---
title: "MS Teams - ​​​​​​​DHCP Configuration for Skype for Business Phones (3PIP/SIPGateway)"
slug: "ms-teams-dhcp-configuration-for-skype-for-business-phones-3pip-sipgateway"
tags: ["calltower", "public"]
updated: 2026-07-29T17:05:03Z
published: 2026-07-29T17:05:03Z
canonical: "learn.calltower.com/ms-teams-dhcp-configuration-for-skype-for-business-phones-3pip-sipgateway"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://learn.calltower.com/llms.txt
> Use this file to discover all available pages before exploring further.

# MS Teams - ​​​​​​​DHCP Configuration for Skype for Business Phones (3PIP/SIPGateway)

### Provisioning Server Location

When receiving a dynamic IP Address on the network phones will by default look for the location of a provisioning server by first checking for the existence of DHCP **Option 66**. In the event that option **66** is not configured then it will fall back to looking for **Option 160**.

**To use option 66**

- Using *DHCP Manager* configure the *Server Options* under an existing IPv4 scope and then enable option **066 Boot Server Host Name**.
  - [http://pps.calltower.com/](http://pps.calltower.com/) (Skype for Business)
  - [http://noam.ipp.sdg.teams.microsoft.com](http://noam.ipp.sdg.teams.microsoft.com) (Teams - SIP Gateway for Operator Connect or Direct Routing)

![3.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/3(16).png?sv=2026-02-06&spr=https&st=2026-11-04T18%3A17%3A31Z&se=2026-11-04T19%3A17%3A31Z&sr=c&sp=r&sig=p0l0vuG8fKM8vgU%2BM2x4fwBE6965LrvUlW%2BCuvXkOv0%3D)

**In the event that option 66 is to be used instead of option 160 then it can be defined in a Microsoft DHCP server by simply configuring the pre-defined option.**

**If planning to use option 160 with a DHCP server that does not already have it defined, like Microsoft Windows DHCP, then the option will first need to be created.**

- Using *DHCP Manager* highlight the network type object (e.g. *IPv4*) and then select the **Set Predefined Options** action.
- Click **Add** to create a new option and then enter a descriptive name (e.g. UCS Boot Server Name). Change the *Data Type* to **String** and then enter **160** as the *Code* value. If desired add a *Description* and then save the new option.

![1.jpg](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/1(11).jpg?sv=2026-02-06&spr=https&st=2026-11-04T18%3A17%3A31Z&se=2026-11-04T19%3A17%3A31Z&sr=c&sp=r&sig=p0l0vuG8fKM8vgU%2BM2x4fwBE6965LrvUlW%2BCuvXkOv0%3D)

- Configure the *Server Options* under the same network scope and then select option **160 UCS Boot Server Name**.
  - [http://pps.calltower.com/](http://pps.calltower.com/) (Skype for Business)
  - [http://noam.ipp.sdg.teams.microsoft.com](http://noam.ipp.sdg.teams.microsoft.com) (Teams - SIP Gateway for Operator Connect or Direct Routing)

![2.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/2(17).png?sv=2026-02-06&spr=https&st=2026-11-04T18%3A17%3A31Z&se=2026-11-04T19%3A17%3A31Z&sr=c&sp=r&sig=p0l0vuG8fKM8vgU%2BM2x4fwBE6965LrvUlW%2BCuvXkOv0%3D)

**Firewall Considerations:**

Please Refer to our Firewall Documentation and make sure Hardware Phones are able to access pps.calltower.com on all the correct ports.

[MS Teams - ​​​​​​​DHCP Configuration for Skype for Business Phones (3PIP/SIPGateway)](/v1/docs/ms-teams-dhcp-configuration-for-skype-for-business-phones-3pip-sipgateway#dhcp-configuration-for-skype-for-business-phones-3pip-or-sipgateway)

For more information about SIP Gateway to support 3PIP Devices check this Microsoft Documentation:

Plan for SIP Gateway: [https://docs.microsoft.com/en-us/mic...p-gateway-plan](https://docs.microsoft.com/en-us/microsoftteams/sip-gateway-plan)

An Internet Protocol (IP) Address is a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network.

Session Initiation Protocol, is the technology that starts, manages, and ends internet-based phone calls and video meetings between people and devices.

A service allowing customers to choose their telecom provider for making and receiving calls in Microsoft Teams.

Microsoft Teams (MS Teams) is a collaboration platform that combines workplace chat, video meetings, file storage, and application integration.