| Specifications |
| Data Networking | ● MAC address (IEEE 802.3)
● IPv4 (RFC 791), upgradable to v6 (RFC 1883)
● Address Resolution Protocol (ARP)
● DNS A record (RFC 1706), SRV record (RFC 2782)
● Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
● DHCP server (RFC 2131)
● Point-to-Point Protocol over Ethernet (PPoE) client (RFC 2516)
● Internet Control Message Protocol (ICMP) (RFC 792)
● TCP (RFC 793)
● User Datagram Protocol (UDP) (RFC 768)
● Real Time Protocol (RTP) (RFC 1889, 1890)
● Real Time Control Protocol (RTCP) (RFC 1889)
● Differentiated Services (DiffServ) (RFC 2475), type of service (ToS) (RFC 791, 1349)
● VLAN tagging (IEEE 802.1p)
● Simple Network Time Protocol (SNTP) (RFC 2030)
● Upload data rate limiting-static and automatic
● Quality of service (QoS)-voice packet prioritization over other packet types
● MAC address cloning
● Port forwarding
● Session Initiation Protocol (SIP) channels support both UDP and TCP transport
● VPN pass-through with IP Security encapsulating security payload (IPsec ESP), Point-to-Point Tunneling Protocol (PPTP), and Layer 2 Tunneling Protocol (L2TP) | ● MAC address (IEEE 802.3)
● IPv4 (RFC 791)
● Address Resolution Protocol (ARP)
● DNS A record (RFC 1706), SRV record (RFC 2782)
● Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
● DHCP server (RFC 2131)
● Point-to-Point Protocol over Ethernet (PPoE) client (RFC 2516)
● Internet Control Message Protocol (ICMP) (RFC 792)
● Transport Control Protocol (TCP) (RFC 793)
● User Datagram Protocol (UDP) (RFC 768)
● Real Time Protocol (RTP) (RFC 1889, 1890)
● Real Time Control Protocol (RTCP) (RFC 1889)
● Differentiated Services (DiffServ) (RFC 2475), type of service (ToS) (RFC 791, 1349)
● VLAN tagging (IEEE 802.1p)
● Simple Network Time Protocol (SNTP) (RFC 2030)
● Upload data rate limiting: static and automatic
● Quality of service (QoS): voice packet prioritization over other packet types
● MAC address cloning
● Port forwarding
● SIP channels support both User Datagram Protocol (UDP) and TCP transport
● VPN pass-through with IP Security encapsulating security payload (IPsec ESP), Point-to-Point Tunneling Protocol (PPTP), and Layer 2 Tunneling Protocol (L2TP) |
| Voice Gateway | ● SIP v2 (RFC 3261, 3262, 3263, 3264)
◦ SIP proxy redundancy-dynamic via DNS SRV, A records
◦ Reregistration with primary SIP proxy server
● SIP support in Network Address Translation (NAT) networks (including Serial Tunnel [STUN])
● Secure (encrypted) calling via prestandard implementation of Secure RTP
● Codec name assignment
◦ G.711 (a-law and µ-law)
◦ G.726 (16/24/32/40 kbps)
◦ G.729 A
◦ G.723.1 (6.3 kbps, 5.3 kbps)
● Dynamic payload
● Adjustable audio frames per packet
● Fax tone detection pass-through
● Fax pass-though (using G.711)
● Dual-tone multifrequency (DTMF): in-band and out-of-band (RFC 2833) (SIP info)
● Flexible dial plan support with interdigit timers and IP dialing
● Call progress tone generation
● Jitter buffer-adaptive
● Frame loss concealment
● Full-duplex audio
● Echo cancellation (G.165/G.168)
● Voice activity detection (VAD) with silence suppression
● Comfort noise generation (CNG)
● QoS (Ethernet port upstream bandwidth control, physical port, MAC address, application)
● Attenuation/gain adjustments
● Flash hook timer
● Message waiting indicator (MWI) tones
● Visual message waiting indicator (VMWI) via frequency shift keying (FSK)
● Polarity control
● Hook flash event signaling
● Caller ID generation (name and number)-Bellcore, DTMF, European Telecommunications Standards Institute (ETSI)
● Music on hold client
● Streaming audio server-up to 10 sessions
● System dial-on-demand routing (DDR) synchronous dynamic RAM (SDRAM)-16 MB
● System flash ROM-4 MB | ● SIP version 2
● Dual-tone multifrequency (DTMF) tone detection and generation
● Voice Activity Detection (VAD)
● Comfort Noise Generation (CNG) compatible
● Silence suppression
● Call waiting, call waiting caller ID (FXS ports only)
● Caller ID with name/ number
● Caller ID blocking
● Call forwarding: no answer, busy, all
● Do not disturb
● Call transfer, call return, call back on busy
● Fax: G.711 pass-through or real-time fax over IP via T.38 fax relay
(T.38 support is dependent on fax machine and network/transport resilience)
● Supports multiple voice codecs: G.711a, G.711u, G.726, G.729A, G.723.1
● SIP over TLS
● Three-way conference calling with local mixing
● Per-call authentication and associated routing
● Call blocking with toll restriction
● Delayed disconnect
● Distinctive ringing: calling and called number
● Off-hook warning tone
● Selective/anonymous call rejection
● VoIP to PSTN (USA) service call origination and termination
● PSTN (USA) to VoIP service call origination and termination
● Forward calls to VoIP service: selective, authenticated, all
● Forward calls to PSTN service: selective, authenticated, all
● Automatic PSTN fallback (loss of power or IP service to unit, with quiescence to normal operations): fixed fallback pairing of FXS ports to FXO ports
● Advanced inbound and outbound call routing
● Independent configurable dial plans (1 per port)
● Force PSTN disconnection |
| Physical interfaces | ● 8-port standard FXS voice ports (RJ-11)
● RJ-21 (50-pin telco connector) multiport voice connection
● 1 WAN 100BASE-T RJ-45 Ethernet Port (IEEE 802.3)
● Reset button | ● 4 RJ-11 FXS phone ports for analog circuit telephone device(s) (tip/ring)
● 4 RJ-11 FXO line ports for telco or PABX or KTS connection(s)
● RJ-21 (50-pin telco connector) multiport voice connection
● 1 WAN 100BASE-T RJ-45 Ethernet port (IEEE 802.3)
● 1 AUX 100BASE-T RJ-45 Ethernet port (IEEE 802.3) for Maintenance |
| Subscriber line interface circuit (SLIC) | ● Ring voltage: 40–90 Vpk configurable
● Ring frequency: 20–25 Hz
● Ring waveform: trapezoidal
● Maximum ringer load: 5 ringer equivalence numbers (RENs)
● On-hook/off-hook characteristics:
◦ On-hook voltage (tip/ring): -46 ~ -56V
◦ Off-hook current: 18–25 mA
◦ Terminating impedance: 600 ohm resistive or 270 ohm + 750 ohm
● 150 nF complex impedance
● Frequency response 300–3400 Hz
● Return loss (600 ohm, 300–3400 Hz) up to 20 dB
● Insertion loss (1 Vrms at 1 kHz) 3–4 dB
● Total harmonic distortion (THD) (350 mV peak at 300 Hz) up to 3%
● Idle channel noise-72 dB (typical)
● Longitudinal balance 55 dB (typical)
● Off-hook threshold (line seizure) Rdc < 1000 ohm
● On-hook threshold (line release) Rdc >10000 ohm
● Rdc DC supervisory range Rdc > 450 ohm | ● Ring voltage: 40–90 Vpk configurable
● Ring frequency: 20–25 Hz
● Ring waveform: trapezoidal
● Maximum ringer load: 5 ringer equivalence numbers (RENs)
● On-hook/off-hook characteristics:
● On-hook voltage (tip/ring): -46 ~ -56V
● Off-hook current: 18–20 mA
● Terminating impedance: 600 ohm resistive or 270 ohm + 750 ohm
● 150 nF complex impedance
● Frequency response 300–3400 Hz
● Return loss (600 ohm, 300–3400 Hz) up to 20 dB
● Insertion loss (1 Vrms at 1 kHz) 3–4 dB
● Total harmonic distortion (THD) (350 mV peak at 300 Hz) up to 3%
● Idle channel noise 72 dB (typical)
● Longitudinal balance 55 dB (typical)
● Off-hook threshold (line seizure) Rdc < 1000 ohm
● On-hook threshold (line release) Rdc >10000 ohm
● Rdc DC supervisory range Rdc > 450 ohm |
| Regulatory compliance | FCC (Part 15 Class B), CE, ICES-003, C-Tick certification, Restriction of Hazardous Substances (RoHS), UL | ● IEC 60950-1:2005, Second Edition, with all country deviations
● AS/NZS 60950-1:2003, First Edition
● CAN/CSA 22.2 No. 60950-1-05, Second Edition
● UL 60950-1, Second Edition, 2005
● EN55024
● AS/NRZ 3548:1992 Class A
● CFR 47 Part 15 Class A
● EN55022 Class A
● ICES-003, Issue 2, Class A, April 1997
● Industry Canada CS-03
● TIA-968-A, Addendum 1, 2, 3, 4, 5
● TBR21: January 1998
● Australia AS/ACIF S002: 2005
● Australia AS/ACIF S003: 2008
● New Zealand PTC220: 2008 |
| Power supply
| ● Switching type (100–240V) automatic
● DC input voltage: 12V DC at 3.0A max.
● Power adapter: 100–240V, 50–60 Hz AC input | ● Switching type (100–240V) automatic
● DC input voltage: 12V DC at 3.0A max.
● Power adapter: 100–240V, 50–60 Hz AC input |
| LEDs | Power, Ethernet, Voice Status, Phone 1 through 8
| ● Power, Ethernet, Voice Status, Phone 1 through 4, Line 1 through 4 |
| Environmental |
| Dimensions (W x H x D) | 6.69 x 1.54 x 8.66 in.
(170 x 39 x 220 mm) | 6.69 x 1.54 x 8.66 in.
(170 x 39 x 220 mm) |
| Unit weight | 2.85 lb (1.30 kg) | 2.85 lb (1.30 kg) |
| Operating temperature | 32° to 113°F (0° to 45°C) | 32° to 113°F (0° to 45°C) |
| Storage temperature | -13° to 185°F (-20° to 85°C) | –13° to 185°F (–20° to 85°C) |
| Operating humidity | 10% to 90% noncondensing, operating and nonoperating | 10% to 90% noncondensing |
| Storage humidity | 10% to 90% noncondensing, operating and nonoperating | 10% to 90% noncondensing |
