SIP trunking

In telecommunications jargon, trunking is the process by which several lines or connections are combined into one shared line. In the world of VoIP, SIP providers are increasingly offering products which provide the ability to make several calls simultaneously using a single account. Together with the possibility of being able to contact SIP participants via a shared switchboard number with individual extensions (DDIs), these types of accounts are also becoming attractive for business customers.

There are two possible options when using a SIP account with trunking:





In this example we will take a look at a company planning to add a SIP trunking account with up to 10 extension numbers. The ISDN terminal devices with point-to-point line extensions used thus far can be retained. All new employees are to be issued with a SIP telephone with an extension via the SIP account.

Unique extensions are used since staff members have to be able to call one another internally. In order to migrate smoothly towards SIP, all ISDN terminal devices are to be contactable using their extension number in parallel with the switchboard number of the SIP account. An ISDN telephone should respond to calls to 0456-54321 12.

Outgoing calls should be directed via the SIP account.

www.lancom-systems.com

LANCOM Systems GmbH | A Rohde & Schwarz Company | Adenauerstr. 20/B2 | 52146 Wuerselen | Germany | E‑Mail info@lancom.de

LANCOM Logo