I have a customer with a Telrad 2464, wanting to add a PC Based Voice Mail. Their main concern is ensuring the system can light their message waiting lamps. To complicate matters, the client does not have any supporting documentation for the system. Can anyone assist me with the code information to activate the MWL? Does the Telrad 2464 support in-band signaling? Unfortunately, I know nothing of the Telrad 2464 system. I appreciate any assistance.