TA S2M PCM Part no.: 410225 (3,3V) primary rate module (30 channels, S2M / E1) 81 mm (L) x 37.8 mm (W) x 12.9 mm (H) D channel protocol: DSS1, leased line mode Point-to-Point access including Direct Dial In support (DDI) PCM bus for external codecs / signal processors power supply: 3.3 V / 136 mA Automatic A-law / mu-law conversion on request. Evaluation Kits: Part no.: 450752 (3,3V) More information: Documentation Downloads