Ray,
A reply from our talented Tech Dept:
For wired cameras, anything that extends a
standard (6 wire) telephone cord should
work. E.G. a "6 wire in-line coupler" that
lets you join two phone cords together. You
can use the coupler to connect a 6 wire
telephone cord to the camera cord.
6 wire in-line coupler (cat. no. 279-423):
http://www.radioshack.com/product.asp? catalog%5Fname=CTLG&category%5Fname=CTLG%
5F001%5F001%5F013%5F006&product%5Fid=279%
2D423
6 wire telephone cord (cat. no. 279-422)
http://www.radioshack.com/product.asp? catalog%5Fname=CTLG&category%5Fname=CTLG%
5F001%5F001%5F012%5F000&product%5Fid=279%
2D422
Or you could use a 6 wire cord with an RJ11
PLUG on one end and an RJ11 SOCKET on the
other end, such at cat. no. 279-363
http://www.radioshack.com/product.asp? catalog%5Fname=CTLG&category%5Fname=CTLG%
5F001%5F001%5F012%5F000&product%5Fid=279%
2D363