Specifications
Ports and Interfaces:
- 24 × FXS ports (via 3 RJ21 interfaces)
- 1 × 10/100 Mbps Ethernet LAN port
VoIP Protocols:
- SIP (RFC3261), IAX2
Voice Codecs:
- G.711 A-law and µ-law, G.722, G.723, G.726, G.729A/B, GSM, Speex, ADPCM
Fax Support:
- T.38 Fax
- G.711 Pass-through
Echo Cancellation:
- ITU-T G.168 with adjustable echo tail (up to 128 ms)
DTMF Support:
- In-band
- RFC2833
- SIP INFO
Telephony Features:
- Caller ID, Call Waiting, Call Forwarding
- Call Transfer (Attended and Blind)
- Call Hold, 3-Way Conference
- Speed Dial, Hotline, Do Not Disturb
- Voicemail MWI indication
- Polarity Reversal and Busy Tone Disconnect
- Flexible Dial Plans






