Asynchronous Point of Sale-to-IP Conversion

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Updated:September 9, 2007

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Asynchronous Point of Sale-to-IP Conversion

Table Of Contents

Asynchronous Point of Sale-to-IP Conversion

Contents

Prerequisites for Asynchronous Point of Sale-to-IP Conversion

Information About Asynchronous Point of Sale-to-IP Conversion

Asynchronous Point of Sale-to-IP Conversion

How to Configure Asynchronous Point of Sale-to-IP Conversion

Configuring BSTUN

Configuring APOS on the Serial Interface

Configuring the Line Interface

Configuration Examples for Asynchronous Point of Sale-to-IP Conversion

APOS Configuration: Example

Additional References

Related Documents

MIBs

Technical Assistance

Command Reference


Asynchronous Point of Sale-to-IP Conversion

The Asynchronous Point of Sale-to-IP Conversion feature modifies the Cisco IOS implementation of block serial tunnel (BSTUN) to support asynchronous point of sale (APOS) to IP conversion of credit and debit card authorization traffic to a LAN-attached host.

Feature History for the Asynchronous Point of Sale-to-IP Conversion Feature

Release
Modification

12.3(2)T

This feature was introduced.


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Contents

•Information About Asynchronous Point of Sale-to-IP Conversion

•How to Configure Asynchronous Point of Sale-to-IP Conversion

•Configuration Examples for Asynchronous Point of Sale-to-IP Conversion

•Additional References

•Command Reference

Prerequisites for Asynchronous Point of Sale-to-IP Conversion

The router always functions as a data circuit-terminating equipment (DCE) device when controlling the connection, regardless of the cabling; therefore, a DCE cable or Data Terminal Equipment (DTE) cable with an external null modem connector is required.

Information About Asynchronous Point of Sale-to-IP Conversion

To configure the Asynchronous Point of Sale-to-IP Conversion feature, you must understand the following concept:

•Asynchronous Point of Sale-to-IP Conversion

Asynchronous Point of Sale-to-IP Conversion

The APOS protocol utilizes asynchronous communications. The APOS connection to the terminal will always be over an asynchronous leased line. The serial interface controlling the POS device is mapped to the host device by the bstun route (APIP) command. APOS to IP conversion (APIP) supports only active (outbound) activation sequences to the host device specified by the bstun route (APIP) command.

Although the connection between the terminal and the router is a leased line, the terminal believes it is still connected to a modem. The terminal sends Hayes AT messages to the router. In this situation, the peer connection follows the state of the asynchronous dial connection. The tunnel is non-persistent and will only be active during the transaction. For terminals that do not send Hayes AT messages on the leased line, the router can be configured for direct mode. In this situation, the peer connection still follows the state of the asynchronous connection. Because the connection is permanent, the tunnel will be persistent.

Because there is only one POS terminal for each asynchronous line, addressing and polling need not be performed. A basic APOS call flow is conducted as follows:

1. The terminal sends a Hayes AT initialization string.

2. The router acknowledges with a numeric okay.

3. The terminal sends a dial string to the router.

4. The router processes the dial string and activates the peer connection.

5. If the peer successfully connects, the router sends a connect message for the appropriate line speed. If the peer does not connect, a "no carrier" or "no dial tone" message is sent.

6. If the peer connects, the router then sends an ENQ(0x05) message requesting data from the terminal.

7. The terminal starts the communication session by sending a data request.

8. The host responds to the terminals data request.

9. When the terminal has finished sending data, it sends an ACK(0x06) message to the router.

10. The router ends the session with an EOT(0x04) message.

In direct mode, Hayes AT messages are not sent. The router continuously sends ENQ(0x05) messages requesting any data from the terminal.

How to Configure Asynchronous Point of Sale-to-IP Conversion

The following tasks must be completed to configure APOS:

•Configuring BSTUN (Required)

•Configuring APOS on the Serial Interface (Required)

•Configuring the Line Interface (Required)

Configuring BSTUN

In this task, you configure basic BSTUN.

SUMMARY STEPS

1. enable

2. configure

3. bstun peer-name ip-address

4. bstun protocol-group group-number apos

5. bstun remote-peer-keepalive seconds

6. bstun keepalive-count count

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enters privileged EXEC mode. Enter your password if prompted.

Step 2 

configure {terminal | memory | network}

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

bstun peer-name ip-address

Example:

Router(config)# bstun peer-name 10.100.10.1

Enables BSTUN.

Step 4 

bstun protocol-group group-number protocol

Example:

Router(config)# protocol-group 1 apos

Defines a BSTUN group that will use the APOS protocol.

Step 5 

bstun remote-peer-keepalive seconds

Example:

Router(config)# bstun remote-peer-keepalive 100

Enables detection of the loss of a peer.

•This command should only be enabled if the host has the parameter enabled. Because connections in dial mode are not persistent, it is not necessary to run keepalives on the tunnel. The host timer will detect if the connection to the host is lost.

Step 6 

bstun keepalive-count count

Example:

Router(config)# bstun keepalive-count 5

Defines the number of times to attempt a peer connection before declaring the peer connection to be down.

Configuring APOS on the Serial Interface

In this task, you configure BSTUN and APOS on the serial interface.

SUMMARY STEPS

1. interface serial number

2. physical-layer async

3. no ip address

4. encapsulation bstun

5. bstun group number

6. bstun route all apip ip-address [fport port] [tcp-queue-max size] [header {vo | v1 | v2}]

7. asp role primary {primary | secondary}

8. asp dcd always

9. asp direct

10. asp enq {disable | delay milliseconds}

11. asp retries number

12. asp send ack

13. asp timer {rsp rsp-time | rx rx-time | host host-time | connect connect-time}

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enters privileged EXEC mode. Enter your password if prompted.

Step 2 

configure {terminal | memory | network}

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

interface serial number

Example:

Router(config)# interface serial 1

Enters interface configuration mode.

Step 4 

physical-layer async

Example:

Router(config-if)# physical-layer async

Specifies the mode of a slow-speed serial interface on a router as asynchronous.

Step 5 

no ip address

Example:

Router(config-if)# no ip address

Specifies that the interface will not use an IP address.

Step 6 

encapsulation bstun

Example:

Router(config-if)# encapsulation bstun

Enables BSTUN encapsulation.

Step 7 

bstun-group number

Example:

Router(config-if)# bstun-group 1

Specifies the BSTUN group to which the interface belongs.

Step 8 

bstun route all apip ip-address [fport port] [tcp-queue-max size] [header {vo | v1 | v2}]

Example:

Router(config-if)# bstun route all apip 10.9.8.7

Defines how APIP frames will be forwarded from a BSTUN interface to a remote BSTUN peer.

Step 9 

asp role {primary | secondary}

Example:

Router(config-if)# asp role primary

Specifies whether the router is acting as the primary end of the polled asynchronous link or as the secondary end of the polled asynchronous link connected to the serial interface. This command starts the serial interface.

Step 10 

asp dcd always

Example:

Router(config)# asp direct always

(Optional) Specifies that both data set ready (DSR) and data carrier detect (DCD) are to be asserted when traffic starts to the serial interface.

Step 11 

asp direct

Example:

Router(config)# asp direct

(Optional) Disables dial mode and automatically activate the peer connection.

Step 12 

asp enq {disable | delay milliseconds}

Example:

Router(config)# asp enq disable

(Optional) Configures how the router sends ENQ(0x05) messages to the terminal.

Step 13 

asp retries number

Example:

Router(config)# asp retries

(Optional) Specifies the number of times a packet will be resent before the connection with the terminal is disconnected.

Step 14 

asp send ack

Example:

Router(config)# asp send ack

(Optional) Enables the sending of ACK(0x06) messages to the terminal to acknowledge terminal requests.

Step 15 

asp timer {rsp rsp-time | rx rx-time | host host-time | connect connect-time}

Example:

Router(config)# asp timer rsp 29

Router(config)# asp timer rx-time 30

Router(config)# asp timer host 120

Router(config)# asp timer connect-time 30

(Optional) Customizes the ASP timers.

Configuring the Line Interface

In this task, you configure the line interface to support APOS. The settings configured must match those configured on the POS device.

SUMMARY STEPS

1. enable

2. configure

3. line number

4. databits {5 | 6 | 7 | 8}

5. parity {none | even | odd | space | mark}

6. stopbits {1 | 1.5 | 2}

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enters privileged EXEC mode. Enter your password if prompted.

Step 2 

configure {terminal | memory | network}

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

line number

Example:

Router(config)# line 1

Enters line configuration mode.

Step 4 

databits {5 | 6 | 7 | 8}

Example:

Router(config-line)# databits 7

Sets the number of data bits per character that are interpreted and generated by the router hardware.

Step 5 

parity {none | even | odd | space | mark}

Example:

Router(config)# parity even

Defines generation of a parity bit.

Step 6 

stopbits {1 | 1.5 | 2}

Example:

Router(config-line)# stopbits 1

Sets the number of the stop bits sent per byte.

Configuration Examples for Asynchronous Point of Sale-to-IP Conversion

This sections provide the following configuration example:

•APOS Configuration: Example

APOS Configuration: Example

The following example shows a complete APOS configuration: 

bstun peer-name 10.122.2.10 

bstun protocol-group 20 apos 

bstun remote-peer-keepalive 100

bstun keepalive-count 5

!

interface serial 1

 physical-layer async 

 no ip address 

 encapsulation bstun 

 bstun group 20

 bstun route all apip 10.122.2.1 

 asp role primary

 asp dcd always

!

line 1

 databits 7 

 parity even 

 stopbits 1

Additional References

The following section provides references related to APIP.

Related Documents

Related Topic
Document Title

IBM Networking

Cisco IOS Bridging and IBM Networking Configuration Guide, Release 12.3

IBM Networking

Cisco IOS Bridging and IBM Networking Command Reference, Volume 2 of 2: IBM Networking, Release 12.3


MIBs

MIBs
MIBs Link

•CISCO-BSTUN-MIB

•CISCO-ASPP-MIB

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


Technical Assistance

Description
Link

Technical Assistance Center (TAC) home page, containing 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/public/support/tac/home.shtml


Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS Bridging Command Reference at http://www.cisco.com/en/US/docs/ios/bridging/command/reference/br_book.html or the Cisco IOS IBM Networking Command Reference at http://www.cisco.com/en/US/docs/ios/ibm/command/reference/ibm_book.html. For information about all Cisco IOS commands, go to the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or to the Cisco IOS Master Commands List.

•asp dcd always

•asp direct

•asp enq

•asp retries

•asp send ack

•asp timer

•bstun route all apip

•debug aspp event

•debug aspp packet

•bstun protocol-group

•show bstun

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