规划 Teams 语音解决方案Plan your Teams voice solution

本文帮助你确定哪个 Microsoft 语音解决方案适合你的组织。This article helps you decide which Microsoft voice solution is right for your organization. 确定后,本文提供内容路线图,实现所选解决方案。After you've decided, the article provides a roadmap to content that will enable you to implement your chosen solution.

备注

有关规划 Teams 语音解决方案作为从 Skype for Business Server 升级到 Teams 总体计划的一部分的指导,请参阅从本地 Skype for Business 升级到 Teams 的 PSTN 注意事项For guidance on planning a Teams voice solution as part as your overall plan to upgrade to Teams from Skype for Business Server, see PSTN considerations for upgrading to Teams from Skype for Business on-premises.

你可能希望使用具有呼叫 — 计划的最简单解决方案电话系统。You might want the simplest solution—Phone System with Calling Plan. 这是 Microsoft 的全云解决方案,可提供专用交换机 (PBX) 功能,并呼叫公用电话交换网 (PSTN) ,如下图所示。This is Microsoft's all-in-the-cloud solution that provides Private Branch Exchange (PBX) functionality and calls to the Public Switched Telephone Network (PSTN), as shown in the following diagram. 借助此解决方案,Microsoft 是你的 PSTN 运营商。With this solution, Microsoft is your PSTN carrier.

图 1 显示具有呼叫计划的电话系统

如果你对以下内容回答"是",则"电话系统与通话套餐"是适合你的解决方案:If you answer yes to the following, then Phone System with Calling Plan is the right solution for you:

  • 呼叫计划在你的地区可用。Calling Plan is available in your region.
  • 无需保留当前 PSTN 运营商。You do not need to retain your current PSTN carrier.
  • 您希望使用 Microsoft 托管的 PSTN 访问权限。You want to use Microsoft-managed access to the PSTN.

但是,情况可能更复杂。However, your situation might be more complex. 例如,你可能在呼叫计划不可用的位置设有办公室。For example, you might have offices in locations where Calling Plan isn't available. 或者,可能需要一个支持复杂、跨区域部署、对不同地理位置有不同的要求的组合解决方案。Or you might need a combination solution that supports a complex, multi-national deployment, with different requirements for different geographic locations. Microsoft 支持解决方案的组合:Microsoft supports a combination of solutions:

  • 具有通话套餐的电话系统Phone System with Calling Plan
  • 通过直接路由使用自己的 PSTN 运营商的电话系统Phone System with your own PSTN carrier with Direct Routing
  • 将电话系统与呼叫计划和电话系统与直接路由结合使用的组合解决方案A combination solution that uses both Phone System with Calling Plan and Phone System with Direct Routing

需要阅读哪些信息?What do you need to read?

全部必需。Required for all. 本文中的某些部分适用于所有组织。Some of the sections in this article pertain to all organizations. 例如,每个人都应该阅读有关电话系统的信息,并了解用于连接到 PSTN 公用电话交换 (的选项) 。For example, everyone should read about Phone System and understand the options for connecting to the Public Switched Telephone Network (PSTN).

全部必需Required for all 说明Description
电话系统Phone System Microsoft 的技术,用于通过 Microsoft Teams 在 Microsoft 365 云中启用呼叫控制和专用交换机 (PBX) 功能。Microsoft's technology for enabling call control and Private Branch Exchange (PBX) capabilities in the Microsoft 365 cloud with Microsoft Teams.
PSTN 公用电话交换 (PSTN) 连接选项Public Switched Telephone Network (PSTN) connectivity options 可以选择使用 Microsoft 作为电话运营商,还是使用直接路由将你自己的电话运营商连接到 Microsoft Teams。A choice between using Microsoft as your telephony carrier or connecting your own telephony carrier to Microsoft Teams by using Direct Routing. PSTN 连接选项与电话系统相结合,使用户能够拨打全球电话。Combined with Phone System, PSTN connectivity options enable your users to make phone calls all over the world.

根据你的要求。Depending on your requirements. 本文中的某些部分与现有的部署和要求相关。Some of the sections in this article are pertinent depending on your existing deployment and requirements. 例如,Location-Based直接路由客户在不允许收费绕过的地理位置进行直接路由。For example, Location-Based Routing is only required for Direct Routing customers in geographic locations that do not allow toll bypass.

请考虑可能需要以下附加配置中的哪一种:Consider which of these additional configurations you might need:

图 2 显示了其他语音组件,例如 Microsoft 的电话号码、拨号计划和呼叫路由等。

根据要求Depending on your requirements 说明Description
Microsoft 提供的电话号码Phone numbers from Microsoft 如何从 Microsoft 获取和管理电话号码,以及如何将现有号码转移到 Microsoft。How to get and manage phone numbers from Microsoft, and how to transfer existing numbers to Microsoft. 如果需要获取 Microsoft 呼叫计划的电话号码、转移现有号码、获取服务号码等,请阅读此内容。Read this if you need to obtain phone numbers for Microsoft Calling Plan, transfer existing numbers, obtain service numbers, and so on.
拨号计划和呼叫路由Dial plans and call routing 如何配置和管理将拨号电话号码转换为备用格式的拨号计划 (通常为 E.164 格式) 进行呼叫授权和呼叫路由。How to configure and manage dial plans that translate dialed phone numbers into an alternate format (typically E.164 format) for call authorization and call routing. 如果需要了解什么是拨号计划以及是否需要为组织指定拨号计划,请阅读此说明。Read this if you need to understand what dial plans are and whether you need to specify dial plans for your organization.
紧急呼叫Emergency calling 如何管理和配置紧急呼叫 — ,具体取决于 PSTN 连接选项。How to manage and configure emergency calling—depending on your PSTN connectivity option. 如果使用 Microsoft 呼叫计划或直接路由,并且需要了解如何为组织管理紧急呼叫,请阅读本部分。Read this section if you are using Microsoft Calling Plan or Direct Routing and need to understand how to manage emergency calling for your organization.
用于直接路由的基于位置的路由Location-Based Routing for Direct Routing 如何使用 LBR Location-Based路由 (,) 基于地理位置限制 Microsoft Teams 用户的免收费。How to use Location-Based Routing (LBR) to restrict toll bypass for Microsoft Teams users based on their geographic location. 如果组织在不允许绕过收费站的位置使用直接路由,请阅读本部分。Read this section if your organization is using Direct Routing at a location that does not allow toll bypass.
云语音功能的网络拓扑Network topology for cloud voice features 如果组织为直接Location-Based或) 的 LBR Location-Based (路由或 LBR) ,则必须配置网络设置,以与 Microsoft Teams 中的这些功能一起使用。If your organization is deploying Location-Based Routing (LBR) for Direct Routing or dynamic emergency calling, you must configure network settings for use with these features in Microsoft Teams. 如果要为直接路由实现 LBR,或者使用呼叫计划或直接路由实现动态紧急呼叫,请阅读本部分。Read this section if you are implementing LBR for Direct Routing, or if you are implementing dynamic emergency calling with Calling Plan or Direct Routing.
迁移现有语音解决方案Migrate your existing voice solution 将语音解决方案迁移到 Teams 时需考虑的问题。What you need to think about when migrating your voice solution to Teams. 如果要从现有语音解决方案迁移到 Teams,请阅读本部分。Read this section if you are migrating from an existing voice solution to Teams.

重要

本文重点介绍 Microsoft Teams 的语音解决方案。This article focuses on voice solutions with Microsoft Teams. 虽然 Skype for Business Online 解决方案 (如 Microsoft 电话解决方案) 中所述,但必须了解 Skype for Business Online 将于 2021 年 7 月 31 日停用。While solutions with Skype for Business Online are still available (as described in Microsoft telephony solutions), it's important to understand that Skype for Business Online will be retired on July 31, 2021. 在此日期之后,Skype for Business Online 服务将无法再访问。After that date, the Skype for Business Online service will no longer be accessible. 此外,将不再支持本地环境(无论是通过 Skype for Business Server 还是 Cloud Connector Edition)与 Skype for Business Online 建立 — — PSTN 连接。In addition, PSTN connectivity between your on-premises environment—whether through Skype for Business Server or Cloud Connector Edition—and Skype for Business Online will no longer be supported. 本文介绍 Teams 语音解决方案,以及如何在必要时使用直接路由将本地电话网络连接到 Teams。This article introduces Teams voice solutions and how you can connect your on-premises telephony network, if necessary, to Teams by using Direct Routing.

电话系统Phone System

电话系统是 Microsoft 的技术,用于通过 Microsoft Teams 在 Microsoft 365 或 Office 365 云中启用呼叫控制和专用交换机 (PBX) 功能。Phone System is Microsoft's technology for enabling call control and Private Branch Exchange (PBX) capabilities in the Microsoft 365 or Office 365 cloud with Microsoft Teams.

电话系统适用于 Teams 或 Skype for Business 客户端和经过认证的设备。Phone System works with Teams or Skype for Business clients and certified devices. 使用电话系统,可以使用直接从 Microsoft 365 或 Office 365 提供的一组功能替换现有 PBX 系统。Phone System allows you to replace your existing PBX system with a set of features directly delivered from Microsoft 365 or Office 365.

组织中用户之间的呼叫在电话系统内部处理,永远不会转到 PSTN (电话) 。Calls between users in your organization are handled internally within Phone System, and never go to the Public Switched Telephone Network (PSTN). 这适用于组织中位于不同地理区域的用户之间的呼叫,消除了这些内部呼叫的远程成本。This applies to calls between users in your organization located in different geographical areas, removing long-distance costs on these internal calls.

本文介绍以下电话系统关键特性和功能,以及需要考虑的部署决策:This article introduces the following Phone System key features and functionality, and the deployment decisions you'll need to consider:

图 3 显示电话系统包含自动助理和呼叫查询、云语音邮件和呼叫标识

有关所有电话系统功能以及如何设置电话系统的信息,请参阅以下文章:For information about all Phone System features, and how to set up Phone System, see the following articles:

有关管理受支持设备的信息,请参阅 在 Microsoft Teams 和 Teams 市场中 管理设备For information about managing supported devices, see Manage your devices in Microsoft Teams and Teams Marketplace.

自动助理和呼叫队列Auto attendants and Call queues

自动助理允许您设置菜单选项,以便根据呼叫者输入路由呼叫。Auto attendants allow you to set up menu options to route calls based on caller input. 呼叫队列正在等待呼叫者的区域。Call queues are waiting areas for callers. 自动助理和呼叫队列一起使用可以轻松地将呼叫者路由到组织中相应的人员或部门。Used together, auto attendants and call queues can easily route callers to the appropriate person or department in your organization.

有关自动助理和呼叫队列的信息,请参阅以下文章:For information about auto attendants and call queues, see the following articles:

云语音邮件Cloud Voicemail

由 Azure 语音邮件服务支持的云语音邮件仅支持对 Exchange 邮箱的语音邮件存款。Cloud Voicemail, powered by Azure Voicemail services, supports voicemail deposits to Exchange mailboxes only. 它不支持第三方电子邮件系统。It doesn't support third-party email systems.

云语音邮件包括语音邮件转录,默认情况下,为组织中的所有用户启用该功能。Cloud Voicemail includes voicemail transcription, which is enabled for all users in your organization by default. 你的业务需求可能要求你为特定用户或整个组织所有人禁用语音邮件转录。Your business needs might require that you disable voicemail transcription for specific users or everyone throughout the organization.

对于仅联机用户,为用户分配电话系统许可证后,会自动设置和预配云语音邮件。For online only users, Cloud Voicemail is automatically set up and provisioned for users after they are assigned a Phone System license. 对于具有 Exchange 邮箱的电话系统用户,需要执行额外的配置步骤。For Phone System users with an Exchange mailbox, you will need to perform extra configuration steps.

有关云语音邮件及其配置的信息,请参阅以下文章:For more information about Cloud Voicemail and its configuration, see the following articles:

调用标识Calling identity

默认情况下,所有出站呼叫使用分配的电话号码作为呼叫标识 (呼叫者 ID) 。By default, all outbound calls use the assigned phone number as calling identity (caller ID). 呼叫接收人可以快速识别呼叫方,并决定是接收还是拒绝呼叫。The recipient of the call can quickly identify the caller and decide whether to accept or reject the call. 有关配置来电显示或更改或阻止来电显示的信息,请参阅 为用户设置来电显示For information about configuring caller ID or to change or block the caller ID, see Set the caller ID for a user.

公用电话交换网络连接选项Public Switched Telephone Network connectivity options

电话系统为组织提供完整的 PBX 功能。Phone System provides complete PBX capabilities for your organization. 但是,若要让用户在组织外部进行呼叫,你需要将电话系统连接到 PSTN (电话) 。However, to enable users to make calls outside your organization, you need to connect Phone System to the Public Switched Telephone Network (PSTN). 若要将电话系统连接到 PSTN,可以选择以下选项之一:To connect Phone System to the PSTN, you can choose one of the following options:

还可以选择一组选项,用于为复杂环境设计解决方案,或管理多步骤迁移 (以后迁移) 。You can also choose a combination of options, which enables you to design a solution for a complex environment, or manage a multi-step migration (more about migration later).

具有通话套餐的电话系统Phone System with Calling Plan

如本文前面所述,具有通话套餐的电话系统是 Microsoft 为 Teams 用户提供的全云语音解决方案。As described earlier in this article, Phone System with Calling Plan is Microsoft's all-in-the-cloud voice solution for Teams users. 这是将 Microsoft Phone System 连接到公用电话交换网 (PSTN) 以拨打世界各地的座机和移动电话的最简单选项。This is the simplest option that connects Microsoft Phone System to the Public Switched Telephone Network (PSTN) to enable calls to landlines and mobile phones around the world. 使用此选项,Microsoft 为组织 (PBX) 专用交换机功能,并充当 PSTN 运营商,如下图所示:With this option, Microsoft provides Private Branch Exchange (PBX) functionality for your organization and acts as your PSTN carrier, as shown in the following diagram:

图 4 显示电话系统与自动助理、呼叫队列、呼叫者 ID 等,以及 Microsoft 作为 PSTN 运营商

如果你对以下内容回答"是",则"电话系统与通话套餐"是适合你的解决方案:If you answer yes to the following, then Phone System with Calling Plan is the right solution for you:

  • 呼叫计划在你的地区可用。Calling Plan is available in your region.
  • 无需保留当前 PSTN 运营商。You do not need to retain your current PSTN carrier.
  • 您希望使用 Microsoft 托管的 PSTN 访问权限。You want to use Microsoft-managed access to the PSTN.

使用此选项:With this option:

  • 你可获取 Microsoft Phone 系统,其添加的国内或国际呼叫计划允许拨打世界各地的电话 (具体取决于获得许可的服务) 。You get Microsoft Phone System with added Domestic or International Calling Plans that enable calling to phones around the world (depending on the level of service being licensed).

  • 不需要部署或维护本地部署,因为呼叫计划 — 在 Microsoft 365 或 Office 365 外运行。You do not require deployment or maintenance of an on-premises deployment—because Calling Plan operates out of Microsoft 365 or Office 365.

  • 注意:如有必要,可以选择通过直接路由连接受支持的会话边界控制器 (SBC) ,以与 SBC 支持的第三方 PBX、模拟设备和其他第三方电话设备进行互操作性。Note: If necessary, you can choose to connect a supported Session Border Controller (SBC) through Direct Routing for interoperability with third-party PBXs, analog devices, and other third-party telephony equipment supported by the SBC.

此选项需要不间断地连接到 Microsoft 365 或 Office 365。This option requires uninterrupted connection to Microsoft 365 or Office 365.

有关呼叫计划详细信息,请参阅以下文章:For more information about Calling Plan, see the following articles:

具有具有直接路由的 PSTN 运营商的电话系统Phone System with own PSTN carrier with Direct Routing

此选项使用直接路由将 Microsoft Phone System 连接到电话网络,如下图所示:This option connects Microsoft Phone System to your telephony network by using Direct Routing, as shown in the following diagram:

图 5 显示具有直接路由的电话系统

如果对以下问题回答"是",则电话系统与直接路由是适合的解决方案:If you answer yes to the following questions, then Phone System with Direct Routing is the right solution for you:

  • 你想要将 Teams 与手机系统一同使用。You want to use Teams with Phone System.
  • 你需要保留当前的 PSTN 运营商。You need to retain your current PSTN carrier.
  • 您希望混合路由,一些呼叫通过呼叫计划进行,一些呼叫通过运营商进行。You want to mix routing, with some calls going through Calling Plan, some through your carrier.
  • 需要和第三方 PBX 和/或设备(例如我们的开销寻呼机、模拟设备等)互操作。You need to interoperate with third-party PBXs and/or equipment such us overhead pagers, analog devices, and so on.

使用此选项:With this option:

  • 无需其他本地软件,即可将自己的受支持 SBC 连接到 Microsoft Phone System。You connect your own supported SBC to Microsoft Phone System without the need for additional on-premises software.

  • 几乎可以将任何电话运营商与 Microsoft Phone System 一同使用。You can use virtually any telephony carrier with Microsoft Phone System.

  • 您可以选择配置和管理此选项,也可以由运营商或合作伙伴组织配置和管理 (询问运营商或合作伙伴是否提供此选项) 。You can choose to configure and manage this option, or it can be configured and managed by your carrier or partner (ask if your carrier or partner provides this option).

  • 可以在电话设备(例如第三方 PBX 和模拟设备)与 Microsoft Phone System 之间配置 — — 互操作性。You can configure interoperability between your telephony equipment—such as a third-party PBX and analog devices—and Microsoft Phone System.

此选项需要以下各项:This option requires the following:

  • 不间断地连接到 Microsoft 365 或 Office 365。Uninterrupted connection to Microsoft 365 or Office 365.

  • 部署和维护支持的 SBC。Deploying and maintaining a supported SBC.

  • 与第三方运营商的合同。A contract with a third-party carrier. (除非部署为一个选项,为使用呼叫计划使用电话系统的用户提供第三方 PBX、模拟设备或其他电话设备) (Unless deployed as an option to provide connection to third-party PBX, analog devices, or other telephony equipment for users who are on Phone System with Calling Plan.)

有关直接路由详细信息,请参阅以下文章:For more information about Direct Routing, see the following articles:

Microsoft 提供的电话号码Phone numbers from Microsoft

Microsoft 提供两种类型的电话号码:订阅者 (用户) 号码(可分配给您的组织中的用户)和服务号码(以收费和免费服务号码提供)。Microsoft has two types of telephone numbers available: subscriber (user) numbers, which can be assigned to users in your organization, and service numbers, available as toll and toll-free service numbers. 服务号码的并发呼叫容量高于订阅者号码,可分配给音频会议、自动助理或呼叫队列等服务。Service numbers have higher concurrent call capacity than subscriber numbers and can be assigned to services such as Audio Conferencing, Auto Attendants, or Call Queues.

需要确定:You will need to decide:

  • 哪些用户位置需要 Microsoft 提供的新电话号码?Which user locations need new phone numbers from Microsoft?
  • 需要哪种类型的 (或) 电话号码?Which type of telephone number (subscriber or service) do I need?
  • 如何将现有电话号码移植到 Teams?How do I port existing phone numbers to Teams?

有关管理组织中电话号码(包括获取新号码或转移退出号码)的信息,请参阅以下文章:For more information about managing phone numbers in your organization, including getting new numbers or transferring exiting numbers, see the following articles:

拨号计划和呼叫路由Dial plans and call routing

拨号计划是一组规范化规则,将拨入的电话号码转换为备用格式 (通常为 E.164 格式) 进行呼叫授权和呼叫路由。A dial plan is a set of normalization rules that translate dialed phone numbers into an alternate format (typically E.164 format) for call authorization and call routing.

需要确定以下事项:You will need to decide the following:

  • 我的组织是否需要自定义拨号计划?Does my organization need a customized dial plan?
  • 哪些用户需要自定义拨号计划?Which users require a customized dial plan?
  • 应该向每个用户分配哪个租户拨号计划?Which tenant dial plan should be assigned to each user?

有关详细信息,请参阅以下文章:For more information, see the following articles:

紧急呼叫Emergency calling

如何配置紧急呼叫取决于 PSTN 连接选项:Microsoft 呼叫计划或直接路由。How you configure emergency calling differs depending on your PSTN connectivity option: Microsoft Calling Plan or Direct Routing. Microsoft 呼叫计划和电话系统直接路由的动态紧急呼叫提供配置和路由紧急呼叫以及根据 Teams 客户端的当前位置通知安全人员的功能。Dynamic emergency calling for Microsoft Calling Plan and Phone System Direct Routing provides the capability to configure and route emergency calls and notify security personnel based on the current location of the Teams client. 有关紧急呼叫概念和术语以及如何配置动态紧急呼叫的详细信息,请参阅以下文章:For more information about emergency calling concepts and terminology, and how to configure dynamic emergency calling, see the following articles:

Location-Based直接路由的路由Location-Based Routing for Direct Routing

在某些国家和地区,绕过 PSTN 公用电话交换网 (PSTN) 降低远程呼叫成本非法。In some countries and regions, it's illegal to bypass the Public Switched Telephone Network (PSTN) provider to decrease long-distance calling costs. Location-Based直接路由的路由允许根据 Microsoft Teams 用户的地理位置限制免收费。Location-Based Routing for Direct Routing enables you to restrict toll bypass for Microsoft Teams users based on their geographic location. 若要详细了解如何计划和配置 Location-Based LBR (路由) ,请参阅以下文章:For more information about how to plan and configure Location-Based Routing (LBR), see the following articles:

语音功能的网络拓扑Network topology for voice features

如果要为直接路由部署动态紧急呼叫Location-Based路由,则必须配置网络设置,以与 Microsoft Teams 中的这些功能一同使用。If you are deploying dynamic emergency calling or Location-Based Routing for Direct Routing, you must configure network settings for use with these features in Microsoft Teams. 若要了解如何为网络区域、网络站点、网络子网和受信任的 IP 地址配置网络设置,请参阅以下文章:To learn how to configure network settings for network regions, network sites, network subnets, and trusted IP addresses, see the following articles:

将现有语音解决方案迁移到 TeamsMigrate your existing voice solution to Teams

对于要升级到 Teams 的组织,最终目标是将所有用户移到 TeamsOnly 模式。For an organization that is upgrading to Teams, the ultimate goal is to move all users to TeamsOnly mode. 仅在用户进入 TeamsOnly 模式时,才支持将手机系统与 Teams 一同使用。Using Phone System with Teams is only supported when the user is in TeamsOnly mode. 如果需要有关升级到 Teams 的基本信息,请从此处开始:If you need basic information about upgrading to Teams, start here:

迁移语音解决方案时,迁移到 TeamsOnly 模式时,有四种可能的呼叫方案:When migrating your voice solution, there are four possible calling scenarios when moving to TeamsOnly mode:

  • Skype for Business Online 中的用户,具有 Microsoft 呼叫计划A user in Skype for Business Online, with a Microsoft Calling Plan. 升级后,此用户将继续拥有 Microsoft 呼叫计划。Upon upgrade, this user will continue to have a Microsoft Calling Plan.

  • Skype for Business Online 中的用户,通过本地 Skype for Business 或 Cloud Connector Edition 提供本地语音功能。A user in Skype for Business Online, with on-premises voice functionality through Skype for Business on-premises or Cloud Connector Edition. 用户升级到 Teams 需要与将用户迁移到直接路由进行协调,以确保 TeamsOnly 用户具有 PSTN 功能。The user’s upgrade to Teams needs to be coordinated with migration of the user to Direct Routing to ensure the TeamsOnly user has PSTN functionality.

  • 本地 Skype for Business 中具有 企业语音 的用户,该用户将移动到联机并保持本地 PSTN 连接。A user in Skype for Business on-premises with Enterprise Voice, who will be moving to online and keeping on-premises PSTN connectivity. 将该用户迁移到 Teams 需要将用户的本地 Skype for Business 帐户移动到云,并协调该移动以及将用户迁移到直接路由。Migrating this user to Teams requires moving the user’s on-premises Skype for Business account to the cloud, and coordinating that move with migration of the user to Direct Routing.

  • 本地 Skype for Business 中具有 企业语音 的用户,该用户将移动到在线,使用 Microsoft 呼叫计划 。A user in Skype for Business on-premises with Enterprise Voice, who will be moving to online and using a Microsoft Calling plan. 将该用户迁移到 Teams 需要将用户本地 Skype for Business 帐户移动到云,并协调该移动与 A) 该用户电话号码的端口移动到 Microsoft 呼叫计划或 B) 从可用区域分配新的订阅者号码。Migrating this user to Teams requires moving the user’s on-premises Skype for Business account to the cloud, and coordinating that move with either A) the port of that user’s phone number to a Microsoft Calling Plan or B) assigning a new subscriber number from available regions.

若要详细了解如何针对每种方案实现语音迁移,包括有关何时需要设置混合连接以及如何将具有本地语音功能的用户迁移到直接路由的信息, — — 请参阅以下文章:For more information about how to implement your voice migration for each of these scenarios—including information about when you need to set up hybrid connectivity and how to migrate users with on-premises voice functionality to Direct Routing—see the following articles: