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Setting Up ISDN Link To An ISP Using NAT
This document is for OfficeConnect Remote 510, 520 & 530 and requires software v5.04f or greater to connect to an Internet service provider
(ISP) via a PPP connection that will support Multilink PPP*, NAT & Dynamic Allocation of an IP address**. * Multilink PPP (MLPPP): will allow 2 channels (128k) access to an Internet service provider or other vendor's router that supports MLPPP. You may need to sign up for this service ahead of time, so check with your provider if this is necessary. You can bring up both channels all the time during a MLPPP connection or set a percentage threshold to bring up the second channel based on demand. ** NAT & Dynamic Allocation of IP Address from an Internet Service Provider: With the NAT feature enabled, you can use your own private set of IP addresses that will be translated to the single IP address which gets assigned to your OfficeConnect during connection negotiation (dynamically assigned addressing from the ISP). The CO NAT screen is used to set up the NAT masqueraded range of IP addresses. It is possible to use a single valid IP address as the NAT address, but this tech tip is based on getting the IP address dynamically assigned by the ISP during each connection negotiation. NOTE: Accessing an Internet network address that is within your masqueraded range is not possible, as the address will be translated, so it is wise where possible to choose a private network range of address that is not a popular Internet site. Once connected to the Internet, web browsing and FTP should work from correctly setup PC's. PING, TELNET and some other services with require imbedded IP addresses are not available with NAT at this time. You may need to upgrade the unit if you are not on v5.04f5 already: Download the latest software available on the 3Com.com Web site under: Support, ISDN, Software library, Bridge and Router files: OCR0504f5.EXE this is for OfficeConnect Remotes 510, 520 or 530. Copy file to a temp directory, EXIT WINDOWS, explode the file by typing the filename and follow the text file for upgrade instructions. This document is based on the command prompt setup, since NAT & MLPPP are not configurable from Trancend Quick Configuration Manager (TQCM). You can either click on the VT100 icon in TQCM or use any terminal mode (set to 9600, N, 8, 1) to access the unit via a direct serial cable connection or telnet. The default password is "PASSWORD" to the command prompt configuration software which is built in to the units. The following is an example; you will need to substitute your correct network, Internet provider and ISDN information: 1) QC = Quick Configuration; NAme = to set up Name of unit, IP address, IP mask and ISDN line configuration. After you fill this out, the values will reside in the various system configuration options (i.e., ISDN line configuration will show in CO PO ISDN). In this example uses a Class C network address with a masqueraded network of 192.168.100.0. The IP address 192.168.100.254 is used for the OfficeConnect Lan port address. Each PC should be setup for unique addresses within this private network and use the OfficeConnect's Lan port address as their PC's gateway address.
V05.04 ACMECO UNIT PARAMETERS ISDN Ok
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Unit Name : ACMECO
Unit LAN IP address : 192.168.100.254
Unit LAN IP mask : 255.255.255.0
Network Type : USA (National ISDN-1)
For North American use only
SPID 1 : 0198212230
Directory Number 1 :9821223
SPID 2 : 0198212240
Directory Number 2 :9821224
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^W - Help ^G - Main menu
^E - Submit ^L - Prev menu
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Unit Name = unique name of this unit (12 character free text, no characters but underscore is OK )Unit LAN IP address = the IP address of this unit's LAN port (from the masqueraded network) Unit LAN IP mask = the subnet mask for this masqueraded network Network Type = telephone switch type equipment of your ISDN line SPIDs = These are provided by your telephone company for your ISDN line (for North America only) Directory Numbers = 7 digits only; do not include area code (for North America only) ^E to submit, SAVE & reboot to initialize the ISDN line- after reboot, upper right hand corner of screen should show ISDN OK CHECK that you can dial yourself, do a LOOPBACK test from CO PO from command prompt: call the second phone number of this unit - Example: CALL 9821224 (return) If it works, the ISDN1 & ISDN2 ports NAME field will be "LOOPBACK!" and STAT will be "UP" If this does not work, cancel the call (CANC 9821224 ) and try a 1 and your own area code or 9 (if centrex) in front of the phone number. This will verify that both B channels are working and able to dial out and receive local calls. Also, you can check the ISDN line status under CO PO IS - both SPIDS should show a status to the effect of "assigned OK" if status is something like waiting for net or initializing the ISDN is not ready to make calls. 2) QC = Quick Configuration; INternet = Connect to the Internet (ISP) or another PPP router After you fill this out, the values will reside in their various system configuration options and it does not keep them in the QC Internet setup screen. So to change settings or correct data you can go to the specific configuration locations (i.e., CO IS NU for ISDN phone #) and change them.
V05.04 ACMECO CONNECT TO ANOTHER PPP IP ROUTER ISDN OK
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Name of your Internet Provider or remote site : Netservice
ISDN number of the remote unit you want to call : 14085551212
Call Type : 64K Unrestricted
IP Address of this unit's LAN port : 192.168.100.254
IP Mask of this unit's LAN port : 255.255.255.0
IP Address of this end of the ISDN link : UNNUMBERED
IP Address of the remote end of the ISDN link : UNNUMBERED
IP Mask of the ISDN link : UNNUMBERED
IP Address of the remote hosts network : INTERNET
IP Mask of the remote hosts network : INTERNET
Manufacturer of remote router : DEFAULT
ID to log into remote site : demo
ID for others to log into you : UNUSED
PAP Password to log into remote site : demopw
PAP Password for others to log into you : UNUSED
CHAP Password to log into remote site : UNUSED
CHAP Password for others to log into you : UNUSED
Name = ISP's name or remote site = Netservice (this is an example)ISDN # = ISP's ISDN phone # to be dial to connect to their router (add 9 if necessary) Call type 64k or 56k = this depends on your area ISDN line capabilities IP address of this unit's LAN port = this unit's IP address from the QC Name setup screen. IP mask = the mask for this IP address is taken from the QC Name setup screen. Take the default settings for most of the options per the above example. Manufacturer of remote router = scroll to the correct Manufacturer of remote router if possible. ID to log into remote site = the login name assigned to you by your ISP ID for others to log into you = unused (only used when two way authentication is necessary) PAP password to log into remote site = the password assigned to you by your ISP PAP password for others to log into you = unused (only used when two verification is necessary) CHAP password to log into remote site = unused (most ISPs do not use this) CHAP password for others to log into you = unused (only used when two verification is necessary ^E, SAVE NOTE: If you go back into the QC INT again it will build a second set of databases with the same data as if you wanted multiple sites and this could cause some conflicts. To make changes to the above setup, it may be best to start the setup over by typing CO STD.
3) Setup NAT under CO NAT:
V05.04 OCR EDIT NAT PARAMETERS ISDN Ok
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Network Address Translation: ENABLED
NAT IP Address : INTERFACE
NAT Masqueraded Network : 192.168.100.0
NAT Masqueraded Mask : 255.255.255.0
SESSION TIMEOUTS (seconds)
TCP FIN : 2
TCP inactive : 9000
UDP sessions : 300
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^G - Main menu
^E - Submit ^L - Prev menu
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Note that the word "INTERFACE" in upper case is inserted for the NAT IP Address. This is the setting that allows the ISP to provide the actual IP address which the OCR then uses for the ISDN link address. Use the defaults for Session Timeouts or adjust if required. ^E to submit and SAVE 4) ENABLE for Multilink PPP : a: Go to CO IS NU, highlight the entry for this connection, (in this example it would be "NETSERVICE"), type EDIT (return). Then enable Multilink PPP and verify PPP Authentication under the PPP parameter section. The following is an example:
V05.03f ACMECO EDIT ISDN NUMBER 5ESS ISDN OK
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Name : Netservice
ISDN Number1 : 14085551212 Call Type1 : 64K Unrestricted
Number2 : Type2 : 64K Unrestricted
Number3 : Type3 : 64K Unrestricted
Number4 : Type4 : 64K Unrestricted
Max Circuits :2 PPP PARAMETERS :
IP Address :0.0.0.0 PPP : ENABLED
IP Mask :0.0.0.0 Remote IP Address : 0.0.0.0
IP Hop Count :1 Remote Unit Type : DEFAULT
IPX Network :FFFFFFFE PPP Phys : SYNC
IPX Frame Type :802.2 PPP Authentication : PAP
PPP MP : ENABLED
Learnt Endpoint Disc : NULL
b: Go to CO PO, highlight ISDN1, at command prompt type EDIT (return) , type PORT (return):
V050.3f ACMECO Edit ISDN Port 5ESS ISDN OK
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Port Number :ISDN1 Demand : ENABLED
Port Name :AUTO FAST/PPP 1 Demand Threshold : >0
Compression :LZ-STANDARD Demand Period : 0
Scramble :DISABLED Demand Priority : 0
Line Speed :64000 Idle Threshold : >0
Dial Timeout :10 Idle Period : 0
Set DEMAND=ENABLED on both ports and set the thresholds, period and priorities per your specifications. The above example is for a 2 channel access during the entire connection. Repeat for ISDN2 - both ports should be identical Command Prompt: ^E to submit, type SAVE (return) 5) Bring up the link to an Internet Service provider with a Web Browser request. The first channel should come up within few seconds (up to a minute) the second channel should come up after a successful login, unless there is are threshold settings. rev 6/26/97 
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