Telekom Malaysia Multi Line SIP Connection to Ericsson BP250
Recently, I worked on a project where we needed to integrate a legacy Ericsson BP250 PBX with the Telekom Malaysia (TM MLS) SIP network. Since the BP250 is a TDM-based system, direct SIP connectivity is not possible. To bridge this gap, we designed a hybrid solution using a VoIP Gateway and a FreeSWITCH system. Architecture Overview The integration was built using the following components: Ericsson BP250 (Legacy PBX – E1 interface) VoIP Gateway (E1 ↔ SIP conversion) FreeSWITCH (SIP routing & header manipulation) Telekom Malaysia SIP Network (TM MLS) ...