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User Manual MX Series Voice Gateway

108 New Rock Technologies, Inc.

packets. In this mode, the physical network port of the device has no separate address and shares the IP

address of the VLAN interface.

3.1.1

LLDP

With Link Layer Discovery Protocol (LLDP) enabled, during startup the device automatically obtains

VLAN configuration information via an LLDAP message, adds VLAN tag in packets it sends, and obtains

network information such as IP address using the DHCP mode by default.

Configuration

After login, click

Basic

VLAN

. Set

LLDP

, set

LLDP packet interval

, and then click

Save

Summary of Contents for HX4E Series

Page 1: ...Voice Gateway User Manual New Rock Technologies Inc MX Series Voice Gateway User Manual HX4E HX4G MX8A MX8G MX60 MX60E MX120G Website http www newrocktech com Email gs newrocktech com Document Versio...

Page 2: ...4 P2 Document Rev 02 March 2017 Added MX60E and removed MX120 This manual is applicable to New Rock s MX series Voice Gateway V351 Document Rev 01 June 2016 This manual is applicable to New Rock s MX...

Page 3: ...A MX8G 17 1 3 3 MX60 20 1 3 4 MX60E 22 1 3 5 MX120G 25 1 4 Web Management Page 28 1 4 1 Layout 28 1 4 2 Buttons Used on Gateway Management Interface 28 2 Parameters Setting 29 2 1 Login 29 2 1 1 Obtai...

Page 4: ...le on the HX4E HX4G 57 2 4 4 Trunk Characteristics 58 2 5 Routing 60 2 5 1 Digit Map 60 2 5 2 Routing Table 62 2 5 3 Examples of Routing Rules 66 2 6 Advanced Configuration 67 2 6 1 System 67 2 6 2 Au...

Page 5: ...Message Count 97 2 9 Logs 98 2 9 1 System Status 98 2 9 2 Call Message 99 2 9 3 System Startup 100 2 9 4 Manage Log 100 2 10 Tools 102 2 10 1 Configuration Management 102 2 10 2 Upgrade 102 2 10 3 Re...

Page 6: ...ice Gateway 4 Making an OpenVPN Client Certification HX4E MX8A HX4G MX8G 120 5 Appendix High Availability Configuration 123 6 Appendix Auto Provisioning Configuration 124 7 Appendix RJ45 and RJ11 Corr...

Page 7: ...2 3 Network Configuration Interface HX4E HX4G MX8A MX8G 32 Figure 2 4 Network Configuration Interface MX60 MX60E MX120G 33 Figure 2 5 VLAN Configuration Interface 35 Figure 2 6 System Configuration I...

Page 8: ...Call Progress Tone Configuration Interface 79 Figure 2 36 Feature Codes Configuration Interface 81 Figure 2 37 Clock Service Interface 83 Figure 2 38 Access Configuration Interface 85 Figure 2 39 Acc...

Page 9: ...N ID 110 Procedure of Handling the LLDP Message with no VLAN ID 110 Figure 3 2 LLDP Message 111 Figure 3 3 Adding a VLAN ID to the Message to Be Sent 111 Figure 3 4 Configuring the Single VLAN 114 Fig...

Page 10: ...Meanings of MX60 Indicators 22 Table 1 15 Configuration Combination of MX60E 22 Table 1 16 Description of MX60E Front Panel 23 Table 1 17 Description of MX60E Back Panel 24 Table 1 18 Meanings of MX60...

Page 11: ...e 2 25 SNMP Configuration Parameters 70 Table 2 26 TR069 Configuration Parameters 71 Table 2 27 Media Stream Configuration Parameter 73 Table 2 28 SIP Related Configuration Parameter 75 Table 2 29 RAD...

Page 12: ...User Manual MX Series Voice Gateway Table 7 45 Pin Specifications for RJ45 Socket Port 125...

Page 13: ...ns for institutions enterprises and schools To be used as remote access equipment for IP PBXs in call center deployment The MX family has four sub series HX4E MX8A HX4G MX8G MX60 MX60E and MX120G whic...

Page 14: ...s support local and remote management operations through Web GUI or SSH SNMPv2 based and TR069 TR104 TR106 based centralized management schemes and auto provisioning Maintenance tasks such as modifyin...

Page 15: ...security settings such as accessing whitelists Message waiting indications MWI with high voltage FSK or reversed polarity Support accessing the Web GUI by using HTTPS Support Ping blocking Support opt...

Page 16: ...G Back Panel Item Description PWR Power interface 12 VDC input PC and WAN The PC port is used to connect a computer The WAN port is used to connect the uplink network Both are 10 100 Mbps Ethernet por...

Page 17: ...ot started WAN green Steady green A WAN connection is established without any service flow Blinking green A WAN connection is established with service flow Off WAN interface is disconnected PC green S...

Page 18: ...Types Number of FXS Ports Number of FXO Ports 401A 4FXS 4 0 401A 4FXO 0 4 401A 2FXS 2FXO 2 2 Figure 1 3 MX8A MX8G Front Panel Table 1 8 Description of MX8A MX8G Front Panel Item Description PWR Power...

Page 19: ...ch by default is obtained through DHCP If no IP address is obtained 192 168 2 218 is used by default and you can change it on Basic Network page FXO FXS FXS port or FXO port Figure 1 5 RJ45 to RS232 S...

Page 20: ...log trunk Steady green Off hook or call established Blinking green Ringing on incoming call Off The port is in idle status Note The device starts up for approximate 30s to indicate line type then indi...

Page 21: ...nd RJ11 see 7 Appendix RJ45 and RJ11 Corresponding Relations Note Numbers of interface slots vary from different configuration Numbering definition of interface slots on the left side of chassis is 1...

Page 22: ...Alarm Indication Off No alarms Blinking red New alarms occurred but not confirmed Steady Red System in the process of powered up and not in the normal operation mode Red Alarms existed and all alarm i...

Page 23: ...responding relations of RJ45 and RJ11 see 7 Appendix RJ45 and RJ11 Corresponding Relations Note Numbers of interface slots vary from different configuration Numbering definition of interface slots on...

Page 24: ...Table 1 18 Meanings of MX60E Indicators Mark Function Status Description PWR Power Indication Green Power on Off Power off STU Status Indication Off System locked and inactive Blinking green Normal o...

Page 25: ...FXS 8 16 8 12FXS 12 12 12 Table 1 21 Configuration Combination of MX120G Models Number of FXS Ports Number of FXO Ports Concurrent calls Description MX120G NA X Depend on the models and number of the...

Page 26: ...3 slot marked with No 49 to 72 and on the up right side of chassis is 4 slot marked with No 73 to 96 Note The interface card is hot swappable but you should reboot the device after the replacement of...

Page 27: ...erated Steady red The alarms indicated by the blinking alphabetic messages D on LED dot matrix are generated ETH1 ETH2 green Steady green right side The transmission rate is 1000 Mbps Off right side T...

Page 28: ...structure When the cursor is moved to an upper level menu the lower level menu is displayed for your selection After you click a tab the tab page is displayed in the configuration area 4 Configuratio...

Page 29: ...d 192 168 2 240 255 255 0 0 MX120G Disabled 192 168 2 240 255 255 0 0 You can dial to obtain the current gateway IP address version information of firmware and port used to access the Web GUI using th...

Page 30: ...users are classified into administrator and operator The default password is shown in Table 2 2 The password is shown in a cipher for safety Table 2 2 Default Passwords for logging to Web GUI Type Def...

Page 31: ...please choose Tools Change password and change the password when you log in for the first time For details see 2 7 1 Access Security 2 1 4 Accessing Through SSH For safety users are not allowed to dir...

Page 32: ...ss list page For details see 2 7 1 Access Security 2 2 Basic Configuration 2 2 1 Status After login open the Basic tab page to view device information If the SIP port of the device is 5060 you are adv...

Page 33: ...ere If the gateways obtain an IP address through DHCP the system will display the current IP address automatically obtained from DHCP Subnet mask The subnet mask is used with an IP address When the ga...

Page 34: ...TUN server It is 3478 by default Session interval The interval at which the device sends a STUN request ranges from 30 to 3600 seconds It is 60 second by default Operations Trunk re registration A re...

Page 35: ...ter the LLDP is enabled The value range is 5 to 3600 seconds The default value is 30 seconds DHCP Enable the device to obtain the VLAN tag and QoS by using DHCP option 132 and option 133 Note This fun...

Page 36: ...P address to a static IP address DHCP automatically obtain an IP address by using the DHCP protocol IP address IP address of the VLAN interface Netmask Subnet mask of the VLAN interface Gateway IP add...

Page 37: ...e next number within a set time by this parameter e g 2 seconds the gateways will consider that the subscriber has ended dial up and call out the dialed number 021 Codec Configures the voice codec in...

Page 38: ...sent from port The default value is 100 ms The duration time range is 50 150 ms Min DTMF detection duration Minimum duration time of effective DTMF signal Its effective range is 32 to 96 ms The defaul...

Page 39: ...ult value The register server address can be an IP address or a domain name e g 168 33 134 51 5000 or www sipproxy com 5000 When a domain name is used you must activate DNS service and configure DNS s...

Page 40: ...ication by platform It has no default value It can be formed with either numbers or characters and is case sensitive Note If Per gateway or Per Line GW Auth is selected for Registrar mode the password...

Page 41: ...request is not sent to the current SIP server Active SIP server This parameter displays the current SIP server address Switchover If you click Switchover the gateway performs switchover to the next a...

Page 42: ...back to RTP for incoming calls only SRTP negotiation is used for outgoing calls but RTP negotiation is also supported for incoming calls Both RTP SRTP RTP preferred for incoming calls both RTP and SRT...

Page 43: ...must be set since there is no default value The factory setting is L HD L HU L HD Offhook L HU Onhook FXO event package Handset Package or Line Package Wildcard Select whether a wildcard with prefix...

Page 44: ...server Default not selected Selected the gateways will use NTFY messages to replace 401 and 402 messages No name in default package Select if a package name is included when the gateways reply to the...

Page 45: ...en fax messages are received or sent through an IP trunk a T 38 or a G 711 transparent transmission mode needs to be selected according to an actual requirement and the mode supported by the IP phone...

Page 46: ...rement and decrement of the T 38 fax transmission gain The value ranges from 6 to 6 dB The default value is 0 dB 6 dB indicates an attenuation of 6 dB and 6 dB indicates an amplification of 6 dB Packe...

Page 47: ...view details of the security events and acknowledge the alarms Figure 2 13 Alarm Icon Figure 2 14 Alarms Interface You may do the following operations History Click to download the security event log...

Page 48: ...No This number is used for the batch setup of subscriber line Click Batch after filling in initial number the number of Line 1 adopts initial number that of Line 2 increases 1 progressively based on t...

Page 49: ...is parameter is displayed only when Multi port is selected in page Advanced SIP Set the port used for receiving and sending SIP messages associated with the line If this parameter is not specified the...

Page 50: ...ified in this parameter when the extension is busy Call Forking Select to activate call forking Forking allows the device to simultaneously dial the extension along with another telephone terminal spe...

Page 51: ...t selected Outgoing call barring Select if outgoing calls are barred on this line By default this is not selected Three way calling Select if 3 way service is activated and by default this is not sele...

Page 52: ...Rock Technologies Inc Figure 2 17 Feature Batch Configuration Interface 2 3 4 Subscriber Line Characteristics The content below is only applicable to gateways with FXS ports After login click Line fe...

Page 53: ...lification of 3 decibels Gain to terminal Adjust the voice volume to the analog extension The default is 3 Taking decibel as the unit setting range is 6 3 decibels 3 means declining of 3 decibels 3 de...

Page 54: ...elay set here Setting of 0 means no extension number relay The default is 0 milliseconds Loop open interval This parameter is used with the loop open disconnection request The range is from 100 ms to...

Page 55: ...terns for ring cadence 3 Alert Info 4 Match with ring cadence 4 Configure ring patterns for ring cadence 4 Configure ring patterns for ring cadence 4 It is used with Alert Info 4 2 4 Trunk 2 4 1 Phone...

Page 56: ...associated with the trunk set in Trunk Phone number Display as Fill in the display name associated with this port Local SIP port Set the port used for receiving and sending SIP messages on the line I...

Page 57: ...enabled the default registration server and proxy server are used SRTP Enable SRTP Registration subscription Periodically send subscription messages to the SIP server The period of sending the subscr...

Page 58: ...ay 58 New Rock Technologies Inc Figure 2 21 Trunk Batch Configuration Interface 2 4 4 Trunk Characteristics Only a gateway with FXO ports can display this interface After login click Trunk Advanced to...

Page 59: ...he voice volume sent from the device to the PSTN Increase the value when the volume received by external party is low Range 6 0 3 0 dB Impedance Set the parameter of FXO impedance with the default of...

Page 60: ...e duration of the off hook is 500 5000 milliseconds with a default of 600 milliseconds On hook protection time Protection period following hang up of FXO port During this period the gateway ignores an...

Page 61: ...igit between 0 9 After is detected the gateway terminates the process of receiving digits also functions as a special dial string for users to receive gateway IP address and version number of firmware...

Page 62: ...ving 12 digits starting with 013 13xxxxxxxxx The gateway terminates receiving digits after receiving 11 digits starting with 13 11x The gateway terminates receiving digits after receiving three digits...

Page 63: ...to the SIP proxy server when there is no matched rule for the call The format of number transformation is Source Number Transformation Method Take FXS 021 REMOVE 3 as an example It indicates that for...

Page 64: ...s Processing Mode Description and Example KEEP Keep number A positive digit following KEEP indicates the number of digits at the beginning of the sequence that is kept a negative digit indicates numbe...

Page 65: ...1 CPNX ROUTE FXS 2 For calls from IP address 222 34 55 1 calling party number is replaced by 2680000 and then the call is routed to FXS port 2 with the new calling party number CODEC Designate the use...

Page 66: ...ow routing table can be used to implement features 1 Assigning One Phone with Dual Numbers 2 Hunt Group 3 Outbound Call Barring 4 Trunk Group for Outbound Calling Assigning One Phone with Dual Numbers...

Page 67: ...number starts with 2 at an FXS port is not allowed to make calls Trunk Group for Outbound Calls An outbound trunk group consists of a set of trunks which are used for outbound calling following certa...

Page 68: ...ote The recording function needs to be enabled for the subscriber line NAT NAT traversal Gateways support several mechanisms for NAT traversal Usually static NAT is used when a fixed public IP address...

Page 69: ...uto Provisioning Configuration Table 2 24 Auto Provisioning Configuration Parameters Name Description Obtain ACS address via DHCP option 66 FTP TFTP HTTP HTTPS ACS Auto Provisioning Server address is...

Page 70: ...ower on Periodical is set this parameter specifies the interval for periodic automatic upgrades The default range is 3600 seconds The value range is 5 to 84600 second 2 6 3 Management System Type Afte...

Page 71: ...tion to the ACS It can be numbers or English letters Model name A brief description of the interface type or name in the form of characters Periodic inform enable A switch used to specify whether to p...

Page 72: ...client vpn based on the information provided by the server For details see 4 Making an OpenVPN Client Certification Step 2 Click Upload Step 3 Select and upload the file client ovpn Step 4 Reboot the...

Page 73: ...300 bit s or 6 300 bit s It is 6 300 bit s by default SIP_TOS For SIP signaling set the service quality for different priorities The default value is 0x00 RTP_TOS For RTP voice streams set the servic...

Page 74: ...by a client to the server for the purpose of activating the given operation including INVITE ACK BYE CANCEL OPTION and UPDATE etc Message of response the SIP message sent by a server to the client as...

Page 75: ...n refresh RFC 4028 By default session timer is not activated By default this is not selected Session interval Set the session refresh interval that will be included in the Session Expires field of INV...

Page 76: ...inating number is chosen the number 13055553333 will be sent to 3224422 as calling party number If Forwarding number is chosen the number 2551111 will be sent to 3224422 as calling party number Do not...

Page 77: ...me for calling party SIP SIP URI is used for example From sip 212 172 16 10 126 tag 143349062153 1 TEL tel URL is used such as From tel 212 tag 143349065857 1 Called party number Select the address sc...

Page 78: ...y will automatically activate standby Radius server Note In case of no configuration of port number use default port number of 1813 Key The share key for communications between Radius client and stand...

Page 79: ...6 9 Call Progress Tone Plan After login click Advanced Tones to open this interface Figure 2 35 Call Progress Tone Configuration Interface Table 2 31 Call Progress Tone Configuration Parameters Name...

Page 80: ...40 300 0 10000 Indicate a 440 Hz single frequency tone repeated twice in the cadence of 300 milliseconds on and 10 seconds off 950 333 1400 333 1800 333 0 1000 Indicate the repeated playing of 333 mil...

Page 81: ...lect the checkbox to not allow the change of the service feature code By default service feature codes are not allowed to change Activate CFU The feature code for activating unconditional call forward...

Page 82: ...3 2 Subscriber Line Features Deactivate DND The feature code to cancel DND with default of 72 Dialing the feature code may recover normal ringing upon the arrival of incoming calls Speed dial Define...

Page 83: ...MX Series Voice Gateway User Manual New Rock Technologies Inc 83 Figure 2 37 Clock Service Interface...

Page 84: ...Cairo GMT 02 00 Israel GMT 02 00 Zimbabwe GMT 03 00 Moscow GMT 03 30 Teheran GMT 04 00 Muscat GMT 04 00 United Arab Emirates GMT 04 30 Kabul GMT 05 30 Calcutta GMT 05 00 Karachi GMT 06 00 Almaty GMT 0...

Page 85: ...he following operations to prevent mostly illegal accessing to the device Regularly change the admin operator password for accessing Web GUI Regularly change the root operator password for accessing t...

Page 86: ...f this parameter is selected terminals are allowed to access the device through SSH It is not selected by default When accessing the device through SSH you should login with user operator and use su r...

Page 87: ...9 Access list configuration Interface Step 1 Click Add Step 2 In the input box enter IP addresses and select types of service Step 3 Select Enable and click Save If SSH is selected please enable SSH o...

Page 88: ...sor will be blocked After login choose Security Brute force login prevention to go to the configuration interface Figure 2 40 Brute Force Login Prevention Login Retry Lockout Configuration Interface T...

Page 89: ...rules to allow or deny receiving packets from specified IP addresses to certain ports on the device For example if a remote host with the IP address x x x x allowed to connect to a certain service usi...

Page 90: ...packets from the source IP address 192 168 120 54 Rule 3 Ports 5060 and 5061 of the device are prohibited from receiving data packets of any protocol type from the source IP address 192 168 120 54 2...

Page 91: ...ocol type The value can be set TCP UDP or any Packets per second Specifies the maximum data packet rate allowed for a local port If the data packet receiving rate exceeds this value the IP address of...

Page 92: ...the static defense list and block the matched packets Accept Add the entry to the static defense list and accept the matched packets Cancel Cancel to add the entry to the static defense list Table 2 4...

Page 93: ...gnaling from authorized IP addresses If the IP table is empty the gateways will not perform IP address based message filtering If the gateway is deployed in a public network you are advised to set IP...

Page 94: ...figuration Interface 2 7 8 Encryption After login click Security Encryption to open this interface Figure 2 47 Encryption Configuration Interface Table 2 41 Encryption Configuration Parameters Name De...

Page 95: ...in name When a domain name is used it is required to configure DNS server on the Basic Network page Example 201 30 170 38 1020 or sbc com 1020 Local port Signaling port assignment of the gateway the d...

Page 96: ...Enter the password provided by the L2TP VPN server OpenVPN client certificate Note Accurate device time is necessary for OpenVPN please verify the device time on Advanced System time page To configure...

Page 97: ...click Call Status Call history on FXS to open this interface Figure 2 50 Interface of Call History on FXS 2 8 4 Call History on FXO After login click Call Status Call history on FXO to open this inter...

Page 98: ...System Status Critical runtime information of gateways can be obtained in this interface including Information regarding login interface including IP address and permissions of the user SIP registrat...

Page 99: ...one operator log in at the same time the first user s permission level is 2 the others are 3 SIP Registration Info Show registration status Not enabled the registration server s address has not been...

Page 100: ...e 2 9 3 System Startup After login click Logs System Startup to open this interface Log files can be downloaded through this interface Figure 2 55 Interface of System Startup 2 9 4 Manage Log After lo...

Page 101: ...level should be set to 4 or lower when gateway is used in normal operation Syslog System log server The syslog server receives the logs that are otherwise recorded in debug log message log and boot l...

Page 102: ...load procedure of log files The steps for importing configuration files are the same as the Upgrade The steps for exporting configuration files are the same as the steps for Log Download Figure 2 59 C...

Page 103: ...The upgrading by tar gz file will not change the current configurations But you are advised to backup the configurations by clicking Export on Tools Configuration maintenance page before upgrading Th...

Page 104: ...you can choose to restore network or telephony related factory settings or both For MX60 MX60E MX120G only restoring both is available Restoration takes effect after the system is restarted Figure 2...

Page 105: ...es each with up to 2M bytes The capture is stored in the downloaded file under log dump cap in libpcap format Figure 2 66 Ethereal Capture Interface 2 10 6 Network Diagnosis HX4E MX8A HX4G MX8G After...

Page 106: ...roduct Information After login click Version info to view the gateway hardware and software version information 2 12 Reboot To restart the gateway click Reboot in the top right corner 2 13 Logout Afte...

Page 107: ...ing startup the device automatically obtains VLAN configuration information via an LLDAP message adds VLAN tag in packets it sends and obtains network information such as IP address using the DHCP mod...

Page 108: ...interface 3 1 1 LLDP With Link Layer Discovery Protocol LLDP enabled during startup the device automatically obtains VLAN configuration information via an LLDAP message adds VLAN tag in packets it se...

Page 109: ...VLAN is also manually enabled on the GUI interface its VLAN information will be replaced by the information that the device has obtained from the LLDP message If the message does not carry a VLAN ID t...

Page 110: ...During startup period if the device receives LLDP messages with no VLAN ID it uses the VLAN information configured manually 0 shows the handling procedure Procedure of Handling the LLDP Message with...

Page 111: ...thernet frame headers of all messages to be sent In addition the device adds a DSCP value to the RTP message Figure 3 3 shows the sent message with a VLAN ID Figure 3 3 Adding a VLAN ID to the Message...

Page 112: ...and option 133 to the DHCP server 1 The DHCP server returns DHCPOFFER message in response 2 The device sets the global VLAN by using the values in option 132 and option 133 carried in DHCPOFFER messag...

Page 113: ...the single VLAN mode all device services belong to the same VLAN The device receives only data packets that carry the VLAN tag and includes the VLAN tag in all sent data packets In this mode the phys...

Page 114: ...n in Figure 3 5 Figure 3 5 A Data Packet Carrying a Corresponding VLAN Tag in the Single VLAN Mode 3 2 2 Multi Service VLAN In the multi service VLAN mode the device can configure a VLAN tag a priorit...

Page 115: ...SIP and media stream RTP T 38 are on the same VLAN In this mode the voice VLAN can be configured with a separate IP address On the web interface click Network and ensure that the VLAN function is set...

Page 116: ...Multi service VLAN Select Mode 2 for Voice VLAN and specify VLAN tags for SIP and RTP T 38 Figure 3 7 Configuring Voice VLAN to Work in Mode 2 Configuring Management VLAN The device adds VLAN tag con...

Page 117: ...d VLAN 300 The port for connecting the switch and SIP server is added to VLAN 300 The ports for connecting the switch to the PC used for managing HX4 are added to VLAN 200 Figure 3 9 Network Environme...

Page 118: ...e the PC belonging to VLAN 200 to log in to the web page On the Basic Status page the IP address of each interface of the device can be viewed as shown in Figure 3 11 From top to bottom IP address of...

Page 119: ...the SIP packet and RTP packet Figure 3 12 SIP Data Packet Carrying VLAN Tag of the Voice VLAN in the Multi Service VLAN Mode Figure 3 13 RTP Data Packet Carrying VLAN Tag of the Voice VLAN in the Mul...

Page 120: ...aim it is a OpenVPN client client Could be tap or tun as required by the VPN server dev tap persist tun persist key Encryption type as required by the VPN server cipher AES 128 CBC tls client tls auth...

Page 121: ...SA PRIVATE KEY key tls auth Copy the content beginning with BEGIN and ending with END from ta key to replace the following content BEGIN OpenVPN Static key V1 END OpenVPN Static key V1 tls auth Step 3...

Page 122: ...User Manual MX Series Voice Gateway 122 New Rock Technologies Inc...

Page 123: ...x High Availability Configuration For configuration details High Availability Configuration Guide Note If the link is unavailable go to New Rock s official website http newrocktech com to obtain the f...

Page 124: ...g functions Configuring all gateways or upgrading the firmware of all gateways or selectively upgrading certain gateways Automatically updating all gateway parameters Supporting TFTP FTP HTTP or HTTPS...

Page 125: ...the interface card and distribution panel in equipment installation Standard RJ11 telephone lines can be used to plug in a RJ45 socket The telephone trunk lines are connected to the 3rd pair of pins...

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