Aethra THE VOICE ISDN Installationsanleitung PDF herunterladen (Seite 37)

APPENDIX “A” – Specifications

Technical features

Analogue lines (POTS)

Call

Insertion mode: unbalanced ⇒

⇒ Frequency : 25Hz + 2Hz

Level with Z = 2 KΩ (3,3 µF + 1000 Ω) : ≥ 40 V ⇒

⇒ Immediate call (first ring) for CLIP, CNIP and MWI services

Dialing

Pulse-dialing and tone-dialing (DTMF) ⇒

DC power supply

No load tension (I ≤ 1 mA : from 42 to 58 Vdc ⇒

⇒ Maximum current output : ≥ 22 mA with 800 Ω

Metering pulses

User-selectable, 12 or 16 kHz ⇒

Reference standard

User interface

ITU-T G.711, G.711 Appendix I (packet loss concealment) and Appendix II (comfort

noise generation)

⇒

ITU-T G.726 (ADPCM)

ITU-T G.165/G.168 (echo cancellation)

Network interface

SHDSL: TS 101 524-1 and –2 ⇒

⇒ ADSL: ITU-T G.992.1

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Aethra THE VOICE ISDN Installationsanleitung Seite 37