SIP (Session Initiation Protocol) is a signaling protocol used to convert voice into packets so it can travel across IP networks. DSCI’s SIP Trunking service connects your existing PBX phone system over your data network to the DSCI network with the voice service layered on top of the network as just another IP application.

• Available as a stand-alone service over an existing Internet connection or coupled with DSCI DIA or MPLS service.
• DSCI SIP Trunking with Hosted SBC option allows customers with multiple PBXs to utilize a single SIP trunk to share capacity, increase savings, and provide redundancy.
• Access local, long distance and toll-free service and Internet over a single circuit.
• 911, 411 and operator services available.
• Direct Trunk Overflow enables incoming calls to be routed to an alternate number(s) when a SIP Trunk group is busy or if the T1 is out of service.
• Caller ID

Extended SIP Trunking – T1 access and SIP trunk provided outside the DSCI network footprint through alternate T1 providers.

SIP Trunking with Hosted SBC (Session Border Controller) – allows multiple customer VoIP-enabled PBXs to send and receive phone calls through the DSCI network. Customers utilize a single SIP trunk to share capacity, provide cost savings, and build redundancy.