Female healthcare worker on the phone at work.


SIP Trunks

We offer an advanced SIP trunking solution with greater efficiencies and potential savings.


Scalable with up to 800 concurrent call sessions (CCS)


Optimizes IP PBX investment


Centralized management and hardware consolidation, ideal for multi-location businesses

Product overview

Comcast Business SIP Trunking is delivered over the largest VoIP network in the nation. The service provides dedicated bandwidth, with 100 Mbps connection, to ensure streamlined voice and data traffic. The flexibility of Comcast SIP allows for multiple ways to configure your Enterprise — allowing for 6 CCS and up to 800. You configure the trunks however your Enterprise requires — inbound, outbound, 2-way, single or multiple trunk groups. You can also activate continuity features, like Overflow and Failover, to ensure that you will not miss a call due to call volume or an outage. Plus, it all comes backed by a Comcast Business Quality of Service (QoS) with Service Level Agreements, and expert 24/7/365 support.

chart diagram depicting Comcast Business SIP Trunking

SIP Trunk features:

Call Forward Not Reachable Reroute calls to a predetermined number in the event of natural disaster or power outage.
Caller ID Name (CNAM) Pair caller data to see the name and number of the person calling you.
Direct Inward Dial (DID) Assign your employees a direct dial number for their convenience.
Direct Outward Dial (DOD) Users on the PBX can place calls to outside lines without a switchboard attendant.
Failover/Overflow Provides additional bandwidth when there is an outage or when all lines are busy.
Destination unreachable Automatically reroute incoming calls to an alternate trunk group in case of a natural disaster or power outage.
Multi-site load balancing Route calls to additional channels on other trunk groups.
On-demand bursting Temporarily increase call capacity to accommodate spikes in volume.
Call Detail Records (CDR) Download detailed call records.
International calling Dial and speak; no long PINs to enter, just enter the phone number. Get billed only for what you use every month.