Altesys Micro VoIP 200 User Manual Download

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IP PBX

Micro VoIP 200

User Manual

Version 1.7

Altesys SpA

www.altesys.com

Summary of Contents for Micro VoIP 200

Page 1: ...IP PBX Micro VoIP 200 User Manual Version 1 7 Altesys SpA www altesys com ...

Page 2: ...o 4 1 2 Voice Mail Errore Il segnalibro non è definito 4 1 3 Call Forward Errore Il segnalibro non è definito 4 1 4 Call Park Errore Il segnalibro non è definito 4 2 PROXY SERVER 28 4 2 1 IP PBX behind NAT 29 4 2 2 Register Expire 29 4 2 3 Proxy Server 30 4 3 GATEWAY 31 4 4 CALL ROUTE 33 4 5 BLOCK LIST 35 4 6 CALL STATUS 36 4 7 HUNT GROUP 37 4 8 CALL PICKUP GROUP 37 4 9 CDR 39 4 10AUTO ATTENDANT 4...

Page 3: ...2 7 3 UPGRADE 63 APPENDIX I DHCP SERVER FUNCTION NOTICE 65 APPENDIX II USB DISK USAGE NOTICE 66 APPENDIX III HOW TO MAKE OFF NET CALLS PSTN CALLS 67 APPENDIX IV AUTO ATTENDANT ANNOUNCEMENT 70 APPENDIX V MAKE A CALL VIA HTTP CGI 71 APPENDIX VI CALL PARK PROCEDURES 72 APPENDIX VII UPLOAD VOICE FILE PROCEDURES 77 APPENDIX VIII HOW TO SETUPA FXO GATEWAY 83 ...

Page 4: ...th this single box to treat it as a Communication Center The Micro VoIP 200 provides not only basic call functions on traditional PBX system but also many advanced functions including voice mail to email web management roaming etc that s not possible on traditional PBX With Micro VoIP 200 company with branch offices in different countries can be easily combined together to work like a virtual sing...

Page 5: ...or Registered User HTTP Web Browser Management Remote HTTP Management Password Authentication using MD5 digest Software Upgrade via the Web Browser HTTP POST Configuration Backup Restore via Web Browser or USB Disk PBX Features Automated Attendant AA Interactive Voice Response IVR Record IVR via Phone Upload IVR via Web Browser Voicemail VM Embedded SMTP Server that Can Send VM notification or VM ...

Page 6: ...IP 200 Remote Office Support Interoperable with Other SIP Devices Call Features Call Forward Immediate Call Forward on Busy Call Forward on No Answer Do Not Disturb Forward to VM Direct Inward Dialing DID Call Pickup Call Park Call Retrieval Caller ID Roaming Extensions Music on Hold Music on Transfer Call Queuing Additional Features when used with Altesys IP Phones Call Transfer Attended and Blin...

Page 7: ...compliant with OHCI 1 1 Reset Button 1 reset button to restart the system LED Light 1 LED for power status 5 LEDs for the indication of LAN WAN link status 1 LED for USB Universal Switching Power Adaptor Input 100 240V AC Output 12V DC 1 A Dimension 15cm W x12cm D x3cm H Weight 500 g Operating Temperature 32 104 oF 0 40 oC Humidity 10 95 non condensing EMI Compliance CE FCC Table 1 Hardware Specif...

Page 8: ...ks otherwise you need to change the LAN IP of Micro VoIP 200 to a different sub network 2 Configure the WAN IP of Micro VoIP 200 depends on the internet connection of the office you can configure the WAN IP as PPPoE DHCP or static IP 3 Configure the users of the Micro VoIP 200 the user management page of the configuration will allow you to determine the number password and other things that you ne...

Page 9: ...each other the voice quality will be guaranteed Please notice that the Micro VoIP 200 not only has the IP PBX and SIP Proxy server functions it also has the NAT Router function inside You can let Micro VoIP 200 to work as a NAT Router for the computers on your office or you can just let Micro VoIP 200 work as a pure IP PBX and let other NAT Router device to do the NAT function for the computers on...

Page 10: ... se e the following web page 1 LAN You can change the LAN IPAddress and Subnet Mask of the Micro VoIP 200 here If there is already another DHCP server or another NAT Router device existed in the LAN network you must make sure that they are not using the same sub network 2 WAN You can configure the WAN IP as PPPoE DHCP or static IP depending on the internet connection method provided for the Micro ...

Page 11: ...Micro VoIP 200 User Manual v1 53 11 ...

Page 12: ...ll only provide IP address to IP Phones in this user management page the PC in the same network will not be able to get any IP address from Micro VoIP 200 In this way as depicted in Figure 1 the voice packets from IP Phones will go through Micro VoIP 200 and data packets from Notebook PC will go through other NAT Router The default value for this field is checked If you want to use the Micro VoIP ...

Page 13: ...password of the IP Phone account The allowed characters for the password are all digits Max allowed length is 64 This is also the password for accessing the voicemail records for this account 8 Call Group the call groups this IP Phone belongs to An IP Phone can belong to multiple call groups The purpose of assigning IP Phones to some call groups is for the pickup usage as explained in the next ite...

Page 14: ...m this office displayed local or from another office displayed remote 12 IP Port this field will show the IP address and port number of the registered IP Phone 13 APS the field when set to YES will enable the auto provisioning auto installation of this specific IP Phone the Micro VoIP 200 will give the user accounts to the specific IP Phone identified by the MAC address and thus the IP Phones coul...

Page 15: ...ou want all the IP Phones to have different password just check the Auto increase check box 3 The Call Group and Pickup Group check boxes could be multiply selected You can set the IP Phones to belong to some Call Groups and let the IP Phones to pick up the call of some Pickup Groups These two settings are independent Please refer to Figure3 for more detailed illustration 4 Do Not Disturb When the...

Page 16: ... DHCP header If the user is the remote user you have to enter the WAN IP address of Micro VoIP 200 to the IP phone web page manually 8 Fill in the e mail server of the office this is for voice mail to email service usage 9 Click Apply to generate all the user accounts of all the IP Phones back to the main menu 10 Make sure that DHCP Only for IP Phones is checked This will ensure the Micro VoIP 200...

Page 17: ...ually Suppose that your IP Phone is with number password as 101 101 and then just fill in this account into the IP Phone The default IP address of Micro VoIP 200 is 192 168 1 1 so just key in this IP address as the proxy server address field in the IP Phone The IP Phone network type is better set to be DHCP type Micro VoIP 200 settings On the Micro VoIP 200 you need to add this user account to all...

Page 18: ...tically or manually the registration status of all the IP Phones are displayed in the User Mgmt page as shown in the figure below If the IP Phone is registered to the Micro VoIP 200 successfully the Call Status field of that IP Phone will be green light Red light means unregistered and yellow light means registered on on call ...

Page 19: ...nd user The administrator can configure everything in the IP PBX while the user can only configure his setting or view his status For each legal user he can login the Micro VoIP 200 with the registered number and password The following page shows the menu structure when user 101 has login into the Micro VoIP 200 successfully ...

Page 20: ...ld possibly get the DNS server from ISP using PPPoE or DHCP if you want this DNS server information passed to DHCP client you can check on Provide Real DNS Server option Notice this DHCP server configuration will work for both Notebook PC and IP Phones if the DHCP only for IP Phones box in User Management is disabled If the DHCP only for IP Phones box in User Management is enabled this DHCP server...

Page 21: ...the following sections all the IP PBX related functions will be introduced 4 1 System The System settings are for the IP PBX related basic parameters including the following parts General Voice Mail Call Detailed Record Call Forward Call Park Distinctive Ring ...

Page 22: ...cted between registered devices ComCenter 200 cannot support Inband DTMF when the Remote PBX Codec is G 723 or G 729 Authentication This field can determine if the other SIP devices needed to be authenticated if they try to register to ComCenter 200 If this field is enabled only those devices with the correct accounts listed in the User Management page are allowed to register into ComCenter 200 Co...

Page 23: ... for System This will show how many seconds you can store VM in the system Local VM Access Number By dialing 9999 from your IP Phone you can access this IP Phone s voicemail records The IVR system will ask for a password just press the password of the SIP account to access your voicemail records This local access number could be changed Global VM Access Number By dialing 9998 from any other IP Pho...

Page 24: ... CDR after Send the E mail Select YES if you want to delete the records once you have send the E mail E mail Fill in the E mail address you want to receive the CDR records Send CDR immediately when the CDR Exceed the Maximum Value There are two cases that the system will send the CDR via E mail One is the configured period and the other is when the CDR records are full Once the CDR is full the sys...

Page 25: ...ne You can also disable this function through the menu configuration of the IP Phone device The default value for this function is 2 Call Forward on Busy Enable Enable the call forwarding on busy function of each IP Phone by pressing the specific digits on the IP Phone followed by the extension number to be forwarded and then press a digit This procedure must be done when the IP Phone is off hooke...

Page 26: ...when the IP Phone is off hooked and heard the dial tone You can also disable this function through the menu configuration of the IP Phone device The default value for this function is 6 Call Pickup Number This is the digits for any IP Phone to press after off hooked to pickup a call of the other ringing extension on the same pickup group Remember to press a digit after the specific digits The defa...

Page 27: ...ult value for this Call Park Number is 9 Call Retrieve Number This is the retrieve number range the user will heard from the phone when parking a call Parking Time This is the maximum allowed parking time for the parked call The default value for this function is 30 seconds 4 1 6 Distinctive Ring Extra Calling Ring Name If the call is the remote call ComCenter 200 will bring Alter Info ring name t...

Page 28: ...Yes and enable the SIP Keep Alive settings If you ITSP cannot support the private IP address registration you need to enable the Stun Server Settings You should turn on Stun Server or Outbound Proxy Settings according to the ITSP instructions The settings in IP PBX behind NAT and Register Expire are effective for all the items in the Proxy server settings If the WAN IP address of the Micro VoIP 20...

Page 29: ...le this option by clicking on the checkbox You will need to enable this only when the Micro VoIP 200 is put behind another NAT device SIP Keep Alive Period If you enable the keep alive you can fill in the period in this field The Micro VoIP 200 will periodically send out a small SIP message to keep the signal path between Micro VoIP 200 and the Proxy Server to prevent another NAT device from disco...

Page 30: ... the registered SIP proxy server Outbound Proxy if Micro VoIP is behind the NAT you should enable this option This will show the IP address and port of the registered SIP outbound proxy DID Direct Inward Dialing Any calls originating from the registered ITSP to Micro VoIP 200 will go into the auto attendant or direct to the selected user or hunting group Action You can modify the existing entry by...

Page 31: ...ow to add a FXO gateway entry By clicking Add button you ll see the Add Gateway page Fill in the Name Gateway IP Gateway Port Number of Analog Ports Physical FXO Ports and press Apply This Name will be used in the Call Route and it must be a unique for each Gateway If the Micro VoIP 200 is behind NAT we recommend you to connect the FXO gateway to the WAN side of the IP PBX If the Micro VoIP 200 ha...

Page 32: ...u can see the new entry and press Apply to save the settings to the flash If you delete the Gateway item the Call Route items associating with the Gateway will be deleted at the same time Micro VoIP 200 will prompt a message box to allow you to confirm the deleting ...

Page 33: ...to group together to become a much larger system and make Micro VoIP 200 to bundle to other SIP service system and to call to PSTN through the gateway devices The default route entry always exists in the Micro VoIP 200 and the user cannot delete it If the outgoing call cannot match any other call routes it will match the default route The fields of all items are explained below Name this is the na...

Page 34: ...utton to add the new Call Route entry By pressing Add you can see the following page The following steps will guide you how to setup a Call Route entry 1 Fill the 9 in the Pattern field any call begin with digit 9 will route to this entry 2 Then choose the existing Proxy Server Name from the dropdown combo box or select the existing FXO Gateway from the combo box 3 Fill in 1 in Drop Digits field 4...

Page 35: ...yping the new number and press Apply If you want to block some certain outgoing calls you can add the block number here For example if you want to block any number that starts with 0204 you can add the block pattern 0204 This setting will block the number 0204x 0204xx 0204xxx etc but it cannot block 0204 The Name must be unique for each Block List entry ...

Page 36: ...show all the users call status in this page When the operator wants to transfer the call he can know each user s call status in this page Red light means the user is unregistered Green light means the user has registered Yellow light means the user has registered and on the call ...

Page 37: ...1 All the users will be ringed in the same time in Parallel mode Micro VoIP 200 will ring the members randomly in Random mode By pressing Add button you can see the Add Hunt Group page 1 Fill the hunt group name in the Name field The name should be unique for each hunting group 2 Give a hunt group number that is not used by any other users and fill this number in Number field 3 Select the Hunt Mod...

Page 38: ...ing time to 30 seconds it will ring the hunting group 30 10 5 times 5 Select the group members from the left box to the right box 6 If no one will answer the call after the hunting time the system will go to one of the member s voicemail You need to choose one member from Goto VM after Hunting Time combo box 7 Press Apply to go back the main page ...

Page 39: ...Micro VoIP 200 User Manual v1 53 39 4 8 Call Pickup Group To view the members of the specified group you can select the group number and press Display button ...

Page 40: ...umber Callee this is the called party number Start Time the time when the caller starts the call Answer Time the time when the callee answered the call if the call is not answered this field will be empty End Time the time when any party hangs up the call Total Duration the total duration of the call from Start time to end time Bill the total duration of the call from Answer time to end time Call ...

Page 41: ...he extension number directly The digit 0 or 9 is called Service Digit the user can record the customized message that prompt the different digit ranging from 0 9 for different services This page is divided into three parts The first part provides two numbers for auto attendant and auto attendant recording The second part is the Auto Attendant Message List that allows the user to record 4 customize...

Page 42: ...ement This number 9997 could be changed Auto Attendant Recording Number By dialing 9990 from any extension IP Phone user can record the customized auto attendant announcement The IVR system will direct you to record every sentences needed for the auto attendant announcements that include welcome message off duty message in both English and native languages This number 9990 could be changed ...

Page 43: ...ice file size is 200 Kbytes The 200 Kbytes will allow you to upload 204 8 seconds G 729 voice file and 172 seconds GSM file For each message the system has reserved service digit 0 for the native language service and the user can add 5 digits for different services For Welcome message it always plays at the working hour The system has reserved digit 9 for operator service and the default operator ...

Page 44: ...six Service Time List entries By clicking Add button you can see the following page The following settings show the working hour is from 9 00 18 30 Monday to Friday Any call coming in this period will play the Welcome Message Press Apply to back to the previous screen and press Apply again ...

Page 45: ...d press Apply button you can see the following page Unfortunately you can never the Custome 1 message during Dec 25 Dec 31 The system will always match the first entry of the service time and play the Welcome Message since the first entry has the highest priority when matching the rule So you have to select the second entry and press Up button to move this entry to the first priority ...

Page 46: ...Micro VoIP 200 User Manual v1 53 46 Then you can see the following page Press Apply to save the settings to the flash ...

Page 47: ...e voice file size is 200 Kbytes The 200 Kbytes will allow you to upload 204 8 seconds G 729 voice file and 172 seconds GSM file If the Micro VoIP Remote PBX Codec is G 711ulaw or G 711alaw you have to upload the gsm file to the system If the codec is G 729 you have to upload the file with g729 format We ll show the details in Appendix VII Please note that files extension is case sensitive you must...

Page 48: ...1 are all related to NAT advanced functions of Micro VoIP 200 these functions will work when Micro VoIP 200 is not only working as an IP PBX but also working as a NAT Router for the office But we recommend just use Micro VoIP 200 as a pure IP PBX to guarantee the voice quality So if you just use Micro VoIP 200 as a pure IP PBX then don t need to do any configurations for section 5 1 to 5 11 Notice...

Page 49: ...cessing certain internet service There are 8 different access control lists for user s configuration If you want to generate the ACL log you have to check the Generate ACL Log box on The following setting gives the example of blocking a certain Notebook PC with IP address 192 168 1 250 from doing the FTP access port 21 to the internet ...

Page 50: ...d to 192 168 1 2 You may use this function to establish a Web server or FTP server service through Micro VoIP 200 Be sure that you enter a valid IP Address You may need to establish a static IP address with your ISP in order to properly run an Internet server The packets will simply be forwarded through the Micro VoIP 200 Enter the range of port numbers and the protocol type UPD or TCP that will b...

Page 51: ... some Notebook PC from accessing to some websites by listing them in this URL Filter list For example if you want to deny all the Notebook PC with IP addresses from 192 168 1 2 to 192 168 1 254 to access the www playboy com website you can do the following settings ...

Page 52: ...lled on your network The Static Route function let the Micro VoIP 200 be able to direct some packets to go to correct interface LAN or WAN when the packets were with destination IP address listed in the Static Route list For example if you have the following network hierarchy you can configure the following settings in the routing table ...

Page 53: ... allow them to pass inside Micro VoIP 200 to a specific Notebook PC by setting this Special Application list For a certain special application to pass through Micro VoIP 200 first a trigger packet that has a destination port falling in the range between Trigger Start Port and Trigger End Port must be sent from a Notebook PC in the LAN side out to the WAN side Second the packets of the special appl...

Page 54: ... Host setting can allow one local user to be exposed to the Internet with no firewall protection When a local user wishes to use some special purpose service such as an Internet game or Video conferencing set the dedicated DMZ Port and click the Apply button ...

Page 55: ...Micro VoIP 200 User Manual v1 53 55 5 7 DoS DoS Denial of Service Protection When you enable this function it will block most of the Internet attacks This option is enabled as default value ...

Page 56: ... 56 5 8 Dynamic DNS Micro VoIP 200 support dynamic DNS service If the WAN IP address of Micro VoIP 200 is dynamic and public PPPoE you can use this service to let other Internet host to access Micro VoIP 200 by its dynamic domain name ...

Page 57: ...s you can let some specific types of packets to pass through Micro VoIP 200 without any modification of the packets The types of packets that could be enabled to pass through are PPPoE IPv6 IPX NETBIOS and IP multicast You can choose to enable some of these types to pass through by checking the Pass through page ...

Page 58: ...me devices installed inside the LAN network of Micro VoIP 200 The specific devices must have some UPnP application running to let this function work Window XP can support UPnP function MSN version above 6 0 can use UPnP to learn the NAT router s WAN IP and thus traverse the NAT seamlessly To enable the UPnP function just check on the box and press Apply to take effect ...

Page 59: ...w Micro VoIP 200 to ping another device in the LAN network or in the Internet to check if the network link between Micro VoIP 200 and the specific device are connected The results of the pinging will be displayed in this page The following web page shows the example of pinging www google com ...

Page 60: ... There are five kinds of events that could be logged they are system ACL section 5 1 URL filter section 5 3 New NAPT newly opened port mapping and PBX logs For example if you want to log the system events you need to check on this System Log check box and pressing Apply button Latter on you could then press the View System Log to see the logged events ...

Page 61: ...difying this field The default port number is 8080 If you want to disable remote management through web you need to enter 0 in this field Ping from WAN Side This feature is designed to prevent attacks through the Internet When it is disabled the Micro VoIP 200 will drop ICMP packets from the WAN side The hacker cannot find the Micro VoIP 200 by pinging the WAN IP address The default value of this ...

Page 62: ... 2 Password This setting allows you to change the web login password of the administrator account If you want to change the password just click on Password page and type the new password Press the Apply button when you have done the input ...

Page 63: ...iguration By pressing Backup button you can save Micro VoIP 200 s current configuration settings into a file in your PC The saved filename is config dat Restore Configuration The configuration of Micro VoIP 200 could be restored from the backup configuration file you stored previously with the file name of config dat You can press the Browse button to select the backup configuration file name Then...

Page 64: ...Micro VoIP 200 User Manual v1 53 64 ...

Page 65: ...ble to get any IP address from Micro VoIP 200 In this way as depicted in Figure 1 the voice packets from IP Phones will go through Micro VoIP 200 and data packets from Notebook PC will go through NAT Router This is the default setting Under this situation if the APS selection is checked the IP Phone will also get the auto configuration information file name from DHCP packets and the IP Phone could...

Page 66: ...memory after boot up If there is no valid configuration in the USB Disk or the USB Disk is not plugged into the system the system will load the configurations from the system flash memory instead Configuration Synchronization During the web page configuration when the Apply button in each page is pressed the new settings will be saved into the system flash memory and USB Disk simultaneously Factor...

Page 67: ...rver psip1 mclink it and this service is named MC Since a Micro VoIP 200 could register to up to sixteen different proxy servers so there must be a way to direct a call to go to the correct proxy server you desired to use This is done through the Call Route settings see section 4 3 For example as depicted in the following web page of a call route setting if you want to make the off net call via MC...

Page 68: ... In the reverse direction if any user of the public proxy server dials into Micro VoIP 200 by calling the Micro VoIP 200 s registered number this call will enter into the Auto Attendant announcement of Micro VoIP 200 or the selected user ...

Page 69: ...ed to Micro VoIP 200 with the registered number as 0 then any extension IP Phone can dial 0 to first connect to the gateway and then dial the desired PSTN number This is a two stage dialing b If you want to configure a one stage dialing a call route with destination IP address pointed to the FXO gateway must be added in the Call Route list The following figure shows the sample configuration In thi...

Page 70: ...lare con un operatore o digitare l interno desiderato Press 0 for English language 2 Native Invalid message spiacente non si tratta di un interno corretto provare di nuovo 3 Native Off duty message Siamo spiacenti ma gli uffici sono momentaneamente chiusi 4 English Welcome message Please dial the extension number or press 9 for operator 5 English invalid message I m sorry that s not a valid extens...

Page 71: ...up asp from exten For example you want to make a call from extension 102 to 5781019 You can type the following cgi string The system will ring the 102 firstly After the extension 102 has pickup the call the system will ring 5781019 If the callee has not pickup the call in 30 seconds the system will terminate the call http 192 168 1 1 goform call asp from 102 to 5781019 timeout 30 To hang up the ca...

Page 72: ...llowing steps we assume that you have installed the SJ phone and registered to the Micro VoIP 200 successfully SJ Phone only supports G 711 codec so you have to set the Micro VoIP 200 Remote PBX Codec to G 711 uLaw or G 711 aLaw For this demonstration we ll set the SJ Phone and Micro VoIP 200 codec to G 711 uLaw Suppose we have the following architecture as Figure 4 The user 101 call 103 103 park ...

Page 73: ...VoIP 200 User Manual v1 53 73 Step1 103 have received the incoming call from user 101 Press Accept button to accept the call Step2 After you have accepted the incoming call you will see the following display ...

Page 74: ...Micro VoIP 200 User Manual v1 53 74 Step3 Press Hold button to hold the call Step4 Type 9 and press the Dial button to park the call ...

Page 75: ... 75 Step5 Now you can see 2 phone calls shown on the screen and heard a number between 9900 9910 to retrieve the call In this case the retrieve number is 9900 Step6 Now you have two calls move the mouse to select the On Hold 101 call ...

Page 76: ...P 200 User Manual v1 53 76 Step7 Press the Transfer button and click the 9 Now the call has been parked successfully Step8 You can now walk to IP Phone 102 pick up the handset and dial 9900 to retrieve the call ...

Page 77: ...oad g729 file The upload files will be placed at the USB disk and the file size cannot exceed 200 Kbytes Many shareware or software can record the voice in gsm format We ll use WavePad to demonstrate the recording procedures You can find the information of WavePad in http www nch com au wavepad masters html The following steps demonstrate how to record a file using the WavePad and how to use the A...

Page 78: ...Micro VoIP 200 User Manual v1 53 78 Step2 Press OK button Step3 Start to record the IVR till you press button to stop recording ...

Page 79: ...Micro VoIP 200 User Manual v1 53 79 Step4 Move the mouse to the upper right corner of the window and click the the close the recording window Step5 Click on to play the voice ...

Page 80: ...cro VoIP 200 User Manual v1 53 80 Step6 Move the mouse to File and select Save File As menu to save the voice Step7 Type in the filename select the extension to GSM and press Save button to save the file ...

Page 81: ... 81 Step8 Type in the filename select the extension to Wave and press Save button to save the file Step9 Choose the 8 kHz 16 bits Mono 15 kb second PCM and press OK button to save the file This will be the uncompress wave file format ...

Page 82: ...Micro VoIP 200 User Manual v1 53 82 Step10 Then you can use G 729 encoder to convert the uncompress wave file to g729 file ...

Page 83: ...e all the gateways to work with Micro VoIP 200 We just use Altesys Gateway as an example to show the configurations If you have problem in configuring your FXO gateway please ask the customer service of your Gateway vendors The FXO physical ports don t need to register to Micro VoIP 200 as the users You just need to follow the following three steps 1 Micro VoIP 200 Add the one FXO gateway entry in...

Page 84: ...4 3 FXO Visit SIP Config Page Set Proxy mode fill in the LAN IP of Micro VoIP 200 to Primary Proxy IP Address and fill in the server port of Micro VoIP 200 to Primary Proxy port 4 Commit Data and Reboot System to make changes effective ...

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