Forward Original Caller ID in Grandstream IP PBX UCM

Grandstream Forward Original Caller ID

Description Call forward makes the remote working solutions more efficient and ensures continuity of business operation. This article describes the settings required to allow the forwarding of the original Caller ID of external numbers in Grandstream IP PBX UCM. 1. Make sure that the UCM has the latest firmware version 2. Make sure the following settings … Read more

How to Block Ghost Calls on Grandstream IP Phones

How to Block Ghost Calls on the Phones

Description Ghost calls will usually affect the phone level. You may find it annoying by getting authorized calls. You can increase the security on the affected phone by setting the following parameter to YES in Grandstream IP Phones – GXP16XX/17XX/21XX and HT8XX ATAs models. Validate Incoming Messages Check SIP User ID for Incoming INVITE Accept … Read more

How to use Security Certificates on IP Phones – Grandstream GXP16XX/17XX/21XX

CA SSL Grandstream IP Phones

Description Upgrading the product to the latest firmware version allows the expiration date of Grandstream-authorized certificates to be adjusted automatically. Even with the certificate expired, the communication between the phones and clients might not be secure or fully encrypted but the device will still function. Downloads GEN 1 (SHA256) GEN 2 (SHA384)

How to Configure Google Authentication in Grandstream GWN Access Points

Grandstream GWN AP Captive Portal Google Auth

Description This article shows the steps on how to configure Google Authentication in Grandstream GWN Access Points. The Release Note has a typo in specifying the Oauth URL path. Add Test Users Known Issue You may hit Error 403: disallowed_useragent when trying to connect to SSID and authenticate with iPhone or iPad. This is a … Read more

How to Configure TFTPd as Syslog Utility Tool (Windows)

Configure Syslog server in Grandstream devices using TFTPD

Description Many users find it difficult to capture the Syslog from the phone or gateway devices when the issues are intermittent and difficult to replicate. Hence, you can install an external Syslog server on your machines that allow you to store and capture the phone’s Syslog the whole day. Requirements a. Windows b. Connect the … Read more

Grandstream IPPBX UCM63XX – Failed to Bind a LDAP session

Grandstream UCM IP PBX Failed to bind a LDAP Session

Description This article describes the error Failed to bind LDAP session when configuring Phonebook Download Configuration in Grandstream IPPBX UCM63XX. The example shown on the phonebook Download Configuration page is not up-to-date. To avoid the binding error in UCM63XX, make sure you fill in cn=admin,dc=pbx,dc=com in the Username field. Go back to the LDAP Phonebook … Read more

Firewall Rules in Granstream GWN 76XX Access Points

Configuring Firewall Rules in Grandstream GWN 76XX Access Points

Description This article describes how to configure Firewall Outbound or Inbound Rules in Grandstream GWN76XX Access Points to permit or deny traffic based on SSID. When creating firewall rules, make sure that you do not include the protocol in the Domain Name field. For eg. www.grandstream.com instead of https://www.grandstream.com The More You Know You may … Read more