W&T 58620 User Manual

Release 2.0, January 2010

Model 58620

Firmware 2.10 or higher

Manual

LAN-Modem

W&T

Since it is posssible that we make mistakes, you mustn’t use any of our statements without verification. Please, inform us of any error or misunderstanding you come about, so we can identify and eliminate it as soon as possible.

Carry out your work on or with W&T products only to the extent that they are described here and after you have completely read and understood the manual or guide. We are not liable for unauthorized repairs or tampering. When in doubt, check first with us or with your dealer.

W&T

Introduction

The LAN-Modem permits devices that require dial-up modems for communicating to use the Intranet or Internet instead of the telephone system. On a serial interface, the LAN-Modem behaves in a way this is compatible with standard modems for the telephone system; the only difference is that the dial-up number is replaced by an IP address.

Modem

Intranet / Internet

“ATDT <Tel. No.>”

RS232

before:

LAN Modem

RS232

“RING”

now:

serial

device

serial

device

serial

device

RS232

Modem

RS232

“RING”

serial

device

serial

device

serial

device

“ATDT <IP. No.>”

RS232

W&T

Inhalt

1 Quickstart 7

1.1 Installation in flow chart form 8

1.2 Factory Default setting 9

2 Assigning the IP address 11

2.1 Configuring network parameters with WuTility 12

2.2 Serial assigning of IP, subnet mask and gateway 15

2.3 Assigning the IP using DHCP protocol 17

2.3.1 Activating/Deactivating DHCP 17

2.4 Assigning the IP using BOOTP protocol 20

3 Interfaces and displays 23

3.1 Ethernet connection 24

3.2 RS232 interface 26

3.3 Supply voltage 27

3.4 LED displays 28

4 LAN-Modem operation settings 29

4.1 Standard mode LAN-Modem <> LAN-Modem 30

4.2 Mode LAN-Modem <> Virtueller Modemport 31

5 Modem Operation 35

5.1 Serial transmission parameters 36

5.2 Command syntax 37

5.3 Command and data mode 38

5.4 All AT commands 39

5.4.1 A (ATA) 40

5.4.2 D (ATD[IP address]) 41

5.4.3 E (ATE[0|1]) 44

5.4.4 H (ATH) 45

5.4.5 In (ATI[0–8]) 46

5.4.6 O (ATO) 47

5.4.7 Q (ATQ0|1) 48

5.4.8 Sn? (ATS[0-40]?) 49

5.4.9 Sn=x (AT[0–40]=[0–255]) 50

5.4.10 Vn (ATV[0|1]) 52

5.4.11 Zn (ATZ[0|1]) 53

5.4.12 &C (AT&C[0|1]) 54

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Subject to error and alteration

5.4.13 &D (AT&C[0|1|2|3]) 55

5.4.14 &Fn (AT&F[0|1]) 56

5.4.15 &K (AT&K[0|3|4|5|6]) 57

5.4.16 &Sn (AT&S[0|1]) 58

5.4.17 &Vn (AT&V[0|1|2]) 59

5.4.18 &Wn(AT&W[0|1]) 60

5.4.19 &Yn (AT&Y[0|1]) 61

5.4.20 &Zn=x (AT&Z[0|1|2|3]=[IP address]) 62

5.4.21 %Bn (AT%B[2-8]) 63

5.4.22 %Dn (AT%D[7|8]) 64

5.4.23 %Pn (AT%P[0|1|2]) 65

5.4.24 %Sn (AT%S[1|2]) 66

5.4.25 %Nn (AT%N[0|1]) 67

5.4.26 ** (AT**) 68

Appendix 69

A1 Extended configuration of the LAN-Modem 70 A1.1 Starting the Telnet session 70 A1.2 Configuration of the TCP server port (Local Port) 71 A1.3 Configuration of the System Name 72 A1.4 Configuration of the System Password 72 A1.5 Configuration of Keep Alive Check 73 A1.6 Configuration of Link Speed 73 A2 Firmware update of the LAN-Modem 75 A3 Reading/Sending Configuration Profiles 82 A4 Software reset of the LAN-Modem 83 A5 The Modem Protocol on the TCP Level 84 A6 Used ports and network security 85 A7 Technical Data 88

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Subject to error and alteration

1 Quickstart

Already experienced users of LAN-Modems will find on the two following

pages a flow chart with the essential steps for start-up as well as the

configuration. Detailed information can be found then in the following

sections.

W&T Quickstart

1.1 Installation in flow chart form

Select site

Connect

supply voltage

LAN-Modem Windows PC

with TCP/IP

WuTility

installed?

yes

Connect

network cable

Finish

Network

Optain IP

address, subnet

mask, gateway

address

Install

WuTility with

product CD

Button:

IP address

Enter IP address,

subnet mask,

gateway

Start

WuTility

Select

LAN-Modem in

inventory list

W&T Quickstart

1.2 Factory Default setting

The list contains an overview of the most important settings. Detailed information on the respective parameters can be found in later sections of this manual.

Network settings

Hardware connection: Auto negotiating IP address: 0.0.0.0 Gateway address: 0.0.0.0 Subnet mask: 255.0.0.0 DHCP: Active TCP port for incoming calls: 8000

To prevent unintended address assignments or changes,

we recommend deactivating the DHCP, BOOTP and RARP protocols if they are not expressly used in the respective network environment.

Serial settings

Baud rate: 9600 Data bits: 8 Parity: NO Stop bits: 1 Handshake: Hardware (RTS/CTS)

W&T Quickstart

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Subject to error and alteration

2 Assigning the IP address

The LAN-Modem is factory set to IP address 0.0.0.0. Before you can make

the entry in the LAN-Modem, you need to specify an IP address that is valid

for your network. You system administrator will provide you with this. If

you have only a small network with no routing, use the IP address of your

PC and simply change the last digit. The IP address must be unique within

the network!

. Assigning IP address, subnet mask and gateway address

using WuTility management tool

. Assigning IP address, subnet mask and gateway address

through the serial port

. Assigning IP address, subnet mask and gateway using

DHCP/BOOTP protocol

. Using the ARP command

W&T Assigning the IP address

2.1 Configuring network parameters with WuTility

The Windows tool WuTility version 3.0 and higher allows not only inventorying of LAN-Modem, Com-Server and Web-IO installations, but also convenient assignment of the following network-side basic parameters:

• IP address

• Subnet mask, gateway address

• Activating/deactivating BOOTP/DHCP

Assigning requires that the PC and LAN-Modem be in the same subnet. In firmware revisions 1.45/1.14 and higher the function is independent of the current address settings in the LAN-Modem, i.e. even changes to parameters not matching the network are easily made. Any system password which has been set must however in this case be known.

Downloading and installing WuTility

The most current version can always be found at our Web site under the following address:

http://www.wut.de

From there use the menu tree on the left side to navigate:

Downloads r Serial Com-Servers

After unzipping the ZIP file, begin installation by doubleclicking on the file wutility_xxxus.msi. WuTility is started from

Start r Programs r W&T Software Toolkit r WuTility

Starting the assignment dialog

First be sure that both the LAN-Modem and the computer you are using are connected to the same network and are in the

W&T Assigning the IP address

Subject to error and alteration

same subnet. When started, WuTility automatically searches the local network for connected W&T network devices and creates an inventory list. This search process can be repeated manually as often as desired by clicking on the Scan button:

Within the inventory list you can identify the desired LAN-Modem based on its MAC address. For initial installations its IP address is 0.0.0.0.

Select the LAN-Modem and click on the IP address button:

To use the LAN-Modem with dynamic IP parameters, select in the following dialog box the corresponding option DHCP or BOOTP and then click on the Next button. Detailed information about these modes can be found in the section IP Assignment using DHCP protocol and IP Assignment using BOOTP protocol.

The Static option allows you to assign fixed basic parameters while simultaneously disabling DHCP and BOOTP protocols in the LAN-Modem. Enter the desired values for IP address, subnet mask and gateway address in the corresponding entry fields.

W&T Assigning the IP address

Clicking on the Next button assigns the network parameters to the LAN-Modem. After acknowledging the resulting message, all the columns in the WuTility device list are filled in with information.

This concludes the network-side startup of the LAN-Modem. With the exception of a few special settings, the rest of the configuration is done as for a standard dial-up modem using the serial port and AT commands.

Changing network parameters is protected by the

system password. To prevent improper access, we recommend assigning a system password for any LAN-Modems in use. Additional information can be found in the section Extended configuration of the LAN-Modem.

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Subject to error and alteration

2.2 Serial assigning of IP, subnet mask and gateway

After a LAN-Modem reset a time window of around 2 seconds is available, during which you can assign a new IP address, subnet mask and gateway address by entering at least 3 „x“.

This serial method functions regardless of whether the

LAN-Modem already has an IP address or not. The procedure can be repeated as often as desired. Therefore use this method if you don‘t know the IP address or have forgotten it.

First connect the serial port of the LAN-Modem to a computer. For a standard PC or laptop, you will need a 1:1 wired RS232 cable (=modem cable, see section RS232 interface).

The serial transmission parameters of the terminal program you use should be set to 9600 baud, no parity, 8 bits, 1 stop bit, no handshake. Reset the LAN-Modem by interrupting the power. When the green status LED lights up, enter the letter „x“ at least three times on the terminal, until the LAN-Modem returns the prompt IPno.+<Enter>.

Use the usual format (xxx.xxx.xxx.xxx) to enter the IP address, and end the entry by pressing <Enter>. If the entry was accepted, the acknowledgement is the assigned IP address. Otherwise you will get a FAIL message followed by the last current IP address.

2.2.1 Assigning of subnet mask and gateway address

Together with the IP address, the subnet mask and gateway address can also be assigned serially. The entry is separated by commas and follows the IP address. Entering as shown in

W&T Assigning the IP address

the following example will assign IP address 172.17.231.99, subnet mask 255.255.255.0 and gateway 172.17.231.52 to the LAN-Modem.

xxx -> LAN-Modem

IP no.+<ENTER>: <- LAN-Modem

172.17.231.99,255.255.255.0,172.17.231.52 -> LAN-Modem

172.17.231.99,255.255.255.0,172.17.231.52-1 <- LAN-Modem

2.2.2 Activating/Deactivating DHCP, BOOTP/RARP

The DHCP and BOOTP/RARP function of the LAN-Modem can be turned off as part of assigning the IP address serially. To activate/deactivate the DHCP or BOOTP/RARP client enter one of the following options directly appended (no space!) to the IP address and confirm with <Enter>.

• -0

DHCP and BOOTP/RARP = OFF

• -1

DHCP = OFF, BOOTP/RARP = ON

• -2

DHCP = ON BOOTP/RARP = OFF

Example: Deactivation of DHCP and BOOTP/RARP

xxx -> LAN-Modem

IP no.+<ENTER>: <- LAN-Modem

172.17.231.99-0 -> LAN-Modem

172.17.231.99 <- LAN-Modem

To prevent unintended address assignments or changes,

we recommend deactivating the DHCP and BOOTP/RARP protocols if they are not expressly used in the respective network environment. LAN-Modems with incorrectly assigned IP addresses can be easily found after the fact using the scan function of the WuTility management tool and reconfigured.

W&T Assigning the IP address

Subject to error and alteration

2.3 Assigning the IP using DHCP protocol

Many networks use DHCP (Dynamic Host Configuration Protocol) or its predecessor BOOTP described in the following

section for centralized and dynamic assignment of the network parameters. DHCP protocol is activated by the factory default settings, so that in network environments dynamic IP assignment is sufficient for connecting the LAN-Modem to the network. The following parameters can be assigned using DHCP:

• IP address

• Subnet mask

• Gateway address

• Lease time

To prevent unintended address assignments or changes,

2.3.1 Activating/Deactivating DHCP

The factory default setting is for DHCP protocol active. To deactivate it or to enable it again later, use one of the following options.

• Management-Tool WuTility

Select the desired LAN-Modem in the device list and click on the IP Address button. In the following dialog box enter the desired option DHCP, BOOTP or Static. Clicking on Continue then sends the new configuration data to the LANModem.

W&T Assigning the IP address

• Serial port

As part of serial IP assignment, the following options for deactivating/activating DHCP and BOOTP can be selected directly following the address string:

-0 r Deactivates DHCP and BOOTP/RARP

-1 r Activates BOOTP/RARP

-2 r Activates DHCP

A detailed description of the procedure can be found in the section on Serial assignment of IP, subnet mask and gateway.

2.3.2 System Name

To support any automatic updating of the DNS system by the DHCP server, the LAN-Modem identifies itself within the DHCP protocol with its system name. The factory default setting for this is LanModem- followed by the last three places of the Ethernet address. For example the factory set system name of a LAN-Modem with the Ethernet address 00:c0:3d:01:02:03 is LanModem_010203. The system name of the LAN-Modem can be changed in the configuration. For additional information refer to the section Extended configuration of the Lan-Modem.

2.3.3 Lease-Time

The lease time determined and transmitted by the DHCP server specifies the Time-To-Live of the assigned IP address. After half the lease time has expired, the LAN-Modem attempts to extend the time for the assigned DHCP server and up update the address. If this is not possible by the time the lease time expires, for example because the DHCP server can no longer be reached, the LAN-Modem deletes the IP address and starts a new cyclical search for alternate DHCP servers for the purpose of assigning a new IP address.

Because of the absent clock, the lease time associated with the current IP address is no longer available after a reset. After the

W&T Assigning the IP address

Subject to error and alteration

restart therefore a corresponding update request is issued with the original DHCP server. If the latter is not resolvable at this point in time, the LAN-Modem deletes the IP address and starts a new cyclical search for alternate DHCP servers.

If after the assigned lease time has expired the DHCP

server is not reachable, the LAN-Modem deletes its IP address. All existing network connections with other network clients are thereby closed. To prevent such events, we recommend configuring the assigned lease time in the DHCP server to infinite if possible.

2.3.4 Reserved IP addresses

A LAN-Modem provides services which other clients in the network can make use of as needed. To open a connection, they of course need the current IP address for the LAN-Modem, so that in such situations it makes sense to reserve a particular IP address for the LAN-Modem on the DHCP server. This is generally done by linking the IP address to the unique Ethernet address of the LAN-Modem, which can be found on the sticker attached to the housing.

58xxx [Model]

EN=00c03d004a05

OK xxxxxx

Ethernet address

2.3.5 Dynamic IP addresses

Operation with dynamic address assignment, whereby the LAN modem receives a different IP address after each restart of after the lease time has expired, is not recommended, since the AT dial-up command can be used only with numeric IP addresses.

W&T Assigning the IP address

2.4 Assigning the IP using BOOTP protocol

Many networks use BOOTP as predecessor of DHCP protocol for centralized and dynamic assignment of IP addresses. The factory default setting is for BOOTP turned off. You can activate it e.g. by using WuTility The following parameters can be assigned:

• IP address

• Subnet mask

• Gateway address

To prevent unintended address assignments or changes,

we recommend deactivating the DHCP and BOOTP/RARP protocols if they are not expressly used in the respective network environment. LAN-Modem with incorrectly assigned IP addresses can be easily found after the fact using the scan function of the WuTility management tool and reconfigured.

2.4.1 Address reservation

BOOTP protocol is based on fixed reservations of fixed IP addresses for particular Ethernet addresses. This means a LANModem connected to the network only gets an IP address if the latter was previously stored in the BOOTP server. Check with your system administrator for creating this reservation. The Ethernet address of the LAN-Modem can be found on the housing sticker.

58xxx [Model]

EN=00c03d004a05

OK xxxxxx

Ethernet address

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Subject to error and alteration

Once the administrator has made the necessary entries, the LAN-Modem obtains the desired IP address automatically after each reset. To ensure accessibility of the LAN-Modem even should the BOOTP server go down, the previous IP address is retained should there be no reply.

W&T Assigning the IP address

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Subject to error and alteration

3 Interfaces and displays

. Ethernet interface

. Serial interface

. Supply voltage

. LED displays

W&T Interfaces and Displays

3.1 Ethernet connection

The LAN-Modem incorporates an IEEE 802.3-compatible network interface.

Link-Status

The current link status of all models is indicated by the Error LED on the device front panel. Flashing at a rate of approx. 1 second indicates that there is no connection to the hub or that the connection is faulted.

3.1.1 10/100BaseT on RJ45

The LAN-Modem has a 10/100BaseT network interface on a shielded RJ45 connector. The pin assignments shown below correspond to an MDI interface, so that the connection to the hub or switch is made using a max. 100m long 1:1 shielded patch cable.

1 2 3 4 5 6 7 8

Direction

Out

Signal

Tx+

Tx-

Rx+

Rx-

The network connection is galvanically isolated with respect to the supply voltage as well as the serial interface(s) for at least 500V

rms

Auto Negotiation: 10/100BaseT, Full/Half Duplex

LAN-Modems are factory set to operate in Auto-Negotiation mode on the network side. The data transmission speed and duplex are automatically negotiated with the connected switch/ hub and set accordingly.

W&T Interfaces and Displays

Subject to error and alteration

In addition to the Auto-Negotiation mode, both the LAN-Modems as well as many switches can be configured for fixed transmission parameters with respect to speed and duplex. To prevent communications problems (duplex mismatch), only the following two combinations are permissible:

• Both parties (switch and LAN-Modem) are operated in Auto-

Negotiation mode.

• Both parties (switch and LAN-Modem) are configured for the

same (fixed) transmission speeds and duplex mode.

Information on toggling between Auto Negotiation and fixed transmission speeds can be found in the section Expanded LAN Modem Settings.

Managable switches often have special protocols

(spanning tree, port trunking, ...) as required for example for uplinks to other switches or broad-band connection of servers. These protocols are not generally required for connecting a normal terminal device such as the LAN-Modem, and they do under some circumstances significantly delay opening of communication after a new start. We recommend deactivating these protocols and functions on the port used for the LAN-Modem. Please consult here with the responsible network administrator.

W&T Interfaces and Displays

3.2 RS232 interface

The pin assignments for the RS232 port are identical with that of a dialup modem, which means that standard cable can be used. Make sure that the ports for the LAN-Modem and the serial terminal device are configured for identical transmission parameters and handshake procedures.

The following table shows the factory configured functions for the individual signals. These can be modified using the respective AT commands.

Factory setting

Active for existing connection

Data output

Data input

If deactive, break connection and do not accept new connection until active again

---

Always active

Hardware handshake input Data output only when active

Hardware handshake output active = ready to receive data deactive = not ready to receive data

For incoming connection alternately 1s active, 4s deactive until connection is established; then deactive

Direction

Output

Input

GND

Output

Input

Output

AT command

AT&Cn

---

AT&Dn

AT&Sn

AT&Kn

---

W&T Interfaces and Displays

Subject to error and alteration

3.3 Supply voltage

The supply voltage for the LAN-Modem can be brought in on the adjacent screw terminals on the underside of the housing. DC voltage of any polarity or AC voltage may be used. The reverse polarity protection results in the following various maximum and minimum values for the supply voltage:

• AC: 9Vrms (- 10%) - 30Vrms (+10%)

• DC: 12V (-10%) - 48V (+10%)

The current draw is indicated in the technical appendix.

+ 62 hidden pages

W&T 58620 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual