Manuale d’uso / di manutenzione del prodotto Remote Port Security Device del fabbricante AT&T
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AT&T DEFINITY ® Communications System Remote Port Security Device User’s Manual.
© 1991 AT&T All Rights Reserved Printed in USA While reasonable effort was made to ensure that the information in this document was complete and accurate at the time of printing, AT&T can not assume responsibility for any errors.
IMPORTANT SAFETY INSTRUCTIONS To reduce the risk of injury from fire or electric shock, always follow the basic safety precautions when using this product. The safety symbol (exclamation point inside a triangle) on the RPSD Lock or RPSD Key alerts you to the important operating and maintenance instructions below.
16 This product should be operated only from the type of power source indicated on the power transformer (see Item 18 below). If you are not sure of the type of power supply to your business or home, consult your local power company.
FCC Notices Part 15, Subpart A This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Contents 1 Getting Started Getting Started 1-1 Audience 1-4 Responsibilities 1-4 In This Document 1-5 Typographical Conventions 1-5 Hotline or Other Service Call Numbers/Addresses 1-6 2 Installation I.
3 RPSD System Administration RPSD RPSD System Administration Time of Day Access System Activity Log Single Point Administration Enable/Disable (Block) AT&T and Other Key Users Force Connect/Discon.
4 RPSD Key Use RPSD Key Use 4-1 Access Failure Messages 4-2 Last Call Status Test 4-2 RPSD Key User Command Set 4-3 U - Set User ID 4-4 K - Set Secret Key 4-4 N - Set Device Number 4-5 L - List User I.
List of Figures Figure 1-1 1-2 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 B-1 B-2 Protection Process RPSD Lock and Key Configuration Bypass Connections RPSD Lock RPSD Key Common RPSD Lock Configuration .
List of Tables Table Page 2-1 2-2 3-1 4-1 2-16 2-23 3-3 4-2 5-4 A-1 B-2 B-3 5-1 A-1 B-1 B-2 Aux. Port, Terminal, and Printer Pinouts Cables, Connectors, and Ports Access Failure Messages Access Failur.
1 Getting Started Getting Started Audience Responsibilities In This Document Typographical Conventions Hotline or Other Service Call Numbers/Addresses 1-1 1-4 1-4 1-5 1-5 1-6.
Getting Started The DEFINITY ® Remote Port Security Device (RPSD) is a single line dial-up port protection system that prevents unauthorized access to a host resource.
The RPSD system protects a port in the following manner: a call into the channel to the protected host activates the RPSD Lock. Without involving the protected host resource or its associated modem, the RPSD Lock performs a verification of the caller’s identity through a set of communications with the RPSD Key using DTMF signaling.
The RPSD Lock device is approximately the size of a modem and is connected between the PBX modem and the Central Office (CO) line. The RPSD Key device is of similar size and is connected between the client’s (caller’s) modem and CO line. See Figure 1-2.
Audience This document is intended for the following audience: ■ AT&T Technicians ■ RPSD System Administrators ■ RPSD Key Users AT&T Technicians refers to the personnel from AT&T who install the RPSD Lock device at the customer premises.
In This Document This document comprises the following material: ■ ■ ■ ■ Chapter 1: Getting Started provides an overview of the RPSD system, a description of this document and its intended audience, and an explanation of typographical conventions.
Hotline or Other Service Call Numbers/Addresses If assistance is needed with the RPSD Lock, Key, or the PBX, or problems occur in the RPSD Lock or Key that cannot be resolved by using Chapter 5, Troub.
2 Installation Installation 2-1 Room Layout/Environment 2-3 2-3 2-4 Power Supply Location of Administration Terminal or Printer Hardware Components RPSD Lock RPSD Power Monitor Adapter PBX s Other Mod.
Installation This chapter describes the recommended room layout and environment, hardware components, installation procedures, and testing for the RPSD. In addition to this chapter, you may wish to refer to Appendix A, Cables, Connectors, and Ports Tables for quick reference materials on the installation of the hardware components.
2-2 Installation.
Room Layout/Environment While the location of the RPSD Lock is not critical to its function, it is best if the Lock is kept in an equipment cabinet near the PBX modem. This helps protect the Lock against dust and other precipitate, as well as protecting against physical damaging from being knocked to the floor or having things dropped on it.
Location of Administration Terminal or Printer For the purposes of installation, it is simplest if the RPSD Lock or Key administration terminal or printer is co-located with the RPSD Lock or Key.
Hardware Components When you order the RPSD Lock device, you receive the Lock, power supply, a 7-foot cable with modular connectors on each end, and a 14 foot cable with modular connectors on each end. If any other cables or connectors are required, they must be ordered separately.
RPSD Power Monitor Adapter The Power Monitor Adapter (PMA) (Comcode 406453662) provides an installation option that allows you to control the behavior of the RPSD during power failure conditions.
A second pair of RJ11 port connections may be installed for simple bypass of the RPSD Lock. To bypass the Lock, the modular connection cords are removed from the RPSD Lock Telco and Subscriber ports and connected to the bypass connection block, which connects the line directly.
FRONT BACK FIGURE 2-2 RPSD Lock PBXs AT&T supports RPSD use on the following types of PBXs: ■ System 75 (R1V2, R1V3) ■ System 85 (R1V1, R1V2, R2V1, R2V2, R2V3, R2V4) ■ DEFINITY Generic 1 (all models) ■ DEFINITY Generic 2 (all models) ■ Dimension® PBX To install the RPSD Lock you must locate the CO line used for RMATS service.
Other Other dial-up port applications may be supported. To install an RPSD Lock device for these applications, locate the CO line used to service that port and install the Lock as you would for the remote maintenance and administration application. Modems The RPSD Lock works with any modem that may be used with the PBX.
RPSD Key The RPSD Key is similar to the RPSD Lock in size and appearance. Like the RPSD Lock, the RPSD Key has seven LEDs on the front panel and four ports on the back panel. For a detailed description of the front panel LEDs, see Appendix B, Front Panel LEDs.
Hardware Installation Procedures It is absolutely required that the first step in installing the RPSD Lock device is to inform the INADS System Administrator at the local or central technical support center when the installation will take place and that the channel will be down at that time.
FIGURE 2-4 Common RPSD Lock Configuration The Lock is installed between the CO line and the PBX modem. The modem location depends on the type of PBX. The modem is located: ■ on the circuit pack for .
You will need the following components to install the RPSD Lock: ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ RPSD Lock device the CO line assigned as the RMATS channel (on customer premises) the PBX modem.
Modular Plug RJ11 Jack CO Line (RMATS Channel) Modular Plug FIGURE 2-5 RPSD Lock to CO Line (RMATS Channel) Connecting the RPSD Lock to the PBX Modem The 212A modem has a DB25 input, so the connection to the RPSD Lock must be adapted to connect the tip and ring from a modular plug to a DB25.
Modular Plug PBX Modem Modular Plug FIGURE 2-6 RPSD Lock to Modem Connecting the RPSD Lock to the Administration Terminal or Printer You will need the following hardware components to connect the RPSD.
To connect the RPSD Lock device to the administration terminal or printer, use the following procedure: 1 Using Table 2-1, make up a DB25 connector with EIA-RS232 cable for the Aux. Port of the RPSD Lock. 2 Make up the appropriate connector for the terminal or printer according to the pin descriptions in Table 2-1.
FIGURE 2-7 RPSD Lock to Administratlon Terminal or Printer Hardware Installation Procedures 2-17.
2 3 4 5 6 7 8 20 22 Transmit Data Receive Data Request to Send Clear to Send Data Set Ready Signal Ground Data Carrier Detect Data Terminal Ready Ring Indicator RPSD Terminal or Printer 2 3 4 5 6 7 8 .
2 3 4 5 6 7 8 20 2 3 4 5 6 7 8 20 RPSD (DCE) FIGURE 2-9 Printer (DCE) DB25 Connections From RPSD Lock or Key to Data Communications Equipment Obtain further information for the specific terminal or printer in use from the documentation accompanying them.
AC Outlet FIGURE 2-10 RPSD Lock Power Supply Installing the RPSD Key The RPSD Key is installed between the user’s terminal and modem. To install an RPSD Key device, you need: ■ ■ ■ ■ ■ ■.
Connecting the RPSD Key to the Terminal The RPSD Key is connected to the terminal via the Aux. Port on the back of the RPSD Key device and the terminal’s RS-232 port. Obtain or make up a cable with the RS-232 wire, the RS-232 connector on one end, and the DB25 connector (male) on the other end.
Power-Up Behavior of Uninitialized Key With an uninitialized Key, the left four LEDs will all light up upon power-up. If any other behavior occurs, there is a firmware error and the Key should be replaced.
Cables, Connectors, and Ports Table Table 2-2 shows the cables, connectors, and ports required to install the RPSD system. This table includes optional connections as well as the basic configuration. TABLE 2-2 Cables, Connectors, and Ports Part From To modular connector 6 position wire modular connector 1 7 ft.
2-24 Installation.
Software Components The software for the RPSD system is contained within the hardware components and does not need to be loaded separately. Additionally, if you are not installing an RPSD Key or Keys, you need only set the date and time for the RPSD Lock and, in the case of multiple Locks, a Lock ID.
Initializing an RPSD Key Initialization of an RPSD Key involves both the Key and the RPSD Lock. On the Lock, the Key User ID in question must be added using the Add User command. See Chapter 3, System Administrator Command Set for the procedure for using the Add User command.
Test RPSD Lock Installation The Self Check tests the health of the RPSD Lock. If the correct response is received when the test is run, the RPSD Lock is functioning properly. To perform the Self Check, dial the RMATS channel from a touch-tone telephone.
3 RPSD System Administration RPSD System Administration 3-1 Time of Day Access 3-1 System Activity Log 3-2 Single Point Administration 3-4 Enable/Disable (Block) AT&T and Other Key Users 3-4 Force.
RPSD System Administration The RPSD Lock device prevents unauthorized access to the RMATS channel on your PBX. In administering the RPSD, keep in mind that access via telephone lines is not the only means of breaching the security of your system.
System Activity Log The System Activity Log retains a log history of the last 60 status messages generated by the RPSD Lock. As a new message is generated, the oldest message in the buffer is deleted. The most recent twenty messages are sent to the RPSD Lock administration terminal or printer and displayed or printed in real-time.
The fields of the System Activity Log entries are: Log ID provides the ID of the Lock associated with the system activity message. Sequence numbers each message in sequence. The sequence goes from 000 to999 Number and then restarts at 000. Date provides the date of the message.
Single Point Administration A single administration terminal or printer can be used to administer multiple Locks. To do so, you will need to either administer the Locks from tty ports via the UNIX ® Operating System, or you can use, in the case of printers, a printer sharing device.
Authorized Keys You may have up to twenty-five RPSD Key user IDs on the RPSD Lock. Ten RPSD Key user IDs are reserved as permanent for AT&T personnel to administer and maintain the PBX, peripheral, or adjunct via the RMATS port. These user IDs cannot be deleted.
3-6 RPSD System Administration.
RPSD System Administrator Command Set This section describes the commands available on the RPSD Lock and their syntax. The procedures in which the commands are used have been described earlier in this chapter. This material is provided as a quick reference.
Optionally, a single Key can be used to access multiple Locks. This is done by entering the [secret_key] information when adding that Key. The same [secret_key] information is then used when adding that Key to other Locks. The information is then used to generate the test responce.
B - Block User Syntax: b <user_id> [ RETURN ] Blocks an RPSD Key user from access to the RMATS channel. Both permanent and non-permanent users may be blocked. In the syntax line above, b is the command and <user_id> is the user ID. To determine whether a user is already blocked, or to check the user IDs, use the List User Table command.
T - Test User Syntax: t <user_id> [ RETURN ] Returns a seven-digit, pseudo-random code to be matched by a code from the specified RPSD Key user. This is used to check whether the RPSD Key has been seeded properly with the secret information.
L - List User Table Syntax: l [ RETURN ] or l <full_or_partial_user_id> [ RETURN ] The List User Table command lists information regarding all users if no user ID is specified.
The fields of the List User Table screen are: User ID Provides the user ID. Blocked? States whether a Block command has been issued for that user. The default is no block. If a user is not blocked, the field is left blank. Blocks can be issued on both permanent and non-permanent users.
Third Sample Command and Response: The following is a sample of the output returned by using the second syntax example, which lists all users beginning with the same characters.
CR - Change Restriction Syntax: cr <restr_id,start(hh:mm),end(hh:mm),day_no.> [ RETURN ] The Change Restriction command is used to set the list of time restrictions that may be placed on a user or users. Time restrictions block access to the RMATS channel for a specified portion of time on a specified day or days.
start(hh:mm) The beginning time of the restriction in 24 hour clock format. In the sample above, the beginning time for restriction IDA is 20:00, which is 8:00PM. Note: You must use the colon (:) as a separator between the hours and minutes or the entry will not work.
LR - List Restrictions [ RETURN ] Syntax : lr or lr <restr_id> [ RETURN ] The List Restrictions command is used to list the time restrictions that have been administered. Up to 14 separate restrictions maybe created (A-N). The first syntax example above will list the time restrictions for all restriction IDs A to N.
UR - User Restrictions Syntax: ur <full_or_partial_user_id, restr_id(s)> [ RETURN ] The User Restrictions command is used to assign time restrictions to a user or set of users.
LH - Log History Syntax: lh [ RETURN ] Displays the last sixty messages in the System Activity Log. The messages are displayed twenty to a page with a total of three pages. – More to Come – appears at the bottom of the first two pages and – End of List – appears at the bottom of the last (third) page.
The fields of the Log History screen are: Log ID provides the ID of the Lock associated with the system activity message. Sequence numbers each message in sequence. The sequence goes from 000 to 999 Number and then restarts at 000. Date provides the date of the message.
AH - Access History Syntax: [ RETURN ] ah The Access History command displays details regarding the last twenty accesses of the RMATS channel for both incoming and outgoing calls.
FH - Failure History Syntax: fh [ RETURN ] The Failure History command displays a log of the last twenty failed access attempts and the details of those calls.
ST - Status Display Syntax: st [ RETURN ] The Status Display command displays the version, date, time, communications parameters, and current status of the RPSD Lock. Sample Command and Response: > st AT&T RPSD/JPLock01 - V1.1a Firmware V2.Ot Init.
LS - List Statistics Syntax: ls [ RETURN ] The List Statistics command displays a statistical summary of call attempts and failures, both cumulative and since the last time the statistical summary was reset. The summary is reset by the administrator using the Reset Statistics command, described in this section.
RS - Reset Statistics [ RETURN ] Syntax: rs [ RETURN ] Entering r S resets the access attempts statistics to zero. This command does not reset cumulative totals.
FD - Force Disconnect Syntax: fd [ RETURN ] The Force Disconnect command disconnects a call in progress. This might be used to clear the channel for a higher priority call. The Lock will request confirmation of a Force Disconnect command. If a Force Disconnect command is issued when no call is in progress, an error message will be returned.
C - Clock Set Syntax: c <hh:mm> [ RETURN ] Set the clock to local time standards in 24 hour clock format (for example, 16:00 for 4:00 PM). The clock must be set in order to ensure the accuracy of the System Activity Log and also because the clock is used by the RPSD Lock for enabling and disabling time restrictions.
SC - Set Communications Parameters Syntax: sc <speed,length_parity> [ RETURN ] The Set Communications Parameters command is used to set the communications link speed, character length, and parity on the serial port. The default setting is 9600 baud, 8 bit, no parity.
Help Screens To obtain a help screen for any command, enter a question mark (?) followed by the command and [ RETURN ]. Sample Help Request and Help Response: > ?i Command: I - ID Set Function: Set ID to precede all log messages from this device.
4 RPSD Key Use RPSD Key Use 4-1 Access Failure Messages 4-2 Last Call Status Test 4-2 RPSD Key User Command Set U - Set User ID K - Set Secret Key N - Set Device Number L - List User Information H - H.
RPSD Key Use When the RPSD system is working correctly, Key use and authentication should be almost invisible to the RPSD Key user. The user dials the RMATS channel from the user’s terminal, authent.
Access Failure Messages Table 4-1 describes the access failure messages and their meanings. Access failure messages do not necessarily mean that an error has occurred.
RPSD Key User Command Set The RPSD Key device displays a different Menu of Commands to standard output depending on whether the device is in a virgin state.
U - Set User ID Syntax: u <user_id> [ RETURN ] The Set User ID command is used to enter a name that will identify the RPSD Key to the RPSD Lock. This command is only used when initializing a Key in the virgin state. See Chapter 2, Initializing an RPSD Key for a complete description of the procedure which uses this command.
N - Set Device Number Syntax: n <number> [ RETURN ] The Set Device Number command enters a number from 100 to 9999999 as an identifier for the RPSD Key device. Use this command when you have two or more RPSD Keys with the same user ID. The device number is associated with the Key for the purpose of identification by the RPSD Lock.
H - History Display Syntax: h [ RETURN ] The History Display command displays a log history of the last twenty messages generated by or sent to the RPSD Key device. See Table 4-1 for an explanation of the status messages sent to the Key by the RPSD Lock when a connection attempt fails.
D - Date Set Syntax: d <mm/dd/yy> [ RETURN ] The Date Set command is used to set the date for the RPSD Key’s internal calendar. You should set the date when you begin using the Key just to be certain that it is correct. To check the date you can use the Status Display command described in this section.
I - Set Log ID Syntax: i <log_id> [ RETURN ] The Set Log ID command is used to identify which Key is associated with which status message. This is especially important where multiple devices share a single administration terminal. The command adds the ID to the beginning of each message generated by the Key.
S - Status Display Syntax: s [ RETURN ] The Status Display command displays the current status of the RPSD Key to the user’s terminal. To use this command, enter s [ RETURN ] at the > prompt. Sample Command and Response: >s AT&T RPSD/KEY11 - V1.
SC - Set Communications Parameters Syntax: sc <speed,length_parity> [ RETURN ] The Set Communications Parameters command is used to set the communications link speed, character length, and parity on the serial port. The default setting is 9600 baud, 8 bit, no parity.
W - Wipe Out Syntax: w [ RETURN ] The Wipe Out command will erase the user ID, secret key information, and device ID of the RPSD Key and return it to a virgin state. If the Wipe Out command is used, the Key will be unable to access the RPSD Lock unless the entire initialization procedure is performed again.
5 Troubleshooting Troubleshooting 5-1 Access Failure Messages 5-3 Testing the RPSD Lock 5-7 Built-in Diagnostics 5-7 Self Check 5-8 Last Call Status Test 5-8 Modem Ring Test 5-9 Hardware Replacement 5.
Troubleshooting This chapter provides a basis for establishing the cause of trouble or access failure with your RPSD system. In the event that you are unable to determine the cause of the problem or r.
5-2 Troubleshooting.
Access Failure Messages When calls to the RPSD Lock are disconnected without reaching the PBX modem, the Lock generates an access failure message that is sent to standard output and saved in the system activity log.
TABLE 5-1 Access Failure Messages Code No. Message Meaning Action 1 No RPSD/Key No RPSD Key First test the RPSD Lock using the Self Detected was detected on Check described in Testing the RPSD Lock the caller’s line.
TABLE 5-1 (Continued) Access Failure Messages Code No. Message Meaning 4 Blocked User 5 Invalid Response 6 Outgoing Call 7 Ring - No Answer 8 Force Disconnect The administrator placed a block on the caller’s RSPD Key user ID. The RSPD Key responded to the RSPD Lock’s challenge, but the response was incorrect.
Code No. 9 Message Time Restriction TABLE 5-1 (Continued) Access Failure Messages Meaning The call was placed during a time of day when the Lock is restricted from taking any calls. Action No action necessary. This is a deliberate restriction placed on access to the RSPD Lock by the administrator.
Testing the RPSD Lock There are two ways in which the RPSD Lock can be tested to determine the cause of access failures and whether the Lock or some associated piece of hardware is malfunctioning.
Self Check The Self Check tests the health of the RPSD Lock. To perform the Self Check, dial the RMATS channel from a touch-tone telephone. When the call is answered, you hear a short tone (indicating a connection to the RPSD Lock). Press 1 ✱ on the telephone pad.
Modem Ring Test The Modem Ring Test tells you whether the call attempts are getting through to the modem. If there is a problem with the RPSD Lock, the PBX modem, or the cabling, the call will not reach the modem. The likeliest result, in the case of a problem, is a Ring No Answer.
Replacing the PBX Modem To test whether the problem diagnosed by the Modem Ring Test is in the PBX modem, perform the following procedure: 1 2 3 4 5 6 7 Disconnect the modular telephone plug from the PBX modem and connect a touch-tone telephone to the modem.
Replacing the Lock or Key If an RPSD Lock must be replaced, the service call is classified as the highest priority because a failed Lock prevents all access to or from the RMATS channel. The RPSD Lock may be removed from the line and, to maintain access to the RMATS channel, the modem may be connected directly to the CO line.
5-12 Troubleshooting.
Saving the Key Seed Value All of the secret information used to initialize the RPSD Lock should be saved in a secure location. If a Lock needs to be replaced, you will want to initialize the replacement Lock with the same information as the original.
A Cables, Connectors, and Ports Table Cables, Connectors, and Ports Table A-1.
Cables, Connectors, and Ports Table Table A-1 shows the cables, connectors, and ports for installing the RPSD system. This table includes optional connections as well as the basic configuration.
B Device LEDs Front Panel LEDs B-1 RPSD Lock B-1 RPSD Key B-2.
Front Panel LEDs Both the RPSD Lock and the RPSD Key have seven LEDs each on their front panels. The following sections explain the meaning of each LED and their various states. RPSD Lock FIGURE B-1 RPSD Lock LEDs The first LED on the left is the red Power light.
Table B-1 explains the status of the RPSD Lock when the different LEDs are lit. TABLE B-1 RPSD Lock LEDs LED Meaning 1 On On On 2 On Off Off 3 Off On Off 4 Off Off On 5 Off Off Off 6 Off Off Off 7 Off Off Off On Off Off Off On Off Off An incoming call is being processed.
Table B-2 explains the status of the RPSD Key when the different LEDs are lit. TABLE B-2 RPSD Key LEDs LED Meaning 1 2 3 4 5 6 7 On On Off Off Off Off Off An incoming call is being processed. On Off On Off Off Off Off Should only light when it blinks on power-up.
Index F A AC outlet, 2-3 Access failure messages, 3-3, 4-2, 5-3 RPSD Key, 4-1, 4-2 Access history command, 3-20 screen explained, 3-20 Add user command, 3-7 Administration printer connection, 2-9 loca.
L Last call status test, 4-2, 5-7, 5-8 procedure, 5-8 List Commands, statistics, 3-23 user information, 4-5 user table, 3-11 Log history command, 3-18 M Modem ring test, 5-7, 5-9 procedure, 5-9 Modems.
Set communications parameters command, 3-27 status display command, 3-22 test user command, 3-10 unblock user command, 3-9 user restrictions command, 3-17 Remove user command, 3-10 Replacing the Lock .
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 AT&T Remote Port Security Device 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 AT&T Remote Port Security Device - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso AT&T Remote Port Security Device imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul AT&T Remote Port Security Device ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il AT&T Remote Port Security Device, 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 AT&T Remote Port Security Device.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il AT&T Remote Port Security Device. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo AT&T Remote Port Security Device 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.
