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PROPRIETARY & CONFIDENTIAL

1 Audience

This document is intended for the SIP Trunk customer’s technical staff and Value Added Retailer (VAR)

having installation and operational responsibilities.

2 Introduction

This Configuration Guide describes the configuration steps for Cox SIP Trunking with the Cisco Unified

Communications Manager (CUCM) 7.1.3(b) and the Cisco Unified Border Element (CUBE) for

connectivity to Cox’s SIP Trunking service. Cox’s SIP Trunking provides both inbound and outbound call

services replacing traditional ISDN PRI services.

Cox SIP Trunking is a scalable and efficient IP trunking telecommunication solution for your business that

provides all the traditional services such as Direct Inward Dialing, Hunting, Calling Name, Calling Number,

Local/Long Distance and Business Continuity options, including:

 Burstable Trunk Capacity – Dynamically increases call capacity during peak busy periods so your

customers never receive a busy signal.

 Call Forward Always – On the trunk group pilot number for all calls in case of an outage (flood,

fire, power outage, etc.).

 Call Forward Not Reachable – On the trunk group pilot number that operates on a per-call

contingency basis to forward the call to any PSTN number (i.e., call center or alternate office

location) during temporary call completion impairments.

 Route Exhaustion – Automatic reroute of trunk group calls to any PSTN phone number (i.e., a call

center) if calls can’t be completed to the PBX.

 Support for geo-redundant PBX deployments and automatic reroute of SIP Trunks to the backup

customer data center.

All calls are routed over Cox’s national fiber network with guaranteed Quality of Service (QoS); calls never

traverse the Internet.

Figure 1 – Cox Fiber Network

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