l  Modularization system design, supporting the smooth linear expansion;

l  Support a maximum of 16 device stacking, for 30,000 line non-blocking exchange;

l  System monitoring and alarms for chassis temperature, fan rotating speed, and power states;

l  High reliability: port redundancy, board redundancy, power redundancy, power input redundancy, and hot standby;

l  Cooling design:

The signal processing module and power module have respective cooling passages;

Silence fan with large exhaust, forced air cooling;

Fan near the heat radiation circuits, bringing the most heat off effectively;

Minimum air resistance design in chassis;

Each power module has two respective fans;

Anti-Dust filter mesh to avoid dusts.

l  EMC

   The air ventilator adopts regular hexagon cellular design which circumcircle diameter is 5 mm, which also screens the electromagnetism effectively under the premise of cooling the device;

     The chassis adopts metal plates, and the contacted surfaces are not sprayed to ensure the electromagnetic shielding effect;

   The elastic conductive fabric is installed in the cable outlet to make up the cable gaps, which can prevent the tiny electromagnetic penetrating;

   In the gap, the screening reed in beryllium bronze is installed, not only ensuring the elasticity, but also possessing shielding effect;

    The power input/output adds the filter circuit.

l  Maintenance

    The rear side uses the bevel, convenient for handling wires;

    Only by hand, you could operate on the device, which shortens the maintenance time. 

4 slots

l 3 service slots

A maximum of 3 common signaling processing boards can be inserted (16 E1s for each board);

A maximum of 3 analog interface boards can be inserted (30 channels for each board)

A maximum of 3 digital phone recording boards can be inserted (30 channels for each board);

A maximum of 1 fiber channel exchange matrix board can be inserted.

l 1 exchange control slot

A maximum of 1 network exchange board can be inserted;

A maximum of 1 fiber channel exchange matrix board can be inserted.

2 power module slots

A maximum of 2 device system power modules can be inserted;

A maximum of 1 ring power module can be inserted.

Capacity

l A maximum of 48 E1 digital trunk interfaces can be configured;

l A maximum of 90 analog agents can be configured;

l A standalone Keygoe3003 can provide a maximum of 1440 voice resources;

l A maximum of 96 SS7 links (64 kbps) can be provided;

l A maximum of 12 SS7 links (2Mbps) can be provided;

l A maximum of 24 SS7 links (2Mbps in high-impedance monitoring mode) can be provided;

l A standalone Keygoe3003 can provide a maximum of 1440 VoIP resources;

l A standalone Keygoe3003 can provide a maximum of 768 conferences with 1440 members in conference simultaneously;

l A maximum of 360 fax resources can be provided;

l A maximum of 90 recording resources for digital phones can be provided;

l A maximum of 180 3G video resources can be provided.

Stacking count

l 16

Size

l Height: 130.5 mm (3U); width: 482.6 mm (19″); depth: 430 mm.

Power

l AC: 220VAC (range: 176–264 VAC ); frequency: 50 Hz;

l DC: -48V (range: -36V–-72V ).

Extensibility

l The port number can be increased linearly;

l Support the device stacking;

l Support the functional board hot swapping, and online extension.

System monitoring alarm

l Chassis temperature;

l Fan rotating speed;

l Power state.

Cooling system design

l High-Efficient cooling passage design;

l 3 cooling fans in low noise with large exhaust.

System redundancy

l 2 main power hot standby;

l Dual-Power inputs redundancy;

l Network exchange board interface redundancy;

l Hot standby for control server.

TDM interface and protocol

A) TDM interface

l Support the mixed configuration of digital interfaces and analog interfaces;

l Support the high-impedance recording and digital recording; 

l Conform to the G.703, and support the coaxial cable (75 Ω unbalanced), twisted-pair cable (120 Ω balanced);

l Conform to the frame structure of G.704 and multiframe alignment of G.706;

l The 2048 kbps PCM confirms to the G.732 and G.796;

l The alarm conforms to the G.775;

l Support power fault alarming;

l The jitter buffer conforms to the G.823;

l The analog interface supports the analog trunk, analog user, analog high impedance, analog 2-line voice, analog 4-line voice, EM control, magneto telephone, 2B+D high-impedance, and so on.

B) Optical interface

l Each optical interface rate: 155.52 Mbit/s;

l Type: S1.1/L1.1/L1.2, confirming to the ITU-T G.957;

l Connector type: LC;

l Security: ITU-T G.664;

l Jitter buffer: The input/output jitter buffer confirms to the ITU-T G.825 and G.813.

C) SS7

l Conform to the ITU-T signaling system No.7, including the Q.700-Q.716, Q.721-Q.766, and Q.771-Q.795;

l Maximum message processing ability for each link: 500 MSU/s;

l Each link busy-hour call attempts (BHCA): 360 k;

l Support the MTP, TUP, ISUP, SCCP, and M3UA signaling function;

l Support the 64 kbps standard link and 2 Mbps high-speed link (monitoring);

l Support the 14/24-bit point codes;

l Support the traffic balancing between the links and link groups;

l Support the link switch and switch back in a link group;

l Support multiple OPCs (originating point codes) and DPCs(destination point codes);

l Support to dynamically add, delete, activate, recover, deactivate, normally restart, urgently restart signaling and to process signaling congestion.

D) ISDN PRI

l Conform to ITU-T Q.921 LAPD;

l Conform to ITU-T Q.931 ISDN PRI; European ISDN ETSI NET5;

l Support the network side and client side;

l Support the overlapping mode when receiving and sending called numbers.

IP interface and protocol

A) Network exchange interface

l TCP/IP 1000BASE-T port (RJ45).

SNMP              

l Conform to the SNMPV1 and SNMPV2.

B) RTP

l Conform to the RTP/RTCP (RFC3551/3552);

l Voice packet sampling length/frame number can be configured (10–60 ms);

l Dynamic DTMF load of the RTP (RFC2833/4733);

l Jitter buffer: Support the static jitter mode and dynamic self-adaptation mode simultaneously;

l Analyze the network environment and make the statistics of packet loss;

l Support the NAT/firewall detection and transparency.

C) H.323

l Abide by the ITU-T H.323v2 (H.225v2/H.245v3);

l Support the coding standards of G.723, G.726, and G.729;

l Support the call parameters such as the fast start and H.245 tunneling;

l Call forwarding;

l Gatekeeper auto discovery and login (Support the number registration types of H.323 UID and E164);

l H.245 user input character and DTMF signal message (User Input Indication);

l Terminal registration management.

D) SIP

l Conform to the IETF SIPv2 (RFC3261);

l UDP/TCP transmission mode;

l MD5 (digest) identity test;

l REFER call forwarding (RFC3515);

l SIP message subscription/notice (RFC3265 SUBSCRIBE/NOTIFY);

l Proxy server register, user identification, and timely refreshing;

l SIP INFO message (RFC2976);

l Registrar; support the authentication of the service part;

l Support the STUN for NAT/firewall detection and transparency.

E) Audio/Video protocols

l Audio encoding/decoding format: G.711 μlaw/A law, G.723.1, (5.3/6.3 kbps self-adaptation), and G.729A/B/AB;

l Video encoding/decoding format: H.263/H.264/MPEG4;

l Media file format: 3GP/AVI;

l Voice activity detection/Silence compression (G.723/G.729);

l Comfort noise;

l Support the video conference.

Media resource

A) Voice resource

l Voice code format: Support the A law/μ law PCM, AMI-ADPCM, G729, G723.1, and so on;

l Voice file format: Support the WAVE, PCM, ADPCM, VOX, MP3, and so on;

l Support the transfer between the A law and μ law;

l Support the voice playing of the memory and file server in the real time;

l Support the recording of the file server in the real time (dynamic memory);

l Support the DTMF, FSK, R2, and tone detection of self-defined envelope;

l Support the DTMF, FSK, R2, and tone generation of self-defined envelope;

l Support the mixed voice recording and playing;

l Support the echo canceling (128 ms);

l Support the AGC/ALS;

l Support the voice recording and playing in a full duplex mode;

l Support the VAD and CNG;

l Support the DPD and PVD.

B) Fax resource

l Support the V17/V29/V27 with the rates of 14400/9600/7200/4800/2400bps; support the automatic down speeding;

l Support the T.30 and T.38;

l Support to receive/send fax in an ECM mode, selecting ECM/NON-ECM mode automatically;

l Support to input the .tiff file using the MR, MH, and MMR; support to send/receive files using the MH.

C) 3G-324M video resource

l Video encoding: H.263/MPEG4;

l Audio encoding: AMR, G.723.1;

l Signaling control protocol: H.245;

l Multiplexing protocol: H.223;

l Media file format: 3GP/AVI.

D) Host video transcoding resource

l Video encoding/decoding: H.263/H.264/MPEG4;

l Support the video conference.

Application development:

l Operating systems: Windows2000/XP/2003/Vista;

   Windows 7 Ultimate (32/64 bits );

   Windows Server R2 (32/64 bits );

                                        Linux (2.6 or later);

l Development language: ANSI C/C++, Microsoft Visual C++, C#, Delphi;

l Development platform: Keygoe SDK V2.2.0 or later.

Environment parameters

l Temperature: 0°C–40°C;

l Relative humidity: 10%–85%;

l Air cleanliness: For the dust particle which diameter is more than 0.5 μm, the density cannot be over 3500 particles per litre. For the dust particle which diameter is more than 5 μm, the density cannot be over 30 particles per litre. Avoid excessive dusts, velvet, carbon granules,  paper fiber things, and metal things;

l Electromagnetic environment: Electric field strength≤130 dB (μV/m ), magnetic field strength≤800 A/m;

l Anti-Static: The device is grounded reliably.

Grounding requirement

l The grounding resistance cannot be over 1.5 Ω.

Installation:

l Installed in a standard 19" rack;

l The rack need be fixed to the floor;

l The front board or middle part of the rack need be fixed. 

l Voice services: IVR, telephone conferencing, color ring back tone (CRBT), background music, and telephone recording;

l Video services: multimedia CRBT, video telephone, video conference, video mail, 3G video, and video monitoring;

l Signaling services: virtual telephone exchange, signaling gateway, missed call service for fixed lines, integrated access gateway, media gateway, and mobile positioning;

l Integrated services: VoIP, unified messaging, Internet faxing, integrated QQ, and mobile payment;

l Call control services: pre-payment, post-payment, intelligent public telephone, and callback;

l Next-generation network: multimedia resource server;

l Call center: automatic voice playing, conference recording, IP agent, remote agent, video application, Web800, calling out, and automatic callback.