Altec ISDN Socket Modem AL5068S-3V - Manual (Page 18)

AL5068S Designer’s Guide
No. AL5068S-E00-105 Altec Electronic AG Seite 18 / 25
3.5 IOM-2 Bus Interface
The AL5068SI-3V ISDN Modem supports 2 independent analog channels by
adding 2 external PCM Codecs. This Codecs are connected to the IOM-2
bus on pins 44…47 of the socket modem.
It is possible to setup 2 simultaneous links for both incoming and outgoing
calls. The serial port remains in command state in this mode. The 2 external
Codecs are marked with Codec A and Codec B. Each Codec (A or B) can
have his own MSN. Each call can therefore be directed to a specific Codec.
There are 2 additional I/O signals to drive the B-Channel source of each
Codec. Please refer to the “AL5068S AT Commands Reference Manual”,
chapter 9 for a detailed description of all the AT commands regarding the
voice modes.
For a detailed schematic refer to Appendix A in this manual.