# Technical References - [SIP Trunk Requirements: Ports, Protocols, and Codecs](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/sip-trunk-requirements-ports-protocols-and-codecs.md): This article outlines the essential requirements for SIP trunks - [How much bandwidth do I need for VoIP?](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/how-much-bandwidth-do-i-need-for-voip.md) - [Grandstream Device Management System (GDMS)](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/grandstream-management-portal.md) - [How to login to the GDMS platform](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/grandstream-management-portal/how-to-login-to-the-gdms-platform.md): This is article covers how to log in using your GDMS account - [How to run diagnostic tests within the GDMS](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/grandstream-management-portal/how-to-run-diagnostics-on-phone-in-gdms.md): This article runs through some of the diagnostic capabilities of the Grandstream Device Management System and how to access them. - [How to add a site and move a VoIP Device into it](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/grandstream-management-portal/how-to-add-a-site-and-move-a-phone-into-it.md): This article goes over how you can add a site to the GDMS platform and move a VoIP device into it, essentially associating it with a customer - [How do I add/remove users from the GDMS Portal?](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/grandstream-management-portal/how-to-get-a-new-user-added-to-the-portal.md): This article covers how partners can give additional users access to the GDMS to manage the phones and carry out troubleshooting - [Best Practice Guidelines](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/best-practice-guidlines.md): Guidelines on how to improve the uptime/stability of their services by implementing redundant links and failover options. - [Best Practices to Protect You from Toll Fraud](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/best-practices-to-protect-you-from-toll-fraud.md): This page provides information on how to prevent toll fraud - [Brand Specific Guides](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides.md): This section contains guides and information for the various SIP Phone brands. - [NetComm Router/ATA](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/netcomm-router-ata.md) - [How to register VOIPnow extension to NetComm device (NL1901ACV)](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/netcomm-router-ata/how-to-register-voipnow-extension-to-netcomm-device-nl1901acv.md): This article covers how to configure NetComm devices - [Cisco](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/cisco.md) - [SPA112 - Fax Settings](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/cisco/spa112-fax-settings.md) - [Grandstream](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets.md): Hosted Network supply Grandstream handsets with our VoIP Bundles, you may find the following manuals useful. - [How to enable TLS encryption on Grandstream phone](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/how-to-enable-tls-encryption-on-grandstream-phone.md): This article covers how to configure TLS on your Grandstream Phones - [Upgrading the firmware on Grandsteam phones](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/upgrading-the-firmware-on-grandsteam-phones.md) - [Setting up voicemail on the DP720 (Cordless Handset)](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/setting-up-voicemail-on-the-dp720-cordless-handset.md): This article covers the setup of voicemail on the DP720 cordless handset. - [How to setup a VoIP Account on a Grandstream phone](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/how-to-setup-a-voip-account-on-a-grandstream-phone.md): A guide on how to setup a Hosted Network VoIP Extension on a Grandstream phone. - [Grandstream GXP2140 Voicemail](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/grandstream-gxp2140-voicemail.md) - [Setting up Monitored Call Parking](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/brand-specific-guides/grandstream-handsets/setting-up-monitored-call-parking.md) - [Managing Call Diversions for DID Numbers (AudioCodes SIP Trunks)](https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references/managing-call-diversions-for-did-numbers-audiocodes-sip-trunks.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://kb.hostednetwork.com.au/support/services/voice-over-ip-voip/technical-references.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.