Sure. Get an encoder, plug in a feed from a TV channel. Connect encoder to Milestone.
I am not sure how good the video will look or how well the audio will be in sync but it can be done.
I want to record 160 channel, some of them will be high defintion and if i will use encoder it can not be recodred more than 4 ceif resolution
Yes you can record. Jon's explanation is dead on. We have a customer that uses VMS to document commercials played at certain times. They use it for billing.
You can record anything to a VMS, you just need to feed the data in via a supported format/device.
160 channels of TV recording is going to probably require a couple of servers, assuming you are doing video AND audio.
For that market, you might want to talk to the guys at Blonder Tongue for some suggestions on building up a rack of encoders and related equipment.