For that purpose the free track signalling relay is designed as a signalling relay.

The query is intercepted by a signalling relay function node.

The signalling relay function receives signals from an MSC and routes as appropriate for number portability and with relevant protocol conversion.

A platform ('Ulyssees') supports a signalling relay function (SRF), a number portability location register (NPLR), and a number portbaility database (NPDB).

Mice in which the CD40 signaling relay was permanently activated developed severe colitis, but showed no other symptoms.

A network subscription database/signaling relay node, NSD/SRN, (17) and a multi-technology short message service center, MTS, (18) are shared between the networks.