Zhone 2004 ユーザーガイド

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 

Ω or Complex (country-specific) 

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

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, 
SIP (s-version only)

DID/DOD Support

Fax Support:

V.17, V.29 support

Modem Support:

V.34, V.90 support

Calling Features:

Caller ID, flash hook, three-way calling, 
distinctive ring, stutter dial tone, call 
forwarding, call waiting

Cell Delay Variation Buffer:

Configurable 0 

− 30 ms

LAN Interface: 

10/100BaseT (RJ45)

Bridging: 

IEEE 802.1d including spanning tree

Routing: 

Default, Static, RIP1 (RFC 1058), RIP2 
(RFC 2453), ICMP for IP Packet 
Processing