User manual

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5. Appendix
5.1. Specification
5.1.1. Hardware
Item DW850
Adapter
(Input/Output)
Input: 100-240V
Output: 5V 1A or PoE(802.3af，optional)
port WAN 10/100Base- T RJ-45 for LAN
LAN 10/100Base- T RJ-45 for PC
Power Consumption Idle: 2.0W/Active: 2.3W
LCD Size 128*64 dot matrix LCD
Operation Temperature 0～40℃
Relative Humidity 10～65%
CPU
INFINEON (MIPS 4Kc@150MHz, DSP@100MHz)
SDRAM 128Mbits
Flash 16Mbits
Dimension(L x W x H) 235x200x81mm
Weight 2.07lb.(0.94kg)
5.1.2. Voice features
z Support SIP 2.0 (RFC3261) and correlative RFCs
z Support IAX2
z SIP supports 5 SIP servers. Can connect to 5 SIP servers at the same time
z Codec: G.711A/u, G.7231 high/low, G.729a/b，G.722
z Echo cancellation: G.168 Compliance in LEC, additional acoustic echo cancellation(AEC)
can reach 96ms max filter length in hands-free mode
z Support Voice Gain Setting, VAD, CNG
z Full duplex hands-free speakerphone
z NAT transverse: support STUN client
z SIP support SIP domain, SIP authentication(none basic, MD5), DNS name of server, Peer to
Peer/ IP call
z DTMF Relay: support inband, SIP info, RFC2833
z SIP application: SIP Call forward/transfer（alert/blind/attended）/hold/waiting/3 way
talking/push to call/paging and intercom/click to dial/telephone
exchange/sms/pickup/joincall/redial/unredial/vport
z Call control features: Flexible dial map, hotline, empty calling No. reject service, black list
for reject authenticated call, limit call, no disturb, caller ID
z Support phonebook 500 records
z Incoming calls / outgoing calls / missing calls. Each supports 100 records
z Support voice record on SIP server
z Support voice record in this phone, 20 minutes total, 5 minutes max of 3 records or 15
records max
z 9 kind of ring types and 2 user-defined music rings
z Support DNS SRV
z Support Memo
z Support Multilanguage
z Phonebook supports vcard standard
z 12/24 hours time display
z Support daylight saving time