Net::telnet

Im trying to communicate with a MSM-UNIX. Version 4.4.0....C opyright
(C) 1984-1997. Micronetics Design Corporation.... server using the perl
module Net::Telnet

1 part of movign between screens is pressing F3 key. Im having
problems replicating this . This is the output of tcpdump -n -X -s0
while the machin waits for the key to be pressed

05:26:03.081503 IP 10.138.0.10.34725 > 194.61.247.239.23: . ack 4295
win 8576
0x0000: 4510 0028 63be 4000 4006 1241 0a8a 000a
E..(c.@.@..A....
0x0010: c23d f7ef 87a5 0017 d6ac c7ec 410f 86c0
..=..........A...
0x0020: 5010 2180 db6d 0000 P.!..m..

adn then after its pressed

05:26:30.736619 IP 10.138.0.10.34725 > 194.61.247.239.23: P 25:28(3)
ack 4295 win 8576
0x0000: 4510 002b 63c0 4000 4006 123c 0a8a 000a
E..+c.@.@..<....
0x0010: c23d f7ef 87a5 0017 d6ac c7ec 410f 86c0
..=..........A...
0x0020: 5018 2180 6e13 0000 1b4f 52 P.!.n....OR
05:26:30.764746 IP 10.138.0.10.34725 > 194.61.247.239.23: . ack 4535
win 8576
0x0000: 4510 0028 63c2 4000 4006 123d 0a8a 000a
E..(c.@.@..=....
0x0010: c23d f7ef 87a5 0017 d6ac c7ef 410f 87b0
..=..........A...
0x0020: 5010 2180 da7a 0000 P.!..z..
05:26:30.773827 IP 10.138.0.10.34725 > 194.61.247.239.23: . ack 4726
win 8576
0x0000: 4510 0028 63c4 4000 4006 123b 0a8a 000a
E..(c.@.@..;....
0x0010: c23d f7ef 87a5 0017 d6ac c7ef 410f 886f
..=..........A..o
0x0020: 5010 2180 d9bb 0000 P.!.....

so what do i use to mimic this with the perl module ?