Compare

1E1/T1 and 30 SIP channels, 2E1/T1 and 60 SIP channels, 4E1/T1 and 120 SIP channels

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Coder support: G.711A,G.711U, G.729 A/B,GSM, iLBC, RFC 2833,RF 3261,SIPINFO,INBOUND, Comfort noise generation, Compliant with TCP/UDP, HTTP, ARP/RARP,DNS,NTP,TFTP,TELNET,STUN and more IP protocols, Digit transmission via RFC 2833 (SIP), Echo cancellation: G.168 128 ms tail length, Hosted NAT, T.38 real-time fax, T.38 – G.711 interworking, Voice activity detection and packet loss concealment

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Network Time Protocol (NTP), SNMP MIBs, Web User Interface (WebUI) supports configuration via browser

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AC Power Supply Range 100 – 240 VAC, The power supply will operate at frequencies between 47 Hz and 63 Hz

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30 – 120 TDM channels per 1U shelf, 30 – 120 VoIP channels per 1U shelf

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IP Dual redundant 2 – 100/1000 Base-T Ethernet for VoIP payload and signaling

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4 SS7 links in standalone configuration, ISDN PRI, ISDN/SS7, SS7 ISUP, SS7 TCAP

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Core SIP Specifications and Notable Extensions, RFC 3261 SIP Basic, RFC 3262 SIP PRACK, RFC 3265 SIP Subscribe/Notify

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IP and ISUP interworking and more, RFC 3398 ISUP/SIP Mapping, RFC 3711 SRTP (for SIP), Tel URI – RFC 3966

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3 Years From Manufacturer

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Synway

Grandstream

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GXP 1625

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Hold, transfer, forward (unconditional/no-answer/busy), 3-way conferencing, call park/pickup, downloadable phone book (XML, LDAP, up to 500
items), call waiting, call history (up to 200 records), off-hook auto dial, auto
answer, click-to-dial, flexible dial plan, hot desking, personalized music
ringtones, server redundancy & fail-over

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SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS (A
record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDPMED, LDAP, TR-069, 802.1x, TLS, SRTP

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User and administrator level access control, MD5 and MD5-sess based
authentication, 256-bit AES encrypted configuration file, TLS, SRTP, HTTPS, 802.1x media access control

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2 line keys with dual-color LED and 2 SIP accounts. 3 XML programmable
context sensitive soft keys. 5 (navigation, menu) keys. 13 dedicated function
keys for MUTE, HEADSET, TRANSFER, CONFERENCE, SEND and
REDIAL, SPEAKERPHONE, VOLUME

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Support for G.711µ/a, G.722 (wide-band), G.723 (pending), G.726-32, G.729
A/B, in-band and out-of-band DTMF (In audio, RFC2833, SIP INFO)

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English, German, Italian, French, Spanish, Portuguese, Russian, Croatian, simplified and traditional Chinese, Korean, Japanese and more

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FCC: Part 15 (CFR 47) Class BCE : EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, EN60950-1RCM: AS/ACIF S004; AS/NZS CISPR22/24; AS/NZS
60950; AS/NZS 60950.1