1. Network configuration
The following configuration is required for communication between the TAPI server and TAPI client.
Windows Client – Outgoing rules
Rule name Protocol Port(s) Destination Purpose:
Allow RPC Endpoint Mapper TCP 135 Telephony Server IP RPC Service Discovery
Allow SMB TCP 445 Telephony Server IP access to named pipes, files
Allow RPC Dynamic Ports TCP 49152-65535 Telephony Server IP RPC communication to TAPI services
Telephony Server – Incoming rules
Rule name Protocol Port(s) Source Purpose:
Allow RPC Endpoint Mapper TCP 135 Client Subnet IPs RPC Service Discovery
Allow SMB TCP 445 Client Subnet IPs access to named pipes, files
Allow RPC Dynamic Ports TCP 49152-65535 Client Subnet IPs RPC communication to TAPI services
Telephony Server – Outgoing rules to Domain Controller
Rule Name Protocol Port(s) Destination Domain Controller IP(s) Purpose
Allow LDAP TCP 389 Domain Controller IP(s) Active Directory queries
Allow LDAP UDP 389 Domain Controller IP(s) LDAP Discovery (optional)
Allow Kerberos TCP 88 Domain Controller IP(s) authentication
Allow DNS UDP/TCP 53 DNS Server IP(s) Name resolution
Allow SMB TCP 445 Domain Controller IP(s) domain-related file and named pipe access