Main Function:

System capacity:4 Co lines and 16 Exts, cann’t expand.

Key phone:can be connect with 4PCS 4-core key phone.

VOIP voice channel number: 4 rount (between TDM and IP voice channels)

Number of IP concurrent:20

Number of SIP trunk:Can support 4 rount SIP trunk

 Number of SIP user:50(Use indefinitely)

performance parameter 

IP platform: LINUX embedded system and ASTERISK platform

IP standard:SIP2.0

IP Speech coding; PCMU/PCMA/G.729/iLBC/GSM

Busy tone of Co Line detection:5S

Dial-up decoding: The whole machine Shared 4 rount

Outgoing message:75S(6 section)

Exts lines with Caller ID display:DTMF

Co lines with Caller ID display:  DTMF/FSK(nosie<-30dB)

Dial mode: Double Audio Frequency

Hold/ music on hold: Outside line

The billing interface:Support

Crosstalk attenuation>70dB

Exts failure time effectively:80mS-800mS

Through the blackout:one rount,COL01 pass EXT08

Conference:2 groups(8 party or 3 party)

Leading Extension number: Support 1-8 full flexible

Detail Picture  

        Shenzhen Guowei Cesller Technology Co.,Ltd,specialized in manufacturing group phone system products and communication equipment.Cesller is a high-tech enterprise whose headquarter lies in Canada. It is a diversified company setting design research and products development as a leader,including production, sales and service.