My guess, like others have said... An unvented expansion pod on the PCP for additional tie cables which link the PCP to the fibre cabinet. A vented expansion pod on the fibre cabinet to add additional ports. How many ports will depend on what size Huawei cabinet it is.
edit: if it's a "pod" on the fibre cabinet it will be a small Huawei.
Edited by j0hn83 (Sun 02-Apr-17 02:47:42)