BAS2800+ - MultiTech MT5656 serial modem codes.

Issue

MultiTech MT5656 serial modem codes.

Product Line

Other

Environment

BAS2800+

MultiTech

Modem

Control codes

5656

Cause

The MultiTech MT5600 is no longer available and is replace by the MT5656.

Resolution

The Multitech MT5600 modem has been made obsolete and has been replaced by the MT5656. We have experienced communication problems when mixing these two models of modem.

It has been found that the most consistent and reliable AT codes for the Multitech MT5656 modem when communicating with an MT5600 modem connected at the BAS 2800+ front end are:-

AT&F0

ATS0=1

ATE1

AT\N5

AT%C0

AT+MS=V34,1,300,9600,300,9600

AT&K0

ATQ0

AT%E2

ATX4

AT&D3

ATM0

AT&W0

AT&W1

Note:

If any of the remote sites are using an MT5600 modem then the BAS 2800+ front end modem should always be an MT5600. If a replacement modem is required at the front end then it is recommended that one of the remote sites MT5600 modem is replaced with an MT5656 modem. This will release the MT5600 modem for front end duty.

If the whole installation consists of MT5656 modems only, there are no known communications issues.

When manually connecting from either front end or remote site a connection was established successfully every time.