2-channel GSM – VoIP – BRI gateway

AS550, what it is good for? e.g.

… because there is no landline connection.
… because the existing fixed line connection is permanently broken.
… because a fixed line connection is not required at all.
… because the existing fixed network connection is not reliable.
… from the basic security considerations to have a backup connection.

By connecting a telephone system directly to the mobile phone network, the AS550 improves the operational security of the communication and the accessibility of a company. For this purpose, the AS550 is either connected between the trunk line and the telephone system ‘PassThrough‘ * or as an additional full line replacement. It can replace an ISDN NTBA or 2 VoIP lines.

Software modules, in the form of so – called ‘Extended Features‘, such as the Telnet control, the SNMP module or a Short-message-API etc. expand the range of use.

All optional software modules can also be used by a free 28-day Test License.

* ‘PassThrough’ is only available on the ISDN (BRI) port


Produktinfo - DE  
Manual - EN
FAQ AS55x - DE

Functional overview

Interfaces- 2 Quad-band radio modules for
EGSM 900/GSM 1800 (optional quad-band)
- Integrated antenna splitting
- Basic Rate Interface
S0 point-to-point or
S0 point-to-multipoint
TE or NT simulation
- S0  clock synchronisation
resp. PassThrough
- 10/100 Base-T Ethernet LAN
for VoIP using SIP-protocol
- Direct call can be defined individually
for each radio channel
- Assignment of the radio channels by groups
- Call back unrestricted, limited by Blacklist,
Whitelist or DTMF code
- Storing answered and unanswered calls
- The link extension call number is called
mobile subscriber is stored in the device
and is used for the call back.
- Callback request via SMS short message
- Very fast connection setup PBX
to mobile radio
- Full dial-up capability
- GSM to ISDN/IP number display (CLIP)
- Relocation from mobile to fixed
with GME * (optional)
- SMS short messages via TELNET *
or short news API *
* With a software module (optional)
- Causes (ISDN causes) are adjustable
- Built-in LCR functions, routing tables
for destination and source call numbers
- Possibility of blocking certain numbers
or prefixes
- Adjustable phone number display
- GSM minimum signal quality
for connection setup
- Direct call per external GSM subscriber
adjustable GSM > ISDN/IP (CLIP) etc.
Maintenance PC configuration software for Microsoft
Windows© 9x/NT/2000/XP/VISTA/Windows 7,8,10
- Remote configuration and maintenance via LAN
ReverseIP or GSM data channel
- Configuration and maintenance during operation
- Firmware update via LAN or via GSM data channel
- Operating status display via LEDs
- Troubleshooting by local or remote
recording of traces which can be stored in
text or Wireshark© format.
- Monitoring via SNMP *
* With a software module (optional)

Technical Data

Radio moduleCinterion BGS2-E*
GSM dual-band modem
Class 4 (2W) for GSM900
Class 1 (1W) for GSM1800
Conform to GSM phase 2/2+
GPRS multi-slot Class 10
*(optional BGS2-W quad-band)
LAN-network, ReverseIP
or GSM cs-data
Power supplyCoaxial power connector
for wall power supply:
DC 7,5- 30 V / max. 1A
ISDN interface TES0 subscriber terminal
or S0 tie line
ISDN interface NTS0 NT simulation
with DSS1
ISDN protocolsDSS1 or QSIG protocol
IP - interfaceRJ 45 Ethernet 10/100 Base-T
SIP 2.0 / UDP as Server, Client
or Peer-To-Peer
Additional Protocols:
Codec: G.711 µ-law, G.711 a-law
Authentification: MD5
Data and
SMS services
by TELNET with
a software add-on (optional)
software add-on (optional)
Antenna1 antenna splitter/combiner
2 x 1 SMA female
Sizeapprox. W 153mm x H 35mm x D 185 mm
Weightapprox. 750 Gramm
min. 3W / max. 6 W
Operating temperature range:
5°C to 40°C
Storage temperature range:
-10°C to 70°C
Humidity range:
0% to 90%
Subject to modifications!