DNS

Domain Name System, more commonly known as DNS, is a hierarchical decentralized naming system connected to the Internet or a private network. It translates domain names to the numerical IP addresses needed for locating and identifying services and devices on the network.

TelcoBridges and DNS

Toolpack provides support for DNS and FQDN (fully qualified domain name) for SIP calls. FQDN might be used in the signaling or in the media component of a call.

Based upon your system requirements, you can configure one or several DNS groups. Each group having one or several DNS servers sorted by priority.

A conceptual illustration is provided below:

TelcoBridges' DNS Implementation

TelcoBridges' DNS implementation works beside the SIP stack.

Supported DNS RFCs

TelcoBridges supports the following RFCs for DNS:

Specification	TMedia SIP stack support	Toolpack API Support	Media Gateway Application Support
RFC 1035 Domain Names	Yes	Complete	Complete
RFC 2782 DNS SRV Record	Yes	Complete	Complete
RFC 2915 NAPTR DNS Record	Yes	Complete	Complete

[1] For more information please contact customer support.

Configuration

FreeSBC	Tmedia/Tsig/Tdev
v3.0: SIP Signaling	v3.0: SIP Signaling v2.10: SIP Signaling v2.9: SIP Signaling v2.8: SIP Signaling

References

• Wikipedia article
• TelcoBridges SIP User’s Guide