--- title: "Intercom Call Configuration" slug: "intercom-call-configuration-20" updated: 2025-03-07T08:26:20Z published: 2025-03-10T02:57:56Z canonical: "knowledge.akuvox.com/intercom-call-configuration-20" --- > ## Documentation Index > Fetch the complete documentation index at: https://knowledge.akuvox.com/llms.txt > Use this file to discover all available pages before exploring further. # Intercom Call Configuration ## IP Call Configuration An IP call is a direct call between two intercom devices using their IP addresses, without a server or a PBX. IP calls work when the devices are on the same network. ### Make IP Calls Press the target IP number, e.g. 192*168*35×134 on the handset and press # to call. ## SIP Call Configuration Session Initiation Protocol(**SIP**) is a signaling transmission protocol used for initiating, maintaining, and terminating calls. A SIP call uses SIP to send and receive data between SIP devices, and can use the internet or a local network to offer high-quality and secure communication. Initiating a SIP call requires a SIP account, a SIP address for each device, and configuring SIP settings on the devices. ### SIP Account Registration Each device needs a SIP account to make and receive SIP calls. Akuvox intercom devices support the configuration of two SIP accounts, which can be registered under two independent servers. Click [here](https://knowledge.akuvox.com/docs/how-to-register-sip-server#register-sip-accounts) to view the SIP account registration example. Register SIP accounts on the **Account > Basic** interface. ![图片.png](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/%E5%9B%BE%E7%89%87-0YZKFA3J.png) - **Status:** Indicate whether the SIP account is registered or not. - **Account:** Choose the account for configuration. - **Display Label:** The label of the device. - **Display Name:** The designation for Account 1 or 2 to be shown on the device itself on the calling screen. - **Register Name:** Same as the username from the PBX server. - **Username:** Same as the username from the PBX server for authentication. - **Password:** Same as the password from the PBX server for authentication. ### SIP Server Configuration SIP servers enable devices to establish and manage call sessions with other intercom devices using the SIP protocol. They can be third-party servers or built-in PBX in Akuvox indoor monitor. Set it up on the **Account > Basic** interface. ![图片.png](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/%E5%9B%BE%E7%89%87-WBNNMNSH.png) - **SIP Server Address**: Enter the server’s IP address or its domain name. - **SIP Server Port**: Specify the SIP server port for data transmission. - **Registration Period**: Define the time limit for SIP account registration. Automatic re-registration will initiate if the account registration fails within this specified period. ### Outbound Proxy Server An outbound proxy server receives and forwards all requests the designated server. It is an optional configuration, but if set it up, all future SIP requests get sent there in the first instance. To set it up, navigate to **Account > Basic** interface. ![图片.png](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/%E5%9B%BE%E7%89%87-3HWKFG6T.png) - **Preferred Outbound Proxy Server**: Enter the SIP proxy IP address. - **Preferred Outbound Proxy Server Port**: Set the port for establishing a call session via the outbound proxy server. - **Backup Outbound Proxy Server**: Enter the SIP proxy IP address to be used when the main proxy malfunctions. - **Backup Outbound Proxy Server Port:** Set the proxy port for establishing a call session via the backup outbound proxy server. ### SIP Call DND & Return Code Configuration The Do Not Disturb(**DND**) feature prevents unwanted incoming SIP calls, ensuring uninterrupted focus. It also allows you to set a code to be sent to the SIP server when rejecting a call. Set it up on the **Phone > Call Feature** interface. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-NIP31OI4.png) - **DND**: Check **Whole Day** or **Schedule** to enable the DND function. The DND function is disabled by default. - **Schedule**: Determine the DND period by selecting DND Start Time and DND End Time. - **Return Code When DND**: Specify the code sent to the caller via the SIP server when rejecting an incoming call in DND mode. ### SIP Hacking Protection Internet phone eavesdropping is a network attack that allows unauthorized parties to intercept and access the content of the communication sessions between intercom users. This can expose sensitive and confidential information to the attackers. SIP hacking protection is a technique that secures SIP calls from being compromised on the Internet. Set it up on the **Account > Advanced** interface. ![图片.png](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/%E5%9B%BE%E7%89%87-WSVYUHY5.png) - **Prevent SIP Hacking:** Activate this feature to only receive calls from [contacts](/v1/docs/contacts-management) in the whitelist. This protects users’ private and secret information from potential hackers during SIP calls. ## Data Transmission Type Akuvox intercom devices support four data transmission protocols: **User Datagram Protocol(UDP)**, **Transmission Control Protocol(TCP**), **Transport Layer Security**(**TLS**), and **DNS-SRV**. To set it up, go to the web **Account > Basic** interface. ![图片.png](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/%E5%9B%BE%E7%89%87-0HM6JZNJ.png) - **UDP:** An unreliable but very efficient transport layer protocol. It is the default transport protocol. - **TCP:** A less efficient but reliable transport layer protocol. - **TLS:** An encrypted and secured transport layer protocol. Select this option if you wish to encrypt the SIP messages for enhanced security or if the other party’s server uses TLS. To use it, you need to upload certificates for authentication. - **DNS-SRV**: A DNS service record defines the location of servers. This record includes the hostname and port number of the server, as well as the priority and weight values that determine the order and frequency of using the server.