Compare

32 Port, 4 Port, 8 Port, 16 Port

24 Port, 50 Port, 8 Port

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Amount: 2 (10/100 BASE-TX (RJ-45)), Auto MDI/MDIX supported, Self-adaptive bandwidth supported

1000BaseT / 100BaseTx / 10BaseT, full / half duplex, 1x RJ-45 Gigabit Ethernet

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CDMA: 800Mhz, GSM: 850/900/1800/1900MHz, SMS CODEC: ASCII/UCS2, UMTS: 850/900/1900/2100Mhz

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3 Years From Manufacturer

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FXO, FXS

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G.711A 64 kbps, G.711U 64 kbps, G.723 5.3/6.3 kbps, G.726, G.729a (8kbps), T.38

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24 FXS ports on an RJ-21 connector, 600R, 900R or CTR-21 line impedance

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Message waiting indicator – audible, visual, Call forward – unconditional, busy, no-answer, Call transfer – blind, consultative, Call Waiting, Caller ID, Do Not Disturb, Music on hold, Three Way Calling

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Dial planner – sophisticated call routing capabilities, standalone or gatekeeper/proxy integration, Direct Dialing In (DDI), SIP registration to multiple proxies

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Sangoma

Grandstream

Grandstream

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GXP 1625

GXP 2135

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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

Hold, transfer, forward, 4-way conference, call park, call pickup, shared-callappearance
(SCA)/bridged-line-appearance(BLA), downloadable phonebook
(XML, LDAP, up to 2000 items), call waiting, call log (up to 500 records), XML
customization of screen, off-hook auto dial, auto answer, click-to-dial, flexible
dial plan, hot desking, personalized music ringtones and music on hold, server redundancy and 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

User and administrator level passwords, MD5 and MD5-sess based
authentication, 256-bit AES encrypted configuration file, SRTP, TLS, 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

8 line keys with up to 4 SIP accounts, 4 XML programmable context sensitive
softkeys, 5 navigation/menu keys, 11 dedicated function keys for :
MESSAGE (with LED indicator), PHONEBOOK, TRANSFER, CONFERENCE, HOLD, HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE, VOL+, VOL

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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

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

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Yes, HD handset and speakerphone with support for wideband audio

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g Firmware upgrade via TFTP / HTTP / HTTPS, mass provisioning using TR-069 or AES encrypted XML configuration file