There are two telephones in Xiao Zhong's home. The numbers are all seven digits, the first three digits are the same, the middle digit is not, and the last three digits are three.

If it is a positive ordinal number, the three numbers are y+ 1, y, y- 1,

Available equations:

3x+y+ 1+y+y- 1 = 10y+y- 1

3x+3y= 1 1y- 1

3x=8y- 1。

Since x and y are numbers between 1 ~ 9,

When x=5 and y=2, the equation holds.

That is, this number is 555032 1.

If the ordinal number is reversed, the last three numbers are y- 1, y, y+ 1.

Available equations:

3x+y- 1+y+y+ 1 = 10y+y+ 1。

3x+3y= 1 1y+ 1，

3x=8y+ 1。

It is verified that the equation holds when x=3 and y= 1.

So this number is 33300 12.

To sum up, the telephone number of Jia Xiaozhong is: 555032 1, 33300 12.

So the answer is: 555032 1, 33300 12.