANDSET-BASED PROGRAMMING 58
6.4. PC - BASED PROGRAMMING VIA SERIAL INTERFACE 62
6.5. REMOTE PROGRAMMING BY PC 63
7. Parameter Tables 70
7.1. BASIC PARAMETERS 70
7.2. PBX’S Co LINE - Musitel 52T and 53T model 76
7.3. PBX SUBSCRIBER LINE - Musitel 61E model 79
7.4. UNIVERSAL INPUT AND OUTPUT PARAMETERS 84
7.5. CALL SORTING TABLE 89
7.6. INTELLIGENT INCOMING CALL ROUTING TABLE 96
7.7. ACOUSTIC FAILURE SIGNALLING PARAMETERS 98
7.8. OPERATION MONITORING PARAMETERS 99
7.9. SERVICE PARAMETERS 101
8. Miscellaneous 103
8.1. TELEPHONE COST SAVING TIPS 103
8.2. TROUBLE SHOOTING 104
8.3. LIST OF ABBREVIATIONS 104
9. Technical Parameters 106

MUSITEL 52T, 53T & 61E page 5
1. Introduction
1.1. Purpose
• When connected to a PBX, the
MUSITEL
®
- GSM Gateway allows its
users to make direct calls via the GSM network. It can work with a
telephone set, coin-operated automatic machines, etc.
• The voice mode, i.e. an outgoing or incoming call, is the basic function of
the Musitel GSM Gateway.
The Musitel is equipped with all functions necessary for this purpose and
offers ease of use in this mode.
• Moreover, the Musitel Gateway provides (in connection with a PC) data
mode and SMS receive/send mode too. With SMS messages, universal
inputs and outputs can be used also.
These additional functions increase the utility value of the product.
• You need no additional equipment (mains adapter, external GSM
telephone) to run the Musitel GSM gateway. The installation is so easy
that even a non-professional can install it.
All programmable parameters are set at optimum values by default.
Once you have connected the telephone line, antenna, power supply and
your SIM card, you can start making calls without hesitation.
1.2. How to Save GSM Call Costs
• By connecting a Musitel GSM Gateway to your PBX you can make direct
calls into a mobile network.
This saves PSTN – GSM connection costs. Mobile telephone calls
made by your colleagues from outside to your headquarters will be
cheaper too.
• With the GSM Gateway you can use the most convenient tariff rate of
your GSM operator, because calls of all your GSM Gateway users will
be billed together.
• If you use an answering and recording machine – a GSM service, you
may pay for retrieving messages. If you connect an answering machine
of your own to the GSM Gateway, you pay nothing for the retrieval.
• With the Musitel GSM Gateway you can eliminate selected numbers.
You won’t pay for a call that is disabled.
• You can also get a listing of the time and length of selected calls to find
easily why your bill is higher than it should be.
MUSITEL 52T, 53T & 61E page 6
1.3. Other Advantages and Applications
• You can establish a telephone connection even where there are no
fixed telephone lines available (exhibitions, fairs, conferences,
chalets...).
• You are not exposed to the high-frequency electromagnetic field as with
a mobile telephone.
• You can also attach a coin-telephone to the Musitel, as it is able to send
tariff pulses.
You can assess the price for call connections yourself (with profit).

MUSITEL 52T, 53T & 61E page 7
2. Basic Installation Instructions
This chapter describes the basic connection of the Musitel - GSM Gateway
that can be made in a few minutes.
All you have to do is to connect an antenna, the power supply cable and
telephone line, insert your SIM card and the GSM Gateway is ready to work.
2.1. Proper Location
• The Musitel
®- GSM Gateway is a transmitter in principle.
You must comply with the local regulations and laws in your country
pertinent to usage of mobile phones and transmitters!
• The Musitel - GSM Gateway is designed for vertical mounting.
For the required working position see Fig.1.
• The Musitel may be operated in a position other than vertical (on a desk,
e.g.) for a short time only – for quick maintenance testing, for example.
• For the acceptable range of operating temperature and humidity refer to
the “Technical Parameters”.
• The Musitel 52T, 53T and 61E may not be operated at places exposed
to direct solar or heat radiation.
• Exceeding the acceptable operating
temperature does not have an
immediate impact on the Musitel
function, but may result in
accelerated ageing (of batteries
in particular!) and lower reliability.
• The Musitel is designed for
indoor use. It must not be exposed to
rain, water, condensed moisture,
fog, etc.
• The Musitel must not be exposed to
corrosive gas, fumes of acids or
solvents, etc., or corrosive
liquids, during cover cleaning,
for example.
• The Musitel is not intended for use
in high vibration locations such as
means of transport, machine rooms, etc.
• The Musitel should be located
with respect to the GSM signal quality.
• A free space should be left over and
under the Musitel - GSM Gateway for
cables and flowing air that removes
heat produced during the operation.
Fi
g
. 1.: Musitel Working Position
MUSITEL 52T, 53T & 61E page 8
2.2. Telephone Line Connection
2.2.1. MUSITEL 52T and 53T - Connection to PBX
models for external line of PBX
Connect the
Musitel 5xT to a free external (C.O.) line of your PBX (the
Musitel 53T models for external (C.O.) and Musitel 61E for local line
(extension) are not interchangeable!).
With a CO line, define a different access number for this line than for the
remaining CO lines during the PBX programming.
Musitel 53T and 61E are equipped with the Least Cost Routing (LCR)
software, which allows you to use the same access number for all CO lines.
Fi
g
. 2.: Connection to PBX
C.O. line including callmaking
example
Access to Musitel 5xT, connected
this way (to external line of PBX)
must be provided by a prefix,
different to the prefix for C.O.
line access.
Another solution is a LCR
(Least Cost Router) inside the
PBX - software that is able to choose MUSITEL 5xT
right direction for every call automatically.
2.2.2. Musitel 52Tand 53T - Connection to Telephone Set (Answering
Machine, Coin- Operated Automatic Machine) - models for external line of
PBX
You can connect any telephone set or some other terminal equipment to the
Musitel 52T and 53T; see Fig. 3.
Note: If you connect a coin-operated phone, be sure to program the
transmission of tariff pulses and pseudo tariff metering properly as well as to
bar calls with unpredictable tariff rates!
Fi
g
. 3.: Optional
Connection of More
Terminal Equipment
MUSITEL 53T

MUSITEL 52T, 53T & 61E page 9
2.2.3. MUSITEL 61E- Connection to PBX
models for local line of PBX (extension)
Connect the Musitel 61E to an unused local line of your PBX (extension).
Attention! The GSM Gateway models for external (C.O.) and local line
(extension) are not interchangeable!
Attention! It is highly recommended to set your PBX to disable outgoing
calls from this extension to C.O. lines, and to disable access to this
extension from C.O. lines.
This way you avoid an abuse of GSM gateway from "outside" (making
expensive long-distance calls on your bill).
MUSITEL 61E
Fig. 4.: Connection to PBX local line (extension) including call-making example
MUSITEL 52T, 53T & 61E page 10
2.3. External Antenna Connection
Connect an antenna or an external antenna cable into the FME connector.
The antenna location should have a good GSM signal. The antenna should
be in the vertical position. For antenna and cable parameters refer to the
“
Technical Parameters
”. Tighten an antenna connector gently by hand;
do not use any tools!
2.4. SIM Card Set-up and Installation
2.4.1. Operator / SIM Card Selection
To perform this GSM Gateway function you need a SIM card of a GSM
network operator, using the 900 MHz or 1800 MHz band (depending on
GSM gateway model). The
MUSITEL
-GSM Gateway works with 3V SIM
cards. All SIM cards except for the oldest ones meet this condition. If you
are not sure, ask your GSM operator about voltage of your old SIM card.
If your SIM card is new or you are going to buy a new one, you need not
worry – your SIM card will be O.K.
2.4.2. PIN Entering Blocking (Optionally)
The Musitel provides automatic PIN entering by default. You can disable
PIN entering on your SIM card (using a mobile telephone into which you
insert your SIM card for this purpose).
If you do disable, you need not worry as to whether there is a PIN code
stored in your Musitel memory. If you enable PIN entering, your GSM
Gateway will require a PIN code after the first power-on and if you enter the
PIN correctly, the GSM Gateway will store it in its memory and enter
automatically in the future.
2.4.3. GSM Network Service Setting (Answering Machine, Call
Forwarding)
Before the SIM card installation decide whether you will use the incoming
call forwarding service provided by GSM networks (call forwarding in the
event of busy line, absence, unavailability...). However, it is more
convenient to disable all call forwarding modes (the GSM operator’s
answering machine, e.g.) and use an answering and recording machine of
your own. If you have more Musitel’s with your PBX, you can forward calls
when one GSM Gateway is busy, etc.

MUSITEL 52T, 53T & 61E page 11
2.4.4. Roaming Parameters Setting (Calling via Foreign GSM Networks)
The GSM Gateway disables roaming by default. It is usually convenient
because most people do not travel with the Musitel and there is a risk with
roaming in foreign countries that, due to a failure in the local GSM network,
you might get registered in another network and pay much more for your
calls. To enable roaming and set network preferences, complete the list of
GSM networks to be preferred using your mobile telephone and then enable
roaming while programming the GSM Gateway.
The registration of the GSM Gateway in a foreign GSM network is signalled
by a special dial tone (refer to the list of tones) and you have to dial
numbers including international prefixes that can be easily barred (refer to
Programming, Call Sorting Table
).
2.4.5. SIM Card Insertion in GSM Gateway
Some models have a cover without hole for SIM exchange. In this case,
release the two screws and remove the upper cover face (see Fig. 6).
To install the SIM card press the yellow button on the SIM holder using a
suitable tool (e.g. scissor) to make the drawer slide out. Remove the drawer,
insert the SIM card in it, slide the drawer back and click into position.
Then replace the cover face and tighten the screws, if removed.
This protects the GSM Gateway circuits against dust and damage!
2.5. Power Supply Connection
2.5.1. For all GSM gateways models
Make sure that the voltage in your mains corresponds with the data on
the product label.
Make sure that the antenna has been connected. If you connect a
power supply to the equipment without the antenna, you might
cause damage to the GSM module transmitter.
Connect your power cord. After a while, the green indicator “AC Supply
O.K.” should go on.
2.6. Back-Up Battery Connection
This paragraph applies to models Musitel 53T and Musitel 61E.
For these models, a back-up battery with cover can be ordered - ordering
No. 910121090 (E).
This is a maintenance-free lead battery pack 12V / 1,2Ah with metallic
cover, whose design matches the GSM Gateway. This cover includes the
accessories for wall mounting.
MUSITEL 52T, 53T & 61E page 12
Battery installation
While placing the battery pack, avoid exposing it to high temperature if not
necessary and mount it to the wall, if possible. Mounting method, holder etc.
is the same, as for GSM gateway.
Plug a cable into a fitting connector on GSM gateway. Check a fuse in
holder and insert it, if the holder is empty. Switch on.
Notes:

Circuits in Musitel are designed to handle 12V / 1,2Ah maintenance-free
lead battery.
Also a different lead battery with a nominal voltage 12V and a capacity of
1 to 2Ah or a set of 10 NiCd or NiMH cells of the capacity from 600 to
1,600mAh can be used too. Of course, a manufacturer cannot guarantee
a proper charging, if the battery parameters are too different.
Especially, a battery of a higher capacity may not reach an end-of-charge
voltage. It may cause a permanent charging, and it may damage the
battery! Such battery must be charged externally.
In this case, the charging function has to be disabled by software – see
chapter 7.1, parameter 170. An external 12V power can be applied too.

The accumulator is charged and checked automatically, and the GSM
Gateway indicates the charging and emergency statuses
(disconnected,
short-circuit, or fully discharged battery)
and stores these events in the
service buffer. If lamp "charge" is dark (strictly speaking, it flashes
shortly with a long period, done by conservation charging), the
accumulator is fully charged.
End of charging, discharging and all failures, such as disconnected
accumulator or short circuit, are stored in service buffer.

See chapter 5.5 for details, as well as for standard battery replacement.

MUSITEL 52T, 53T & 61E page 13
2.7. Functional verification
Recommendation: check GSM gateway functionality prior to connecting it to
your PBX and programming.
2.7.1. MUSITEL 53T - for GSM gateways for external (C.O.) line of PBX
If you have a GSM gateway model MUSITEL 53T for external (C.O.) lines
on a PBX, follow these instructions:
1. Connect GSM gateway to previously checked telephone set.
Verify that this telephone is switched to DTMF and its ringer is ON.
If is better to check a SIM card too, using a mobile phone. It is not
necessary to fix GSM gateway to a wall for testing – it can lie on flat
surface as well.
Excepting this, follow chapters 2.2 to 2.5 to connect all needed.
2. If the inserted SIM card requires a PIN, the red lamp “Enter PIN” will light
up. In this case, pick up the handset of connected a phone.
You will hear a PIN tone .
Enter PIN as described in chapter 3.9.2 and hang up, the red “Enter PIN”
lamp will go out.
3. The GSM gateway will register itself into the GSM network. First, the red
“No GSM network” lamp must go out. After a moment, the green “GSM
ready” lamp will light up.
4. Pick up the phone; you will hear the dialling tone and the green “Line
ready” lamp will start blinking. If it doesn’t, the phone or its connection is
bad.
5. Now check for signal quality. Enter programming mode according to
chapter 6.3.2, skipping step No. 1 (this applies only in the case of
connection to a PBX). Indication of GSM signal quality will be turned on
automatically.
As more lamps are lit, signal quality is better.
If at least one green lamp is lit up, signal quality is excellent.
Try to find a good place for the antenna.
Keep the antenna vertical and move it slowly – signal quality information
is updated every three seconds.
Remember that a movement as small as 10 cm may have a
considerable effect on signal quality, as well as a position close to your
body.
The best way is to step aside after each relocating of antenna.
Hang up after positioning the antenna; do not program anything!
6. Make an outgoing call. Call your colleagues mobile e.g. and verify that
you hear each other well. In the case of a completely new pre-paid SIM
card, one outgoing call is necessary for SIM card activation.
Until it is activated an incoming call cannot be received! Make an
incoming call now.
MUSITEL 52T, 53T & 61E page 14
Call the Musitel 53T; the phone should ring.
7. The Musitel 53T is now checked. You can now connect it to a vacant
C.O. line in the PBX.
After connection is completed, check both incoming and outgoing calls
again.
This may, of course, necessitate some programming or settings changes
of the PBX.
If everything is O.K., you can go to programming, if it is required - see
chapter 6.

MUSITEL 52T, 53T & 61E page 15
2.7.2. MUSITEL 61E - for GSM gateways for local line (extension)
of PBX
If you have a GSM gateway model for a local line (extension) in the PBX,
follow these instructions:
1. Use an unused, previously checked local line of PBX.
Special lines, such as lines for so called "key phones", or ISDN lines
cannot be used! It is recommended that the PBX will give a busy or
permanent tone after call finishing (after hooking up on one side,
the other side is advised by this tone).
2. Use a previously checked telephone handset, switched to DTMF and
connected to another extension of the PBX. It is best to use a cordless
phone; this allows you to closely observe the lamps on the Musitel 61E.
3. Disconnect the phone, which was previously used to check the unused
line. Using the same cable connect the Musitel 61E.
It is recommended that you check the SIM card too, using a mobile
phone. Again it is not necessary to fix the Musitel to the wall for testing
– it may be placed on a flat surface if necessary.
After this, follow chapters 2.2 to 2.5 to make all required connections.
4. If inserted SIM card requires a PIN, red “Enter PIN” lamp will light up.
In this case, pick up the phone connected to another extension (e.g.
cordless phone) and call GSM gateway extension. You will hear a
PIN tone . Enter pin as described in chapter 3.9.2 and hang up. Red
“Enter PIN” lamp will go out.
5. The Musitel 61E will register itself into the GSM network.
First, red “No GSM network” lamp must go out (if present).
After few seconds the green “GSM ready” lamp will light up.
6. Pick up the phone connected to another extension (e.g. cordless phone)
and call Musitel 61E extension; you will hear dialling tone and green
lamp “Line ready” will start blinking. If not, and you hear ringing only, the
phone or its connection is bad or you called an invalid extension number.
7. Now check signal quality. Enter programming mode according to chapter
6.3.2. Indication of GSM signal quality will be turned on automatically.
As more lamps light up, signal quality is better.
If at least one green lamp is lit, signal quality is excellent.
Try to find a good place for antenna. Keep the antenna vertical and
move it slowly – signal quality information is updated every three
seconds.
Remember that a movement as small as 10 cm may have a
considerable effect to signal quality, as well as a position close to your
body. The best way is to step aside after each relocating of the
antenna. Next, if PBX doesn't support DTMF dialling, program
parameter 114; switchboard operator number, i.e. extension to be called
in case of incoming call and set parameter 311 - type of dialling, to pulse
dialling. Programming can be done by phone - see chapter 6.3 , or by
MUSITEL 52T, 53T & 61E page 16
PC. It is not possible to check an incoming call without this setting!
8. Hang up after placing antenna; do not program anything!
9. Make an outgoing call. Call your colleagues mobile e.g. through the
Musitel 61E and ensure that you hear well each other.
In the case of a completely new pre-paid SIM card, one outgoing call is
necessary for SIM card activation.
Until the SIM is activated, an incoming call cannot be made! Check an
incoming call now. Call the GSM gateway.
If PBX doesn't support DTMF dialling, line selected by parameter 114 will
be ringing.
Otherwise, you will hear the dialling tone of your PBX.
Dial the number of an extension; the phone will ring.
10. The Musitel 61E is now checked.
If necessary you can go to programming now - see chapter 6.

MUSITEL 52T, 53T & 61E page 17
2.8. LED Indicators
2.8.1. Table – Basic LED Functions.
Note: Three LED's destined for battery status indication (Battery charge,
Battery supply, Battery low) are unused in models without battery backup.
MUSITEL 52T, 53T & 61E page 18
2.8.2. Signal Intensity Indication
On models MUSITEL 53T and MUSITEL 61E the bottom group of nine
LEDs is used for indicating the GSM signal level.
Using the “GSM Signal Level Indication” (refer to
Programming, Basic
Parameters
) you enable the indicating mode where the Musitel displays the
signal intensity for 2 seconds every 10 seconds.
In the meantime, the
LED's
indicate all statuses normally.
When the GSM Gateway is in the programming mode, the LEDs indicate the
signal intensity continuously and the information is updated every three
seconds. This mode is suitable for searching for the ideal antenna position
during installation.
2.8.3. LED indicators
This description is applicable to 19" models (on the left) and models Musitel
53T (on the right) (501100E and 501105E).

MUSITEL 52T, 53T & 61E page 19
3. User Manual – Description of Basic (Voice) Function
Users mostly use their PBXs and MUSITEL intuitively, without reading any
instructions, or follow very simple instructions provided by an authorized
person. The following functional description is therefore intended for
technicians, who follow the instructions (depending on the PBX set-up) and
solve any operational problems.
3.1. Outgoing Calls - MUSITEL 52T and 53T
GSM Gateway on PBX’s CO line
3.1.1. Picking Up the Line
The PBX picks up a line the moment a subscriber picks up his or her
handset and dials a number that is interpreted by the PBX as the
“MUSITEL Access code“.
This code depends on the PBX type and set-up.
Some PBXs accept the GSM prefix as this code.
Then, the user need have no worry that the call is made via the Musitel.
Note: If the Musitel 5xT is busy, the PBX can either give the caller the
busy tone or choose another connection (PSTN, or there may be more
GSM Gateways with one PBX).
3.1.2. Musitel 52T and 53T - GSM Gateway Ready Signalling
The Musitel 5xT registers the off-hook (current inflow) immediately and
then, if everything is O.K., starts sending its usual dialling tone .
Now the subscriber can dial the number.
Note: If there is no GSM signal, no SIM card has been inserted, no PIN
code has been entered, or if there is another problem, the PBX transmits
a special tone (see below – “Telephone Line Tones“).
3.1.3. Dialling Receive
The Musitel 5xT is ready to receive pulse or tone dialling (according to
the set-up). As soon as the subscriber starts dialling a number, the
Musitel mutes the dialling tone (as with public telephone exchanges).
The user must dial digits in no more than 6 second intervals; otherwise
the number is regarded as complete and sent to the GSM network (this
timeout is programmable).
Note: Some PBXs analyse the whole number first and then transmit the
dialling into the CO line (Musitel). Here, the signalling type and the
timeout depend on the PBX set-up!
3.1.4. Dialling End Recognition
The Musitel 5xT itself can recognize the end of some numbers according
to their length.
MUSITEL 52T, 53T & 61E page 20
Moreover, you can set your Musitel in such a way that the Musitel 5xT
accepts the ‘ L ‘ or ‘#‘ (for tone dialling only) symbols as the end of
dialling.
Otherwise, it waits 6 seconds after the subscriber stops dialling (the
timeout is programmable).
Then, the subscriber can hear a short tone signalling the dialling end and
the Musitel transmits the received number into the GSM network.
If the caller goes on dialling, the Musitel GSM Gateway will not accept
the extra digits!
3.1.5. Connection Establishing
In this moment, Musitel is making a connection, and it takes typically 8
seconds.
During this time, the subscriber hears a special "call progress" tone
(differs by GSM gateway model and version of software). Next, the
subscriber usually hears the ringing tone or another signal transmitted by
the GSM network. The connection, however, is not established and paid
for until the called party answers the phone.
The GSM network signals this moment and the Musitel 5xT can pass the
information to the PBX. If this type of signalling is used (exceptionally),
the calling party can hear a click in the earphone.
3.1.6. Call
During outgoing calls, the Musitel 5xT is computing the cost (pseudo
tariff metering) and it can send tariff pulses. A call may be terminated
forcibly if the GSM signal gets lost, for example, or in similar situations.
3.1.7. Connection Termination (End)
If the caller is the first to hang up, the Musitel registers the on-hook
immediately (the current flow stops) and terminates the connection.
If the called party is the first to hang up, the Musitel 52T and 53T gets
the information from the GSM network and terminates the connection.
The Musitel can pass the information to the PBX.
The calling party gets the busy tone (or another type depending on the
set-up).
Note: With some calls, the called party‘s on-hook information is
considerably delayed by GSM network (30s, e.g.). The subscriber
usually registers the on-hook earlier, hangs up, and the Musitel 5xT
terminates the connection immediately.
3.1.8. Subscriber’s Disconnection (Power Down)
If a subscriber blocks the Musitel by seizing the line without dialling a
number, or fails to hang up after the call, he or she will get the busy tone
first and then is disconnected (Power Down status).