Zhone 2000 ユーザーガイド

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PPENDIX
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PECIFICATIONS
T1/E1 (2208/2208s)
Voice Features
Analog Voice
Voice Ports:
8 POTS ports (RJ11)
Failover:
Analog input fail over to Line 1 (RJ11)
Signaling:
Loop start, ground start
Dialing:
DTMF (tone), Pulse
Ring Source:
Internal 
Impedance:
600 or 900 
Ω or complex impedance
REN:
5 REN per port, 16 REN total
Loop Current:
20, 24 mA typical (country-specific)
Idle State Voltage:
−48 V typical
Ring Voltage:
Balanced 65 V rms 
± 5% at 5 REN load
Ring Frequency:
20, 25, 50 Hz (country-specific)
Gain/System Loss:
Programmable, +3 to 
−9 dB
Digital Voice
Compression for non “s” Units:
G.711 (64 kbps PCM), G.726 (32 kbps 
ADPCM)
Compression for “s” Units (VoIP):
G.711 (64 kbps PCM), G.726 (32 kbps 
ADPCM), G.729a (8 kbps CS-ACELP)
Encoding:
A-law, 
µ-law
Echo Cancellation:
G.168 compliant (single reflector)
Protocol Support:
CopperCom, ELCP (af-vmoa=0145), 
Jetstream, LES (af-vmoa-0145), MGCP 
and SIP (s-version only)
DID/DOD Support
Fax Support:
V.17, V.29 support