Analog Transmission Comparison: AVT, ESSA (4)
| Contact manufacturer | Contact | Contact | Contact | Contact |
| Transmission type |
High-End
|
--
|
ISDN, PSTN
|
High-End
|
| Video Inputs |
6
|
--
|
8
|
6
|
| Alarm Inputs |
4 ~10
|
--
|
4 ~10
|
1 ~ 3
|
| TX/RX |
TX/RX
|
--
|
TX/RX
|
TX/RX
|
| Telemetry Control |
✔
|
--
|
✔
|
✔
|
| Video Outputs |
3
|
--
|
1
|
1
|
| Bit rate Bps |
Up to 1152 kbit/s
|
--
|
--
|
--
|
| Interface |
1 x X.21
|
--
|
--
|
--
|
| Digital |
✔
|
--
|
--
|
✔
|
| Accessories |
--
|
Cheeta monitoring centre
|
--
|
--
|
| Pre & Post Alarm Image Buffer |
--
|
--
|
✔
|
✔
|
| Built-in Modem |
--
|
--
|
--
|
✔
|
| Functions |
--
|
--
|
--
|
3
|
| Switching Type |
--
|
--
|
--
|
Sequential
|
| Signal Mode |
--
|
--
|
--
|
PAL
|
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