Zhone 2000 ユーザーガイド
224
2 0 0 0 - A 2 - G B 2 3 - 0 0
SDSL (2304/2304s and 2308/2308s)
Voice Features
Analog Voice
Voice Ports:
4 or 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)
ADPCM)
Compression for “s” Units (VoIP):
G.711 (64 kbps PCM), G.726 (32 kbps
ADPCM), G.729a (8 kbps CS-ACELP)
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,
SIP (s-version only)
Jetstream, LES (af-vmoa-0145), MGCP,
SIP (s-version only)
DID/DOD Support
Fax Support:
Fax Support:
V.17, V.29 support
Modem Support:
V.34, V.90 support
Calling Features:
Caller ID, flash hook, distinctive ring,
stutter dial tone, call forwarding, call
waiting
stutter dial tone, call forwarding, call
waiting
Cell Delay Variation Buffer:
Configurable 0
− 30 ms
Data Features
LAN Interface:
10/100Base-T (RJ45)
Bridging:
IEE 802.1d including spanning tree
Routing:
Default, Static, RIP1 (RFC 1058), RIP2
(RFC 2453), ICMP for IP Packet
Processing
(RFC 2453), ICMP for IP Packet
Processing