V.61

ITU V.61 is a standard for Analog Simultaneous Voice and Data (ASVD), a MODEM related standard for use over a POTS line or leased line.

The [http://www.itu.int/rec/T-REC-V.61-199608-I/en V.61 Standard] can be downloaded free of charge in several languages.

ee Also

*V.70 Digital Simultaneous Voice and Data
*ITU-T V-Series Recommendations

References

* [http://www.usb.org/developers/devclass_docs/usbcdc11.pdf USB Communications Device Class Specification]