In one of my setups, I have about 200m length of Cat5e from the phone directly to a cisco 3560. The phone is having intermittent issues. Sometimes the quality of the call is bad, and the call usually gets dropped a few times.
I'm being told that even though 100m is the max length of Cat5e, that 200m is fine?
Would you do this? What can I do to improve call quality?
The standard 100m ethernet rules (90m drop + 10m patch/cross connect) still apply here and this 200m length is almost surely causing these issues. If you try to test a 200m cable run with a "Fluke" type test meter you will see many problems. This length can only run an Analog/FXS circuit :(
Check out Page 29;
The maximum lengths of horizontal distribution cables are shown in the
Table 4.1: Cable lengths
Horizontal Cables . . . ***Must Be No More Than . . .
From the horizontal 90 m (295 ft.) long.
cross-connect to the
Used for patch cords and 6 m (20 ft.) long
cross-connect jumpers in
the horizontal cross-connect
These limits apply to all types of horizontal cable.
System designers should plan for a combined cable
length of 10 m (33 ft.) for patch cords and for equipment connections in the
work area and telecommunications closet. This length is in addition to the
90 m (295 ft.) of cable allowed between the horizontal cross-connect and the
If the cables fall outside this standard and fail the testing you won't be good to go.
Hope this helps!