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  • Overview
  • Features
  • Compatible PBX's
  • Voice Quality
Overview

Our SIP works with top IP-PBX manufacturers

 

SIP

Session Initiation Protocol (SIP) is the common signaling standard for real-time communications including Voice over Internet Protocol (VoIP). SIP is an open-standard which allows carrier voice equipment to interoperate seamlessly with customer premise equipment (CPE). The logical voice channel established between them is referred to as a SIP Trunk; a virtual phone line that utilizes a Broadband connection for access.

Convergence works directly with an IP PBX as well as with legacy customer premise equipment (CPE) which uses an Integrated Access Device (IAD), commonly referred to as a gateway.

Convergence SIP Trunking delivers inexpensive local, toll-free, domestic and international long distance service through the Convergence national footprint covering North America with per trunk and per minute rates much lower than that of traditional service. Also, with phone numbers from over 5,000 rate centers, Convergence can provide new or port existing numbers nationwide.

 

Features and Benefits of SIP Trunking

Built for Savings - The features of Convergence Phone Service

Service Features
  • Inbound Calling
  • 800 Inbound (requires purchase or port)
  • Long Distance Termination (includes intra-, inter-state and international)
  • Expanded Local Calling
  • Outbound calling to 888, 877, 800 numbers
  • e911
  • 411 and Operator Services
  • Inbound Caller ID and Location
  • White Page Listing
  • Toll-Free
  • Domestic and International Long Distance
  • G.711 and G.729a Codecs
  • UDP & TCP

 

Benefits - Smart Reasons to Switch to SIP Trunks
  • Save Money - Enjoy the cost savings of converging your local, long distance and broadband Internet services onto a single circuit with dynamic bandwidth allocation.
  • Save Time - Dedicated and knowledgeable Convergence engineers, installation teams and customer support specialists assure rapid deployment.
  • Simplify - Experience the efficiency of managing a single network connection, receiving one bill and engaging one point of contact for all your local, long distance, and broadband Internet needs.
  • Protect your Investment - Preserve your existing capabilities via seamless integration with your existing SIP IP PBX system. Visit our IP PBX page to see which vendors we support!
  • Grow Your Business - When you grow, adding more SIP Trunks is easy, and happens in days, not weeks. SIP Trunks can be installed and turned up remotely so you do not have to slow down.
 
Will My Phone System Work

Our SIP works with top IP-PBX manufacturers

Convergence SIP trunking  can work with any PBX that has a T-1 Interface, however, if your PBX supports SIP trunking than you will not need an interface device and our SIP trunking will work seamlessly with your PBX.  See if your PBX is listed below.

 

Allworx  
Allworks

The Allworx 6x, 10x and 24x families of PBX have proven to work with our SIP Trunks.

Altigen
Altigen

Altigen's Max 1000 SIP Platform PBX has been tested and shown to interoperate with Convergence SIP Trunks.

Asterisk
Asterisk

Convergence SIP Trunks power the Asterisk Open Source IP-PBX platform.

Avaya
Avaya

Convergence interoperates with the Avaya IP Office PBX.

Cisco
Cisco

The Cisco Unified Communications Manager has been tested extensively with Convergence SIP Trunks.

Digium
Digium

Digium's Asterisk Appliance 50 has been tested extensively with Convergence SIP Trunks.

FreePBX
FreePBX

Convergence proudly supports the open source efforts of the FreePBX community, and our SIP Trunks work well with FreePBX.

Mitel
Mitel

Mitel 3300 IP Communications Platform works with Convergence SIP Trunks.

 
Samsung
Samsung

Samsung's OfficeServe 7000 line of IP PBXes work with Convergence SIP Trunks.

Shoretel
Shoretel

The ShoreTel Shoregear PBX features complete interoperability with Convergence SIP Trunks.

 
Talkswitch
Talkswitch

Convergence interoperates with Talkswitch phone systems.

Taridium
Taridium

Taridium's iPBX interoperates fully with Convergence's SIP Trunking service.

Taridium

3COM

The 3com NBX V3000 PoE Bundle works with Convergence SIP Trunks.

 

Voice Quality

Voice Quality and End to End Redundancy

Customer Premise

Convergence ensures that the customer's LAN and WAN are optimized by ensuring that the voice traffic (which is “real-time” traffic) has the highest priority from the phone to the switch. This is done with 802.1q VLAN tagging. When traffic is passed from the switch to the router, the traffic carries the same VLAN on the LAN side of the router. The router is set up with QoS and will tell the router that UDP traffic (voice traffic) has a higher priority as it leaves the internet connection. We prefer a non shared WAN service such as DSL, T-1 or MPLS as these circuits have a direct connection to the closest central office. The central office has a high capacity fiber optic connection to the core internet backbone. The core internet backbone routers will sense that UDP traffic is passing and automatically give it a higher priority.  However, this is rarely used as backbone interconnections are always multiple OC192 10Gbit/s or OC768 40Gbit/s and are always upgraded as usage hits 80% of capacity.

 

Convergence Data Center
The Convergence Systems Data Center has 8 OC48's blended 20Gbit/s, and load balanced from multiple carriers using diverse entry into the building to multiple AT&T CO’s. The Data Center has a route science load balancer that will intelligently find the quickest and best quality route, even if it’s a longer route with more hops. The Data Center has a 24/7 NOC, redundant CRAC cooling systems, humidity control, 24 hour battery backup with a generator that stores two weeks of diesel fuel.

 

 


System Architecture
When voice traffic comes in, it is routed by two redundant 6509 Cisco routers. The System is made up of a cluster of redundant Sun Servers that run Mitel call control software configured as user and trunking gateway systems. Dial tone is provided by multiple PRI's coming from multiple fiber connections, backed-up by SIP trunking that can be routed over one of the 8 OC48 connections. All telephony applications run on a high available VMware environment tied into a SAN.