... Sim Card ports for GSM extensions Support G.711 A/μ law, G.729A/B, G.723.1 Codecs Support Multiple dial ... Session Initiation Protocol Call Control - Transfer Codec: G.711 (A/µ law), G.729A/B, G.723.1 DTMF: RFC 2833, In-band ... C to 50°C (32°F to 122°F)Weight:500 g (1 lb) (Including AC/DC Adapter)Size:105 mm ... mm (H) (Width x Length x HeigthPower: 12 Vdc 500 mA (AC/DC adapter included) 1 SIM Card Viop/Goip ...