ISDN Telephone Systems
ISDN PBX systems use the digital basic rate interface (BRI, S0, 2B+D) or primary rate interface (PRI, S2M, 30B+D) for high-quality voice telephony and fast data transmission per Euro-ISDN standard (ETSI ETS 300 102, DSS1). They offer features such as CLIP, CLIR, MSN routing, group call, conference and CTI interface (CSTA, TAPI) for integration with PC-based applications. Available for existing installations from Auerswald (COMpact series), Agfeo (AC 14/41), Tiptel (280 ISDN) and other German manufacturers. ISDN PBX systems can be connected to all-IP lines via VoIP gateways (SIP-ISDN) to protect the investment.
Common Manufacturers: Auerswald • Agfeo • Tiptel • Siemens • Elmeg
Top sellers in ISDN
ISDN from Agfeo
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 AGFEO ES 730 IT
Full IP system in a 48,3 cm ( 19 inch ) housing (black), 4 U, LAN connection, 3 free module slots for individual expansion of the system. Up to 16 VoIP channels (10 in the basic configuration, 6 more ...Lieske Part No.: 1289365 Mfg Part No: 6101471 |
-9% 1.017,27 EUR 1.121,26 EUR
 plus delivery charges
Delivery time from supplier's stock (ca.) 6 workdaysinfo_outline
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ISDN from Auerswald
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 Auerswald Compact 3000 ISDN
Be connectivity 4 trunk lines possible (2 x ISDN trunk plus 2 x VoIP)" 8 user ports possible "1 ISDN trunk port" 4 analog ports (symmetrical) "With one module erweiterbarDas system has the basic ...Lieske Part No.: 645419 Mfg Part No: 90577 |
265,45 EUR
plus delivery charges
Delivery time on requestinfo_outline
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ISDN from doro
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Doro PhoneEasy 115 white
Cordless DECT phone with a large backlit dot matrix display, large font and large figures, Optical call signaling button for volume boost (+30 dB), speaking keys (7 languages), Hearing aid compatible, ... Lieske Part No.: 289167 Mfg Part No: 380109 |
70,75 EUR
plus delivery charges
Delivery time on requestinfo_outline
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ISDN from lieske elektronik
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Lieske elektronik AGFEOPREINST Agfeo Pre PBX
Free Pre ordered a telephone system. The system is configured as desired, so that it must only be connected to the telephone network and is immediately ready for use. One or more configuration ... Lieske Part No.: 108657 Mfg Part No: AGFEOPREINST |
0,01 EUR
plus delivery charges
in stockinfo_outline
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ISDN Telephone Systems – Product Details & Advice
ISDN PBX systems use the digital basic rate interface (BRI, S0, 2B+D) or primary rate interface (PRI, S2M, 30B+D) for high-quality voice telephony and fast data transmission per Euro-ISDN standard (ETSI ETS 300 102, DSS1). They offer features such as CLIP, CLIR, MSN routing, group call, conference and CTI interface (CSTA, TAPI) for integration with PC-based applications. Available for existing installations from Auerswald (COMpact series), Agfeo (AC 14/41), Tiptel (280 ISDN) and other German manufacturers. ISDN PBX systems can be connected to all-IP lines via VoIP gateways (SIP-ISDN) to protect the investment.
System phones for ISDN systems: ISDN System Phones. Migration to IP: IP System Phones. Advice: +49 (0)7666 / 88499-0.
Frequently Asked Questions
▶ How long will ISDN lines still be supported? Deutsche Telekom and many other providers have largely switched ISDN lines to all-IP. New ISDN connections are barely being issued; existing ones run for a few more years depending on the provider. Plan medium- to long-term migration to SIP trunking. ISDN PBX systems can be bridged with a SIP-ISDN gateway. |
▶ What is CTI and what interfaces are available? CTI (Computer Telephony Integration) connects the PBX and PC application. Standard interfaces: TAPI (Windows Telephony API, Microsoft) for Windows applications, CSTA (Computer Supported Telecommunications Applications, ECMA-269) for manufacturer-independent integration. CTI enables caller popup in CRM, automatic dialling from contact list and call logging. |
▶ Does it still make sense to buy a new ISDN system? For new installations, purchasing an ISDN system is no longer recommended as ISDN lines are phasing out. More sensible is starting with an IP PBX (SIP) with optional ISDN S0 port for the transition period. For spare parts and expansion of existing systems, we offer remaining stock and used equipment. |