SN4554 overview
14
SN4554 Getting Started Guide
1 • General information
SN4554 overview
The SmartNode 4554 ISDN BRI PSTN Gateway (see
figure 1
) converts up to four simultaneous phone or fax
calls from SIP or H.323 to BRI ISDN. it is a compact, reliable stand-alone VoIP gateway for IP-based voice
systems which matches up to ISDN standards in terms of performance and quality.
Compared to PC-based solutions that combine IP-PBX and a PCI BRI card, the SN4554 has several advan-
tages: No need to install additional drivers or software, new services can be installed without downtime, several
SN4554 can be combined and serve as redundant cluster, no ventilation or hard disk required, scaleable with-
out limitation by the amount of PCI card slots available. Also, system administrators don’t have to learn ISDN,
as industry standard protocols like SIP or H.323 do the job of connecting PSTN to your voice system.
The SN4554 perfectly integrates in today’s IP-PBX systems supporting their advanced functionality, while pre-
serving the majority of ISDN comfort features. The following features are integrated into the SN4554: Advice
of Change (AOC), Explicit Call Transfer (ECT), CLIP, CLIR, 64k transparent data calls, support for both
MSN and DID lines, overlap dialing, call waiting, and call hold.
Figure 1. SN4554
The SN4554 performs the following major functions:
•
Four channels of Voice or Fax-over-IP through two Euro-ISDN BRI/S ports (TE orientation).
•
Standards-compliant VoIP in accordance with SIP or H.323 protocols.
•
10/100Base-T Ethernet WAN port for connection to a router, xDSL, cable, or wireless modem.
VoIPon www.voipon.co.uk [email protected] Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
