3Com® VCX V7111 VoIP Gateway User Guide 391V7111 24 PORT SpecificationsTable 102 V7111 24 PORT Functional SpecificationsChannel CapacityAvailable Ports V7111 24 PORT 24 portsFXS FunctionalityShort or Long Haul (Automatic Detection):REN2: Up to 15.5 km (50,800 feet) using 24 AWG line.REN3: Up to 9 km (30,000 feet) using 24 AWG line.REN5: Up to 5.5 km (18,000 feet) using 24 AWG line.The lines were tested under the following conditions: ring voltagegreater than 32 Vrms, offhook loop current greater than 20 mA (alllines ring simultaneously).Includes lightning and high voltage protection for outdoor operation.Caller ID generation: Bellcore GR-30-CORE Type 1 using Bell 202 FSKmodulation, ETSI Type 1, NTT, Denmark, India, Brazil, British and DTMF ETSICID (ETS 300-659-1).Programmable Line Characteristics: Battery feed, line current, hook thresholds,AC impedance matching, hybrid balance, Tx & Rx frequency response, Tx &Rx Gains.For a specific coefficient file contact 3Com.Programmable ringing signal. Up to three cadences and frequency 15 to 200Hz.Over-temperature protection for abnormal situations as shorted lines.FXS CapabilitiesLoop-backs for testing and maintenance.Additional FeaturesPolarity Reversal / Wink Immediate or smooth to prevent erroneous ringingMetering Tones 12/16 KHz sinusoidal burstsDistinctive Ringing By frequency (15-100 Hz) and cadence patternsMessage WaitingIndicationDC voltage generation (TIA/EIA-464-B), V23 FSK data, Stutter dial tone andDTMF based.Voice & Tone CharacteristicsVoice CompressionG.711 PCM at 64 kbps μ-law/A-law (10, 20, 30, 40, 50, 60, 80, 100,120 msec)G.723.1 V7111-MLQ at 5.3 or 6.3 kbps (30, 60, 90 msec)G.726 at 32 kbps ADPCM (10, 20, 30, 40, 50, 60, 80, 100,120 msec)G.729 CS-ACELP 8 Kbps Annex A / B (10, 20, 30, 40, 50, 60 msec)
