Re: Bosch CCTV distance dilemna

[Silicon Sam <siliconsam@xxxxxxxxx>]

On Nov 26, 5:54=A0pm, Matt Ion <soundy...@xxxxxxxxx> wrote:
> I assume you're using passive video baluns to run the video over the
> Cat3? =A01500ft. is a bit long for passive, you may need to go to active
> baluns to get clear video. =A01500 shouldn't be too bad for serial
> control, as long as you're terminated properly... are they running
> RS-242/422, or RS-485?
>
> Try popping over towww.cctvforum.comwith your question, there are a
> lot more people there who are experienced in this area.
>
> On 26/11/2009 1:08 PM, Silicon Sam wrote:
>
>
>
> > =A0 =A0I have a local client that has a campus with 8 buildings. =A0Bui=
ldings
> > 1 through 7 have all their CCTV piped over to building 1 via twisted
> > pair, and the Bosch Bi-Phase over 18ga shielded twisted pair. =A0All is
> > good with 6 of the buildings. (building 8 has a completely different
> > CCTV system)
>
> > =A0 =A0Building 7 however has a single 25 pair Cat3 cable running 4 twi=
sted
> > pairs for cameras, TR560 and TT560 used for video, and a couple of
> > pairs for Bosch Bi-Phase control. =A0Video is weak and crappy, and
> > control is non-existant. =A0I measure about 400mv AC at the headend for
> > control, like 4mv while joystick is moving at the building 7.
> > Obviously this is not the right cable. =A0It was installed maybe 3-5
> > years ago, no one at the site has seen it work, so we don't know if it
> > ever did. =A0Cable run is approx 1500 feet.
>
> > =A0 =A0I have several options, I think, and wanted to see if anyone has=
 any
> > others.
>
> > Try to triple, quad, or more up the 24 gauge wires on the control,
> > since we have so many spares. =A0Hadn't tried that yet, but video sucks
> > anyways.
>
> > Go with a fiber link between the buildings. =A0The LTC 4628 and 4629 ar=
e
> > quite pricy however.
>
> > Go with some sort of Ethernet converter for this 1 building. Keep in
> > mind 4 cameras, 2 are PTZ Autodomes.
>
> > Add a small Bosch DVR at building 7, and monitor it at building 1
>
> > I had thought of running the video and control over to building 8, but
> > it has AD cameras and a March DVR, and I don't think the DVR over in 8
> > can handle the AD and Bosch Autodomes using 2 different protocols for
> > control.

  Will do.  The TT560 and TR560 are active.  Video looks OK for the
fixed cameras, the PTZ are hard to tell since they won't move.  The
picture in building 1 is B&W, but at the TP adapters they are nice
color pictures.  The Bosch Autodomes are Bi-Phase, a type of RS422.

  My concern was the 24 gauge Cat 2 or 3 TP, when the Bosch calls for
18Ga Shielded for the comm.  A lot of the other cameras in other
buildings do use the correct cable, and they work fine.