DWM provides a range of SIP trunking solutions branded as MiLine.

A SIP Trunk is an IP based alternative to the traditional inbound and outbound PSTN and ISDN connections from a customer's PABX to the national, international and mobile telecoms networks.

MiLine solutions are increasingly used to provide resilience in the event of a failure in the PSTN or ISDN connectivity and vice versa. Automatic failover can be preconfigured, so users will be unaware of any loss of service.

DWM can offer standalone MiLine solutions, or SIP trunks which provide voice network access, as part of a multi site data network solution, where the available bandwidth makes so-called SIP breakout a logical choice.

MiLine can be provided over a variety of different mechanisms, including; xDSL, Leased Line and Ethernet.

MiLine interoperability with an IP PABX is a key consideration and Nine Telecom can offer direct SIP Trunk connection across a wide range of modern PABXs from vendors that include MItel, Panasonic, Avaya, NEC and many others, without the need for an expensive protocol converter gateway.

SIP trunks can also be used to provide access to network based applications such as call recording and conferencing.