Kuhnt AS55 Series User manual

AS55X Series
SERVICE MANUAL

SERVICE MANUAL AS55X
55Xseries_manual_V3.22 (18-08-15) www.kuhnt.com 1
Index of content
1 General functions............................................................................................................................ 7
1.1 Fax via GSM ............................................................................................................................. 7
1.2 Callback.................................................................................................................................... 7
1.3 Callback termination ............................................................................................................... 8
1.4 Short message callback request.............................................................................................. 8
1.5 GSM channel groups ............................................................................................................... 9
1.6 VPN.......................................................................................................................................... 9
1.7 Internet.................................................................................................................................. 10
1.8 PassThrough .......................................................................................................................... 10
1.9 SimSwitch .............................................................................................................................. 11
1.10 Telnet..................................................................................................................................... 11
1.11 SMS Server............................................................................................................................. 11
1.12 GSM-PBX................................................................................................................................ 12
1.13 SNMP..................................................................................................................................... 12
1.14 PassThrough backup mode ................................................................................................... 13
1.15 ProviderSimSwitch................................................................................................................. 13
1.16 DTMF Codes (WLL550 Pro).................................................................................................... 14
2 Technical Features......................................................................................................................... 17
2.1 AS551 Master (PRI/VoIP)....................................................................................................... 17
2.2 AS551/4V BRI......................................................................................................................... 19
2.3 AS551/2V BRI......................................................................................................................... 21
2.4 AS551 Slave ........................................................................................................................... 23
2.5 AS550 BRI/VoIP...................................................................................................................... 25
2.6 WLL 550 Pro (wireless local loop).......................................................................................... 27
3 Exterior view / Connectors............................................................................................................ 28
3.1 AS 551 Master (PRI/VoIP)...................................................................................................... 28
3.2 AS 551 / 4V BRI...................................................................................................................... 29
3.3 AS 551 / 2V BRI...................................................................................................................... 30
3.4 AS 551 Slave .......................................................................................................................... 31
3.5 AS550 BRI/VoIP...................................................................................................................... 32
3.6 WLL550 Pro (wireless local loop) .......................................................................................... 33
3.7 LED status .............................................................................................................................. 34
3.8 RESET button......................................................................................................................... 37

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4 Service Software............................................................................................................................ 38
4.1 Access type............................................................................................................................ 40
4.1.1 USB ................................................................................................................................ 40
4.1.2 GSM ............................................................................................................................... 40
4.1.3 LAN ................................................................................................................................ 41
4.1.4 Demo ............................................................................................................................. 41
4.1.5 Reverse IP access........................................................................................................... 41
4.2 Import / Export function ....................................................................................................... 42
5 Configuration................................................................................................................................. 43
5.1 General.................................................................................................................................. 43
5.1.1 Tones and announcements ........................................................................................... 43
5.1.2 Volume levels ................................................................................................................ 46
5.2 LAN settings........................................................................................................................... 47
5.2.1 LAN interface Mode....................................................................................................... 47
5.2.2 Advanced network configuration.................................................................................. 48
5.3 ISDN PRI settings ................................................................................................................... 50
5.3.1 Main interface settings.................................................................................................. 50
5.3.2 Main interface protocol................................................................................................. 51
5.3.3 Synchronisation interface (ISDN AUX)........................................................................... 53
5.4 ISDN BRI settings ................................................................................................................... 54
5.4.1 Interface settings........................................................................................................... 54
5.4.2 Protocol options ............................................................................................................ 55
5.5 POTS (FXO) settings............................................................................................................... 58
5.5.1 Interface settings........................................................................................................... 58
5.5.2 Fax settings.................................................................................................................... 59
5.5.3 CLIR with FAX calls......................................................................................................... 59
5.6 ISDN access............................................................................................................................ 60
5.6.1 General .......................................................................................................................... 60
5.6.2 MSN-GSM link list.......................................................................................................... 62
5.6.3 Charge............................................................................................................................ 62
5.6.4 Causes............................................................................................................................ 63
5.7 SIP access............................................................................................................................... 66
5.7.1 General .......................................................................................................................... 66
5.7.2 Extended (expert mode)................................................................................................ 69
5.7.3 Names and passwords................................................................................................... 72

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5.7.4 Authorized user list........................................................................................................ 74
5.7.5 Responses...................................................................................................................... 75
5.7.6 DTMF processing ........................................................................................................... 78
5.7.7 Codecs ........................................................................................................................... 79
5.8 Wired access.......................................................................................................................... 80
5.8.1 Country specific settings................................................................................................ 80
5.8.2 Global call-setup............................................................................................................ 81
5.8.3 Individual call-setup....................................................................................................... 83
5.8.4 Short PBX Domain number list ...................................................................................... 85
5.8.5 Short message callback request.................................................................................... 86
5.9 GSM settings.......................................................................................................................... 88
5.9.1 General .......................................................................................................................... 88
5.9.2 GSM channels................................................................................................................ 90
5.9.3 GSM groups ................................................................................................................... 92
5.10 GSM access............................................................................................................................ 93
5.10.1 General .......................................................................................................................... 93
5.10.2 By GSM channel............................................................................................................. 94
5.10.3 By GSM number............................................................................................................. 97
5.10.4 Internet........................................................................................................................ 100
5.11 Extended features ............................................................................................................... 101
5.11.1 PassThrough ................................................................................................................ 101
5.11.2 SimSwitch .................................................................................................................... 104
5.11.3 Telnet........................................................................................................................... 107
5.11.4 SMS server................................................................................................................... 108
5.11.5 GSM-PBX...................................................................................................................... 109
5.11.6 SNMP........................................................................................................................... 116
5.11.7 PassThrough backup mode ......................................................................................... 118
5.11.8 ProviderSimSwitch....................................................................................................... 118
5.11.9 Fax extension............................................................................................................... 118
5.12 Special settings.................................................................................................................... 119
5.12.1 Timers.......................................................................................................................... 120
5.12.2 Unnamed bits .............................................................................................................. 123
5.12.3 Unnamed bytes ........................................................................................................... 129
5.12.4 Unnamed words.......................................................................................................... 135
5.12.5 Unnamed long words .................................................................................................. 136

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5.13 Test licences ........................................................................................................................ 137
6 Installation................................................................................................................................... 138
6.1 Set SIM PIN.......................................................................................................................... 138
6.2 Set password local access.................................................................................................... 138
6.3 Set password remote / LAN access ..................................................................................... 138
6.4 Set name of device .............................................................................................................. 139
6.5 Download firmware............................................................................................................. 139
6.6 Download announcement file............................................................................................. 139
6.7 Enter upgrade code............................................................................................................. 139
7 Services........................................................................................................................................ 140
7.1 Trace.................................................................................................................................... 140
7.2 View GSM channel states.................................................................................................... 142
7.3 Control GSM channel........................................................................................................... 143
7.4 View number management................................................................................................. 143
7.5 View call setup list............................................................................................................... 143
7.6 View ARP table .................................................................................................................... 143
7.7 View LAN status................................................................................................................... 144
7.8 View SIP status .................................................................................................................... 144
7.9 View SIP registered user list ................................................................................................ 144
7.10 View statistics...................................................................................................................... 144
7.11 Restarts................................................................................................................................ 145
7.12 System clock / calendar....................................................................................................... 145
7.13 View SimSwitch status......................................................................................................... 145
7.14 View device data ................................................................................................................. 146
7.15 View extended features ...................................................................................................... 146
7.16 View test licenses ................................................................................................................ 146
7.17 Short Message Control........................................................................................................ 146
8 Release Notes.............................................................................................................................. 148
8.1 Release 3.0 .......................................................................................................................... 148
8.1.1 New and improved features........................................................................................ 148
8.1.2 Problem solution ......................................................................................................... 148
8.2 Release 3.01 ........................................................................................................................ 148
8.2.1 New and improved features........................................................................................ 148
8.2.2 Problem solution ......................................................................................................... 149
8.3 Release 3.03 ........................................................................................................................ 149

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8.3.1 New and improved features........................................................................................ 149
8.3.2 Problem solution ......................................................................................................... 150
8.4 Release 3.04 ........................................................................................................................ 151
8.4.1 New and improved features........................................................................................ 151
8.4.2 Problem solution ......................................................................................................... 152
8.5 Release 3.05 ........................................................................................................................ 152
8.5.1 New and improved features........................................................................................ 152
8.5.2 Problem solution ......................................................................................................... 153
8.6 Release 3.10 ........................................................................................................................ 153
8.6.1 New and improved features........................................................................................ 153
8.7 Release 3.11 ........................................................................................................................ 154
8.7.1 New and improved features........................................................................................ 154
8.7.2 Problem solution ......................................................................................................... 155
8.8 Release 3.12 ........................................................................................................................ 155
8.8.1 New and improved features........................................................................................ 155
8.8.2 Problem solution ......................................................................................................... 157
8.9 Release 3.13 ........................................................................................................................ 157
8.9.1 New and improved features........................................................................................ 157
8.9.2 Problem solution ......................................................................................................... 158
8.10 Release 3.14 ........................................................................................................................ 159
8.10.1 New and improved features........................................................................................ 159
8.10.2 Problem solution ......................................................................................................... 159
8.11 Release 3.15 ........................................................................................................................ 159
8.11.1 New and improved features........................................................................................ 159
8.11.2 Problem solution ......................................................................................................... 160
8.12 Release 3.16 ........................................................................................................................ 161
8.12.1 New and improved features........................................................................................ 161
8.12.2 Problem solution ......................................................................................................... 162
8.13 Release 3.17 ........................................................................................................................ 164
8.13.1 New and improved features........................................................................................ 164
8.13.2 Problem solution ......................................................................................................... 165
8.14 Release 3.19 ........................................................................................................................ 165
8.14.1 New and improved features........................................................................................ 165
8.14.2 Problem solution ......................................................................................................... 165
8.15 Release 3.20 ........................................................................................................................ 166

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8.15.1 New and improved features........................................................................................ 166
8.15.2 Problem solution ......................................................................................................... 167
8.16 Release 3.21 ........................................................................................................................ 168
8.16.1 New and improved features........................................................................................ 168
8.16.2 Problem solution ......................................................................................................... 169
8.17 Release 3.22 ........................................................................................................................ 169
8.17.1 New and improved features........................................................................................ 169
8.17.2 Problem solution ......................................................................................................... 170

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1General functions
1.1 Fax via GSM
It is possible to send and receive faxes over the GSM mobile phone network using a custom
G3-fax machine. You can use the WLL550 Pro gateway with integrated FXO or any
AS55x/WLL550 VoIP gateway with an analog telephone adapter via a dedicated SIP-channel.
Normally fax transmissions over the GSM network are critical because the handshake is not
optimized fir it. For better results the WLL550 Pro buffers the transmission process and splits
it into two phases. First the fax document will be submitted from the sending machine to the
WLL550 Pro's memory and then time-delayed from the WLL550 Pro memory to the receiving
fax station. The WLL550 Pro will try up to three attempts to submit a fax. During this time
the channel LED is flashing continuously and no further call is possible via this channel.
However a fax transmission can fail for some reason and by splitting the transmission it
might happen that the first phase of the transmission is successful but the second phase
fails. To ensure that the sender gets information about the unsuccessful transmission the
WLL550 Pro can generate a receipt for all successful and failed fax transmissions via a
response fax.
For using the fax service a SIM card with activated GSM-fax service is mandatory. Ususally
you will get a separate fax number from your service provider (also called multi-numbering).
All incoming fax calls will be forwarded automatically to the analogue fax port or the SIP fax-
channel. Outgoing faxes will be forwarded via a GSM-channel (UMTS and LTE do not support
the GSM fax service).
For programming instructions see 5.5.
1.2 Callback
Due to the restrictions of displaying the CLIP within GSM networks ( ‘CLIP -no screening’ is
not available and only a GSM number can be transmitted) a called party does not know
which PBX subscriber is calling via the AS55X or who has initiate the call-setup. The called
subscriber however, cannot reach the call initiator for a call back, because all subscribers of
the PBX could have initiated this call. For this purpose the AS55X can record calls or call
setup data.
All call-setups could be saved, so the AS55X can backtrack every call setup’s origin. The
called party initiates a call to the transmitted CLIP number (one GSM number of the AS55X)
and by using of the call-setup list the callback can be routed the original subscriber of the
PABX. Please consider that only the last call to one destination can be saved. A previous
existing call-setup will always be overwritten by the new one. It is mandatory that both sides
transmit their number (CLIP).
For programming instructions see 5.8.2, 5.8.3, 5.10.2 and 7.5.

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1.3 Callback termination
The callback termination function is implemented to save fees on the mobile phone site. It is
possible to call the AS55X with or without transmitting your caller ID (CLIP / CLIR). The call-
setup or the call will be aborted immediately and the AS55X will initiate a callback to the
mobile phone.
There a few different possibilities:
1st: the incoming call will be rejected by the AS55X
(free of charge, callback via CLIP)
2nd: the incoming call has to be rejected manually by the mobile phone
(free of charge, callback via CLIP)
3rd: the call will be rejected after entering a code
(NOT free of charge, callback via DTMF code)
For programming instructions see 5.10.1, 5.8.2 and 5.10.3.
1.4 Short message callback request
To improve the callback options the ‘short message callback request’function is
implemented to supply a called subscriber with additional call information. If you call a
customer via GSM you can choose between number presentation (CLIP) or number
restriction (CLIR). In case of CLIR is active the customer sees a number of the AS55X but
could not know who is the subscriber of the calling number. With ‘short message callback
request’it is possible to send a SMS short message after a call with additional call
information. Two different text templates with up to 160 characters can be defined. The
selection of the text to be sent depends on the calls origin is within the PBX domain or not.
The text phrases are always the same but can be complemented by the following variables:
Calling number (SIP or ISDN number of calling party)
GSM channel number as displayed
GSM channel number in national order
Freely entered number via DTMF.
It is possible to send this short message automatically or controlled by the customer via
DTMF code. The calling party name is available for the SMS callback request for SIP calls.
For programming instructions see 5.8.5

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1.5 GSM channel groups
The routing function of the AS55x does not work via single GSM channels, because of the
higher channel number. Single channels can be combined to a group, but a group might also
consist of only one channel. Therefore, if the user does not want to work with groups, he can
simply assign one channel to each group (the configuration for GSM groups can do such
assignment automatically). Normally a GSM channel group consists of channels, registered
to the same GSM network. Routing functions of the AS55x point to groups. The selection of a
channel within a group is alternating, i.e. all channels of a group statistically will have the
same load.
One GSM channel can be a member of different groups, e.g. one group points to a VPN and
another one points to a GSM network.
For programming instructions see 5.9.3.
1.6 VPN
Virtual private networks (VPN) in GSM can significantly decrease costs, especially if GSM
channels of an AS55x are members of VPNs. Further characteristics of VPNs are that
members of a VPN can call each other via short user numbers without network prefixes, the
CLIP from member to member is displayed as such short user number as well.
The AS55x provides a special support for a comfortable access to GSM channels, which are
members of VPNs. In order to separate VPN user numbers from subscriber number at the
PBX, a VPN prefix has to be created for each GSM channel of the AS55X that is part of the
VPN. From the sight of the PBX, this GSM-VPN is an independent network with its own
prefix. For a dialling to a user of this network, the VPN prefix has to lead the VPN user
number. All routing functions of the AS55x can be used via this VPN prefix. For a call-setup
from a VPN member to the PBX, the AS55x adds the VPN prefix, so the PBX subscriber can
identify the caller as a VPN member. Callbacks will be routed correctly because of the
consequent use of the VPN prefix.
Example: The GSM channel 3 of an AS55x is a member of a VPN with the user number 4444.
The created VPN prefix for this GSM channel is +49123 (the VPN prefix has to be defined in
international order, here with the German country code). A PBX subscriber wants to call the
VPN member 5555, so he can dial 01235555 if the location of the PBX is in Germany as well.
The appropriately configured AS55x will route this call via GSM channel 3. If this VPN
member is calling a PBX subscriber himself, his number will also be displayed as 01235555.
If there is much traffic with a GSM VPN, multiple channels of an AS55x may get the same
VPN prefix. These channels are combined to a GSM channel group and the routing function
of the AS55x chooses one ready channel of this group if a call-setup to this VPN is made.
For programming instructions see 5.8.3, 5.10.2, 5.10.3, 5.11.1 and 5.11.5

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1.7 Internet
To fulfil the requirements for a mobile office use the WLL550 Pro can work as a broadband-
internet access which a basic function of the WLL550 Pro. The related radio channel with an
LTE or UMTS/HSPA+/HSDPA module is the radio channel one. A SIM card with high speed
data capabilities is mandatory in this case. Please also check the details of your mobile
phone contract for a special data tariff to avoid unexpected high charges.
The internet speed depends on various parameters, such as the type of your WLL550 Pro,
the capabilities of your mobile phone network, the local field strength quality and the
operating grade of the shared medium. Providing you have the optimal conditions an
internet speed of 7,2 MB/s is possible with UMTS and up to 40 MB/s via LTE.
The WLL550 Pro connects to the internet, if valid APN information is configured manually or
when the 'Go online' box is checked in the 'Internet' settings or the DTMF code #721# is
entered on the POTS interface.
For the use with a single computer you can connect the WLL550 Pro directly to the LAN
interface of the WLL550 Pro. But you need an external NAT-router if the internet access
should be available for further network devices.
For programming instructions see 5.10.4.
For LAN setup look here 5.2
1.8 PassThrough
PassThrough is available for all AS55X with BRI and PRI ISDN interface. Therefore the AS55X
will be looped into the connection between the PBX and the primary multiplexer
respectively the base terminal. No additional interface at your PBX is needed. All connection
in both directions will be supervised by the AS55X. Depending on the AS55X configuration,
the call will be redirected to the GSM network or signalized on both media. Calls which are
accepted on mobile phone can be redirected in the PBX. Calls from mobile phone can be
handled over the AS55X and so the CLIP of you PBX extension will be transmitted.
First operation mode is “MobileTwinning”. Meaning that all called numbers in direction to
PBX will be compared with a number list within the AS55X. If a listed number is detected, the
AS55X will initiate a parallel call to the mobile phone. So the PBX extension and the mobile
phone will ring simultaneously. Depending on the call accepting the other channel will be
closed.
The second operation mode is “Interception”. Here all calls in direction from PSTN will be
checked and all configured destinations will be routed via the GSM network. No channel to
the PSTN will be used.
For programming instructions see 5.8.3, 5.10.3 and 5.11.1.
more about the PassThrough backup mode here > 1.14

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1.9 SimSwitch
With a SimSwitch AS55X it is possible to use up to five SIM cards for each GSM channel. E.g.
SIM cards with a special amount of free minutes (SMS) can be used. The AS55x checks if the
maximum number of minutes is reached and switches automatically to the next SIM card.
This will also work with a free amount of SMS. It is also possible to change the SIM card
permanently in a circle
For programming instructions see 0.
1.10 Telnet
The AS55X is primarily designed as a voice device, but offers Telnet as an additional service.
Within the Telnet feature you have two operation modes:
First the “SMS/GPRS”-mode which can be used independently from the voice data and
secondly the “Full Access”-mode which must be used alternately to voice data. With Telnet
(and a virtual COM port or additional software) you can sent SMS, use GPRS or have full
access to one of the channel. There are up to two (AS550) or six (AS551) Telnet channels
available.
For programming instructions see 0 and 5.11.3.
1.11 SMS Server
Within the AS55X we created an interface to send SMS short messages directly from an
application via the AS55X. You need no additional Telnet channel license, no virtual COM
port driver and you can use up to 30 GSM channels of the AS551 for sending and receiving
SMS short messages. If you want to implement the SMS features into your applications, ask
your local dealer for “API for sending and receiving short messages via AS55X”. This is a small
proprietary API only for sending and receiving SMS via AS55x.
For programming instructions see 5.11.4.

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1.12 GSM-PBX
With GSM-PBX it is possible to achieve a direct link between a VoIP number and your mobile
phone. Your AS55X VoIP could be used as complete mobile PBX. Therefore you only need a
sufficient broadband connection. Your AS55X will register at your SIP provider so all calls will
be transmitted automatically to your mobile phone. The AS55X has to be SIP client. It is also
possible to use DTMF dialling.
In the other direction you can use the AS55X to present your VoIP number. Therefore a call
to the AS55X, followed by DTMF dialling is necessary.
For often used numbers it is possible to save some shortcuts.
For programming instructions see 5.7.1, 5.7.3, 5.7.4, 5.10.2, 5.10.3 and 5.11.5.
1.13 SNMP
To supervise your AS55X you can use a Service Software or SNMP (Simple Network
Management Protocol). It is possible to configure two SNMP Manager with different rights.
The AS55X supports SNMP version 1 with GET, SET and TRAP messages. For dedicated MIB
file ask your local dealer. The following functions are supported:
TRAP:
oSystem reboot
SET:
oStatistic reset
GET:
oSystem information (Device Type, Serial number, Hardware release, Firmware
release, Device name, Temperature, Number of GSM channel, ...)
oSystem statistic (Total system runtime, number of system reboots, min./max.
temperature, interface layer 2 errors, ...)
oWireless channel engine information (Serial number, firmware release, hardware
release,...)
oWireless channel errors (engine out of order, SIM missing, PIN of SIM unknown,
...)
oWireless channel mode (Channel not available, engine starting up, call to GSM
network, registered, voice call from GSM network, ...)
oWireless channel network information (registered network, signal quality, ...)
oWireless channel statistics (min. / max. signal quality, call attempts to GSM, calls
to GSM connected minutes to GSM, ...)
oSIM Switch information (active SIM, connected minutes for each SIM)
For programming instructions see 0.

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1.14 PassThrough backup mode
All calls shall be routed via GSM if the connection to fixed network is completely lost or if the
network cannot route the calls due to congestion or resource problems.
If “PassThrough backup”is activated a call proceeding tone or announcement will be heard if
a PassThrough backup call is in progress.
Please keep in mind, that the call-setup time is longer in this case as the AS55X BRI tries to
forward the call to the fixed network first. It checks via timer if all dialled digits did arrive and
finally it starts the call via GSM.
It is strongly recommended to check, if this audio signal can be heard by the calling user in
the case of a backup call as he should have knowledge about this special (and normally more
expensive) routing.
For programming instructions see 5.11.7
1.15 ProviderSimSwitch
The feature is only available for devices with the SimSwitch hardware
With powering up the WLL 550 Pro the “ProviderSimSwitch“ starts testing the GSM
networks by two criteria. First is the speed of the internet connection (UMTS, GPRS or no
access). Second is the signal quality of the GSM network. If a full working network is
detected (100% signal quality and full UMTS service) any further testing will be stopped
immediately. The search will be repeated until a working GSM network is found.
The time out for each SIM card logging into a GSM network is 45 seconds after the restart of
the GSM module. For testing the APN setup there is an additional period of 30 seconds to
connect to the internet.
Finally the “ProviderSimSwitch“ will remain at the SIM with the best available network. If a
network connection is lost for more than 10 seconds or if a new search is triggered
manually, the network search will restart considering the previous network data.
For programming instructions see 5.11.8

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1.16 DTMF Codes (WLL550 Pro)
In some cases instant access to the setup of the WLL 550 Pro is necessary. For this you can
use a simple touchtone phone on the analogue TEL-port (POTS) of the WLL 550 Pro.
to enter a PIN by DTMF, use the following code:
#*1*xxxx# for SIM of channel 1 and
#*2*xxxx# for SIM of channel 2.
xxxx is the place holder for the PIN number.
to force a GSM channel to register preferably onto the home network of the SIM. You
can cause a restart of one specific or of all GSM channels by using the following
DMTF codes:
#734# (REG) reset of all GSM channels
#7341# reset of GSM channel 1
#7342# reset of GSM channel 2
to separate outgoing fax calls from voice calls, you have to dial a fax prefix (e.g. *8
004944130005…) for each fax. This prefix (*8) is not a part of the called number will
be deleted by the WLL 550 Pro.
for triggering a network search manually (ProviderSimSwitch)
#77# for all GSM channels
#77n# for a specific GSM channel n = 1 or 2
The DMTF input will be acknowledged by a special tone.
The DTMF code of the WLL550 Pro for internet access has been enhanced
to allow data roaming.
#723#' for internet access with data roaming.
The already known code '#721#' keeps its function, internet access without data
roaming. Both codes are irrelevant, if internet access is configured with the service
software. Please keep in mind, your SIM contract must permit data roaming as well!

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Enabling the start hash codes for WLL550 Pro (FW 3.16)
It is possible now to enter start hash codes e.g. to switch call forwarding in GSM
networks. All codes beginning with a star can be entered normally. But all codes
beginning with a hash must be entered in a special manner as the beginning with
a hash will result in a conflict with internal DTMF commands of the WLL.
For codes beginning with one hash please enter 1# . For codes beginning with
a double hash please enter 2# .
E.g. to switch call forwardings off, 2#002# has to be entered.
To enable this feature, unnamed byte 9 must be set to 0and unnamed bit 75 must
be set (>>> Special settings).
Simplified internet access of the WLL550
As long as internet access is not set by service software, the access can be enabled
by the DTMF code #721# and disabled by the code #720# .
To select a SIM card of the ’ProviderSimSwitch‘ manually
#79nm# nis the place holder for the channel (1 or 2)
mis the place holder for the SIM- card (1 or 2)
Example: #7921# activates SIM card 1 of channel 2

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SERVICE MANUAL AS55X
55Xseries_manual_V3.22 (18-08-15) www.kuhnt.com 17
2Technical Features
2.1 AS551 Master (PRI/VoIP)
Power supply:
Built-in power supply
Voltage: 90 –264V AC, 47 –440 Hz
IEC power connector within two 2,5A fuses (medium time lag)
Power input: 6 channel (MC55i):
ca. 8W / ca. 17W (min/max)
Radio modules:
Gemalto/Cinterion MC55i
Quad band GSM 850/900/1800/1900 MHz
Gemalto/Cinterion TC63i/TC65i/TC65i-X
Quad band GSM 850/900/1800/1900 MHz
Gemalto/Cinterion EU3-E
Dual band UMTS 900/2100 MHz
Dual band GSM 900/1800 MHz
Gemalto/Cinterion PH8
Quad-band GSM 850/900/1800/1900MHz
Five-band UMTS 800/850/AWS/1900/2100MHz
Gemalto/Cinterion AGS2
Quad band GSM 850/900/1800/1900 MHz
Gemalto/Cinterion PHS8-P
Quad-band GSM 850/900/1800/1900MHz
Five-band UMTS 800/850/AWS/1900/2100MHz
Gemalto/Cinterion PLS8-E
Five Band LTE 800/900/1800/2100/2600 MHz,
FDD-Band (20,8,3,7,1)
Tri Band UMTS (WCDMA)
900/1800/2100 MHz, FDD-Band (8,3,1)
Dual Band GSM 900/1800 MHz
Antenna: 1x antenna splitter 6 to 1 - SMA female connector
3V Mini-SIM cards

SERVICE MANUAL AS55X
18 www.kuhnt.com 55Xseries_manual_V3.22 (18-08-15)
Interfaces:
LAN: Ethernet 10/100 Base-T, RJ45
USB: USB Type B
PRI: ISDN main, RJ45, S2M Output
ISDN aux, RJ45, clock synchronization, PassThrough input
Slave Connector, RJ45
Protocols:
SIP2.0 UDP/TCP, client-, server-, peer-mode
DHCP, DNS, STUN, ARP, VLAN, TELNET, SNMP
DSS1, QSIG
Codecs:
G.711 a-law/μ-law
Maintenance:
Service software (https://www.kuhnt.com)
Interfaces: local: USB (security: password)
remote: LAN, GSM (security: username and password)
Size:
19 inch rack aluminium (AS551) / 1 rack unit (1U)
Size: width: 483mm, height: 45mm, depth: 300mm
Weight: AS551 Master:
ca. 2,5kg
Environment
Operating temperature: 5°C to 40°C
Storage temperature: -10°C to 70°C
Humidity: 0% to 90%