Manuale d’uso / di manutenzione del prodotto Gateway Series del fabbricante NetComm
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Reference Guide SmartV oice Gateway Series 4-port and 8-port Gateways.
2 SmartVoice Gateway(s) User Guide YML832 Rev2 Contents 1. Introduction ........................................................................................................................................... 4 Product Overview ....................
SmartVoice Gateway(s) User Guide 3 YML832 Rev2 NTP (Network Time Protocol) .................................................................................................................70 System Operations (Save Settings) ..........................
4 SmartVoice Gateway(s) User Guide YML832 Rev2 1. Introduction Product Overview The NetComm SmartVoice series of stand-alone VoIP Gateways carry both voice and facsimile over an IP network.
SmartVoice Gateway(s) User Guide 5 YML832 Rev2 Items that you will need and things you will need to know T o correctly install and set up your VoIP Gateway you will need to ensure that the required broadband hardware and services are setup and configured in the appropriate wa y to integrate this equipment.
6 SmartVoice Gateway(s) User Guide YML832 Rev2 NetComm SmartVoice Gateway Features WAN • One 10/100Mbps auto-negotiation, auto-crossover RJ-45 Ethernet port • Support static IP , PPPoE, Bigpond Ca.
SmartVoice Gateway(s) User Guide 7 YML832 Rev2 • Speed Dial • Local phone book for peer -to-peer calling • E.164 Numbering & ENUM support • Hot-Line, Warm-Line support • Single Number / .
8 SmartVoice Gateway(s) User Guide YML832 Rev2 General Specifications • Power Adaptor : AC 100V~240V 50/60Hz input, DC 12V output • T emperature : Operation 0 °C ~ 45 °C • Storage -25 °C ~ 7.
SmartVoice Gateway(s) User Guide 9 YML832 Rev2 SmartVoice Gateway Hardware Description Front Panel (all models) • Power Indicator: Green light indicates a normal power supply . • Run Indicator: Blinking green light indicates normal operation. • Alarm Indicator: When the system starts up, the red light will blink.
10 SmartVoice Gateway(s) User Guide YML832 Rev2 Rear Panel (all models) Phone ports are telephone ports (FXS) to be connected to telephone sets or PBX CO ports. Line ports (FXO) are to be connected to PSTN lines (telephone lines from a PSTN network). NOTE: Do not connect FXS ports to each other .
SmartVoice Gateway(s) User Guide 11 YML832 Rev2 2. Installation and Applications Connecting your SmartVoice Gateway(s) 1. Connect the WAN port of your SmartV oice Gateway to your Broadband Modem using an ethernet cable. 2. Connect the power adapter to your SmartVoice Gateway and plug it into a powerpoint.
12 SmartVoice Gateway(s) User Guide YML832 Rev2 Network Connections Possible network connections are divided into 3 basic modes as described below: • Gateway can be assigned with a Public IP Add.
SmartVoice Gateway(s) User Guide 13 YML832 Rev2 Gateway behind a NA T/Firewall Network The VoIP gateway uses a private IP address and the Internet sharing function of other systems to connect to the Internet.
14 SmartVoice Gateway(s) User Guide YML832 Rev2 The table shown below lists possible solutions for different network scenarios. LAN IP address of Internet sharing Please avoid IP address 192.
SmartVoice Gateway(s) User Guide 15 YML832 Rev2 Gateway Assigned with a Public IP Address and Serving as an Internet Sharing Device The SmartVoice gateway will have a Public IP address, regardless of .
16 SmartVoice Gateway(s) User Guide YML832 Rev2 T elephone Connection Example of SmartVoice Gateway using FXS interfaces SmartVoice Gateway connecting directly to phone sets After connecting telephone sets to Phone1-Phone4, users can make direct calls (Phone1-Phone4 are FXS interfaces).
SmartVoice Gateway(s) User Guide 17 YML832 Rev2 Example of SmartVoice Gateway using FXO interfaces SmartVoice Gateway connecting directly to the T elephone Line of a PSTN Line1-Line4 are FXO interfaces and can all be connected to a PSTN to serve as a bridge between the PSTN and VoIP network.
18 SmartVoice Gateway(s) User Guide YML832 Rev2 Example of SmartVoice Gateway using a combination of FXS and FXO ports Phone1-Phone2 are FXS interfaces and can be directly connected to telephone sets for direct calls. Line1-Line2 are FXO interfaces and can be connected to PSTN lines to serve as a bridge between the PSTN and other VoIP telephones.
SmartVoice Gateway(s) User Guide 19 YML832 Rev2 3. Configuring the Gateway via WEB Browser The gateway also allows users to change gateway settings using a web browser . After opening a browser window , enter the gateway’ s IP address as the website address in order to enter the W eb configuration screen as shown in the following diagram.
20 SmartVoice Gateway(s) User Guide YML832 Rev2 Network Settings The network settings are used to set the gateway’ s communication ports, IP configurations, DNS and DHCP server etc.
SmartVoice Gateway(s) User Guide 21 YML832 Rev2 Setting Dynamic IP (DHCP) Click “DHCP” to obtain a Dynamic IP address, and then click the “Accept” button at the bottom of the screen. T o save the settings click System Operation to select “Sa ve Settings”, “Restart”, and then click the ”Accept” button.
22 SmartVoice Gateway(s) User Guide YML832 Rev2 BigPond Click “BigPond Cable”. Enter User Name and Password and then click the “Accept” button at the bottom. DNS Settings Domain Name Server (DNS): While a gateway is accessing another gateway or computer with a hostname, it will look up the IP address from the DNS provided by the ISP .
SmartVoice Gateway(s) User Guide 23 YML832 Rev2 LAN interface mode • Router: The system serves as a router . • Bridge: The system ser ves as a bridge between WAN port and LAN port. (LAN default gateway will still be accessible for configuration).
24 SmartVoice Gateway(s) User Guide YML832 Rev2 QoS Settings WAN QoS • QoS (Quality of Service): Sets true bandwidth of your Internet connection to ensure sound quality during transmission.
SmartVoice Gateway(s) User Guide 25 YML832 Rev2 NA T/DDNS (NA T T raversal) If a gateway is set up behind an Internet sharing device, you can select either the NA T or STUN protocol. • N A T Public IP: The IP address used b y the gateway should be a private address.
26 SmartVoice Gateway(s) User Guide YML832 Rev2 DDNS These settings are only necessary when the gatewa y is set up behind an Internet sharing device that uses a dynamic IP address and does not support DDNS. Y ou need to apply for an account with a DDNS ser vice from www .
SmartVoice Gateway(s) User Guide 27 YML832 Rev2 T elephony Settings Prefix Number Rules • T runk Dial Out Verify/ T runk Dial Out Replace: The system will transfer the number for all transit out calls through the FXO port. For example: If you transit out with 01907123456 , the system will replace it with 190601 907123456 .
28 SmartVoice Gateway(s) User Guide YML832 Rev2 • FXO Hunting Default Dial-Out: This will take effect as FXO Hunting VoIP call in option is set to Default Dial-Out . • FXO Line VoIP call in options: The usage of this option is as same as FXO Hunting VoIP call in option.
SmartVoice Gateway(s) User Guide 29 YML832 Rev2 • Group Hunting: Select group hunting when there is an incoming call and the gateway will automatically assign an unassigned call according to the Hunting Priority . If Line 2 does not want to be set as an assigned line to receive any inbound calls, the function can be disabled.
30 SmartVoice Gateway(s) User Guide YML832 Rev2 SIP Settings • All Call through OutBound Proxy: An outbound proxy server handles SIP call signaling as a standard SIP proxy server would. Furthermore, it receives and transmits phone conversation traffic (media) in between two communication parties.
SmartVoice Gateway(s) User Guide 31 YML832 Rev2 E.164 • International Call Prefix Digit: Enter the International call prefix. • Countr y Code: Select the desired country code. • Long Distance Call Prefix Digit: The long-distance prefix digit for making a long-distance call.
32 SmartVoice Gateway(s) User Guide YML832 Rev2 • Proxy Ser ver Realm: This is used for gateway SIP account authentica tion in a SIP server . In most cases, the gateway can automatically detect your SIP ser ver realm. So you can leave this option as blank.
SmartVoice Gateway(s) User Guide 33 YML832 Rev2 FXS/ FXO Representative number registers to Proxy: Assuming that your registered ID and password are individual, the settings should be as above: • FXS Representative Number: Register all FXS ports as a hunting group.
34 SmartVoice Gateway(s) User Guide YML832 Rev2 Private Network Users can establish a private network by using the Phone Book Manager Ser vice. The Phone Book Manager Service is different from using the Proxy . The gateway is able to register with the Phone Book Manager Service and the SIP Proxy at the same time.
SmartVoice Gateway(s) User Guide 35 YML832 Rev2 NOTE: When the ga teway is configured as Phone Book Manager server , it can also be configured as a client at the same time by enabling Register to Phone Book Manager option. This means the gateway also shares its Private Gateway Number to other clients which register on it.
36 SmartVoice Gateway(s) User Guide YML832 Rev2 Calling Features • Do Not Disturb: It will only be able to call out when it is enabled. All incoming calls will be restricted. • Unconditional Forward: All incoming calls will be forwarded to the “Forwarding Number” automatically .
SmartVoice Gateway(s) User Guide 37 YML832 Rev2 Advanced Options NOTE: There are two levels to enter W eb. Administrator is a ble to change all settings. Web UI only changes some settings. • Administrator’s name and P assword: Enter administrator name and password, which has the highest level of control of the gateway .
38 SmartVoice Gateway(s) User Guide YML832 Rev2 • Payload T ype: payload type of RFC2833. • Uses Second CPT for VoIP Call: This function is usually applied when the user selects VoIP as the primary path for outgoing calls and PSTN as the backup.
SmartVoice Gateway(s) User Guide 39 YML832 Rev2 Line Settings • Listening Volume: Adjusts the hearing volume. • Speaking Volume: Adjusts the speaking volume. • T one Volume: This setting will be applied to all tones generated b y the VoIP gateway including Dial T one, Busy T one, and so on.
40 SmartVoice Gateway(s) User Guide YML832 Rev2 Codec Settings • Preferred Codec T ype: Since dif ferent voice codecs have different compression ratios, so the sound quality and occupied bandwidths will also be different. It is recommended that you use the default provided (G.
SmartVoice Gateway(s) User Guide 41 YML832 Rev2 Fax Settings • T .38: The T .38 protocol is used for better and faster facsimile transmission. So it is recommended to enable this function to gain better fax quality . When this function is enabled, please select UDP or TCP .
42 SmartVoice Gateway(s) User Guide YML832 Rev2 Drop Inactive Call • Silence Detection Threshold: The volume below the threshold is used as a standard to determine whether or not to hang up the phone.
SmartVoice Gateway(s) User Guide 43 YML832 Rev2 Digit Map There are 50 sets of leading digit entries to choose voice routing interface – Auto select, PSTN or VoIP . • Default Call Route: The default call route can be Auto, V oIP , PSTN and Deny .
44 SmartVoice Gateway(s) User Guide YML832 Rev2 Phone Book The system can set up and store 100 phone numbers in the phone book and provide an IP address query when calling other Gateway(s).
SmartVoice Gateway(s) User Guide 45 YML832 Rev2 Speed Dial This system can set up 100 numbers for speed dialing. Setting methods are as follows: Method 1- Single mapping: Fill a short code into the “Speed Dial Code” column, and enter the desired phone number into the “Number T o Dial” column.
46 SmartVoice Gateway(s) User Guide YML832 Rev2 Caller Filter This function is used to allow or deny the SIP Invite message from the Proxy list ONL Y . • Filter IP Address: Enter the IP address that you would like to allow/deny . • Subnet mask: Enter the subnet mask that is applied to the IP that entered in the Filter IP address field.
SmartVoice Gateway(s) User Guide 47 YML832 Rev2 T ransit Call Control If you wish to restrict a general user (one who is not required to enter the PIN code) to local calls only and prohibit him/her from making long-distance calls started with a prefix “0”, do the following steps: 1.
48 SmartVoice Gateway(s) User Guide YML832 Rev2 Dialing principle to enable PIN code *Inbound Call Control PIN Code * Outbound Call Control PIN Code * Phone number Using * to the separate PIN code and the phone number based on actual settings. The PIN can also be omitted.
SmartVoice Gateway(s) User Guide 49 YML832 Rev2 Long-Distance Control T a ble This table controls the level of authority of an outgoing (transit out) call that is dialed through FXO and diverted to PSTN, as below: Descriptions: • Digit strings in this table are prefixes that the gatewa y will check on dialed numbers in transit out calls.
50 SmartVoice Gateway(s) User Guide YML832 Rev2 CPT/Cadence Settings CPT/Cadence setting parameters serve as the basis of an FXO interface to determine whether or not a PSTN-call receiving party has hung up the phone.
SmartVoice Gateway(s) User Guide 51 YML832 Rev2 NOTE: T o cope with different local PSTN and different PBX models, the system provides auto busy tone cadence learning to prevent the FXO from engaging a line.
52 SmartVoice Gateway(s) User Guide YML832 Rev2 Direct Connection to PSTN Note: The above diagrams show a 4-port SmartVoice gateway for illustration purposes. An 8 port SmartVoice gateway could also be used depending upon your network requirements. • Connect one of the trunk lines to the Gateway FXO Port.
SmartVoice Gateway(s) User Guide 53 YML832 Rev2 Once detection of a busy tone is in progress, the system will dial the number to be tested (in this case 36008913). After it rings pick up the phone and enter”#”, then hang up. The system will then detect a busy tone automatically .
54 SmartVoice Gateway(s) User Guide YML832 Rev2 Connected to a PBX Extension Line If the gateway is connected to a PBX extension line, then the busy tone of both the PBX and the PSTN must be detected.
SmartVoice Gateway(s) User Guide 55 YML832 Rev2 Connected to a PBX extension line to detect the busy tone of PSTN 36008913 307 301 36 0 08 914 Note: The above diagrams show a 4-port SmartVoice gateway for illustration purposes. An 8 port SmartVoice gateway could also be used depending upon your network requirements.
56 SmartVoice Gateway(s) User Guide YML832 Rev2 Filling in the CPT T able Fill in the table after the detection is completed as below , where the values are the frequency and On- and-Off ratio detected.
SmartVoice Gateway(s) User Guide 57 YML832 Rev2 Current Status and System Information These two pages show that the status of V oIP Ga teway . There are Port Status, Server Registra tion Status, WAN Port Information, LAN Port Informa tion and Hardware.
58 SmartVoice Gateway(s) User Guide YML832 Rev2 RTP Packet Summary Displays the information of the last finished call. It contains peer IP , peer port, packets sent, packet received and packet lost. Press the Refresh button to get the latest RTP Packet Summary .
SmartVoice Gateway(s) User Guide 59 YML832 Rev2 STUN Inquiry Using “STUN Inquiry” to detect your IP sharing device’ s NA T type and communication between STUN server and client (built-in SmartVoice gateway).
60 SmartVoice Gateway(s) User Guide YML832 Rev2 Ping T est Use “ping” to identify if the remote peer is reachable. Fill in remote IP address and click “T est” will start the test.
SmartVoice Gateway(s) User Guide 61 YML832 Rev2 Port Filtering Port filtering enables you to control all data that can be transmitted in routers; principles of filtering- --When the port used at the source end is within the limited scope , it will be filtered without transmission.
62 SmartVoice Gateway(s) User Guide YML832 Rev2 IP Filtering IP Filtering is to limit internal users from accessing the Internet. • IP: Input the IP address that you want to filter; the limited IP address will be unable to transmit the data to the Internet.
SmartVoice Gateway(s) User Guide 63 YML832 Rev2 MAC Filtering MAC (Media Access Control) address filtering is to filter the transmission of data by network card physical address.
64 SmartVoice Gateway(s) User Guide YML832 Rev2 Virtual Server Enabling the users on Internet to access the WWW , FTP and other services under your NA T .
SmartVoice Gateway(s) User Guide 65 YML832 Rev2 DMZ Lets the server on the LAN to be directly exposed to the Internet for accessing da ta. Either this function or the virtual server can be selected for use.
66 SmartVoice Gateway(s) User Guide YML832 Rev2 URL Filter URL filter is used to deny device from LAN accessing specific web sites. The system will block the URL that contains the string.
SmartVoice Gateway(s) User Guide 67 YML832 Rev2 Special Applications Provide multiple connections for special applications. • Name: The name of the special application. • Incoming T ype: The protocol used by the special application. • Incoming Port range: Port range on the WAN side that will be used to access the application.
68 SmartVoice Gateway(s) User Guide YML832 Rev2 DoS Prevention Settings • Enable DoS Prevention: T o prevent DoS from WAN. • Enable DoS Prevention on LAN: T o prevent DoS from LAN. • Packet/Second: If the same type of packets received in one second is more than the specified value, then it will be treated as attacks.
SmartVoice Gateway(s) User Guide 69 YML832 Rev2 • Enable Source IP Blocking: Block the IP . • Blocking Time: The time to block the IP ..
70 SmartVoice Gateway(s) User Guide YML832 Rev2 NTP (Network Time Protocol) Time Zone: Set the Time Zone where VoIP gateway resides. Time Server #1~#3: Set the Time Server where VoIP gateway should sync up during start up. (NTP protocol) Backup and Restore (Configuration) Y ou can backup settings to a file and restore settings from that file.
SmartVoice Gateway(s) User Guide 71 YML832 Rev2 Provision Settings Options in this section are only required for VoIP networks in which provisioning system has implemented. Fill in the parameters needed of Provision Server from your ser vice provider .
72 SmartVoice Gateway(s) User Guide YML832 Rev2 System Operations (Save Settings) Some settings are effective by Restart . Remember to save all settings by Save Settings before to restart. • Save Settings: Save settings after completing. The new settings will take effect after the system is restarted.
SmartVoice Gateway(s) User Guide 73 YML832 Rev2 Software Upgrade Gateway provides software upgrade function from a remote end. Please consult your service provider for all following details. • Upgrade Ser ver: Choose the server type. • Software Upgrade Ser ver IP: Enter the software server IP address.
74 SmartVoice Gateway(s) User Guide YML832 Rev2 Logout Gateway only allows one user to login at a time, so whenever a change is made, please save the settings, restart the system, or logout to avoid the situation where other users cannot login to change settings.
SmartVoice Gateway(s) User Guide 75 YML832 Rev2 4. Configuring the Gateway via IVR Preparation • Install the Gateway according to the instructions as described in Chapter 2. • If a static IP is used, confirm the desired IP settings of the WAN Port (IP address, Subnet Mask, and Default gateway).
76 SmartVoice Gateway(s) User Guide YML832 Rev2 IVR (Interactive Voice Response) The gateway provides a convenient IVR function. Users only need to pick up a handset and enter the function code for the query and setting. A PC is not required. NOTE: After finishing the settings, make sure the new settings are saved.
SmartVoice Gateway(s) User Guide 77 YML832 Rev2 IVR Functions T able Function Code Description Example 111/101 WAN Port IP address Set/Query Use in conjunction with function code 114 , select 1 for a Static IP function.
78 SmartVoice Gateway(s) User Guide YML832 Rev2 Function Code Description Example 215/205 Set/Query Gateway T elephone Number (Representative Number) 216/206 Set/Query the extension number of Line 1.
SmartVoice Gateway(s) User Guide 79 YML832 Rev2 IP Configuration Settings (WAN port) Static IP Settings NOTE: Complete static public/private IP settings should include a static IP (Option 1 under 114), IP address (111), Subnet Mask (112), and Default Gateway (113).
80 SmartVoice Gateway(s) User Guide YML832 Rev2 Select PPPoE • After entering IVR mode, dial 114 . • After hearing “ Enter value ”, dial 3 (to select PPPoE). PPPoE Account Settings • After entering IVR mode, dial 121 . • After hearing “ Enter v alue ”, enter the account number , followed by ” # ”.
SmartVoice Gateway(s) User Guide 81 YML832 Rev2 PPPoE Character Conversion T able Number Input Key Upper Case Letter Input Key Lower Case Letter Input Key Symbol Input Key 0 00 A 11 A 41 @ 71 1 01 B 1.
82 SmartVoice Gateway(s) User Guide YML832 Rev2 5. Dialing and dialed number routing principle Instruction • After a phone number is entered, dial # to call out immediately or , wait until the “Inter DTMF Timeout” expires (defined in “Advanced Options”, default=4 seconds).
SmartVoice Gateway(s) User Guide 83 YML832 Rev2 Start Enter a phone number (D#) Is (D#) defined in Speed Dial table? Does this gateway has an FXO p ort? End Dial out as defined in the first match case.
84 SmartVoice Gateway(s) User Guide YML832 Rev2 Appendix A: Glossar y 10BASE-T A designation for the type of wiring used by Ethernet networks with a data rate of 10 Mbps. Also known as Category 3 (CAT 3) wiring. See also data rate, Ethernet. 100BASE-T A designation for the type of wiring used by Ethernet networks with a data rate of 100 Mbps.
SmartVoice Gateway(s) User Guide 85 YML832 Rev2 DHCP relay Dynamic Host Configuration Protocol relay. A DHCP relay is a computer that forwards DHCP data between computers that request IP addresses and the DHCP server that assigns the addresses. Each of the My ADSL Modem’s interfaces can be configured as a DHCP relay .
86 SmartVoice Gateway(s) User Guide YML832 Rev2 hop When you send data through the Internet, it is sent first from your computer to a router , and then from one router to another until it finally reaches a router that is directly connected to the recipient.
SmartVoice Gateway(s) User Guide 87 YML832 Rev2 Microfilter In splitterless deployments, a microfilter is a device that removes the data frequen- cies in the DSL signal, so that telephone users do not experience interference (noise) from the data signals.
88 SmartVoice Gateway(s) User Guide YML832 Rev2 protocol A set of rules governing the transmission of data. In order for a da ta transmission to work, both ends of the connection have to follow the rules of the protocol. remote In a physically separate location.
SmartVoice Gateway(s) User Guide 89 YML832 Rev2 TFTP T rivial File T ransfer Protocol. A protocol for file transfers, TFTP is easier to use than File T ransfer Protocol (FTP) but not as capable or secure. TTL Time T o Live A field in an IP packet that limits the life span of that packet.
90 SmartVoice Gateway(s) User Guide YML832 Rev2 Appendix B: Cable Information This cable information is provided for your reference only . Please ensure you only connect the appropriate cable into the correct socket on either this product or your computer .
SmartVoice Gateway(s) User Guide 91 YML832 Rev2 Straight and crossover cable configuration There are two types of the wiring: Straight-Through Cables and Crossover Cables. Categor y 5 UTP/STP cable has eight wires inside the sheath. The wires form four pairs.
92 SmartVoice Gateway(s) User Guide YML832 Rev2 Appendix C: Registration and Warranty Information All NetComm Limited (“NetComm”) products have a standard 12 month warranty from date of purchase against defects in manufacturing and that the products will operate in accordance with the specifications outlined in the User Guide.
SmartVoice Gateway(s) User Guide 93 YML832 Rev2 Product Warranty The warranty is granted on the following conditions: 1. This warranty extends to the original purchaser (you) and is not transferable; 2. This warranty shall not apply to software programs, batteries, power supplies, cables or other accessories supplied in or with the product; 3.
NetComm Limited ABN 85 002 490 486 PO Box 1200, Lane Cove NSW 2066 Australia E – sales@netcomm.com.au W – www .netcomm.com.au.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il NetComm Gateway Series è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del NetComm Gateway Series - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso NetComm Gateway Series imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul NetComm Gateway Series ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il NetComm Gateway Series, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del NetComm Gateway Series.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il NetComm Gateway Series. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo NetComm Gateway Series insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
