NonStop S-Series Planning and Configuration Guide (G06.29+)

Specifications

HP NonStop S-Series Planning and Configuration Guide—523303-021

B-6

Fiber-Optic Cables

The minimum bend radius for SMF and MMF fiber-optic cables is:

•

Unsheathed: 1.7 inch (4.3 cm)

•

Sheathed (ruggedized): 4.2 inch (10.7 cm)

You can use fiber-optic cables available from HP or you can provide your own fiber-

optic cables.

If you provide your own fiber-optic cables, the attenuation specification is:

•

3.5 db/km of length

•

0.5 db/connector insertion

•

10.5 db maximum allowable loss for any link

You or your installer should verify that the link does not exceed the maximum allowable

loss by using a calibrated optical power source to measure the optical power at the

distant end of the cable and calculating the attenuation.

Any loss of 10.5 db or less is acceptable. Any attenuation above 10.5 db might appear

to work, but the bit error rate will be unacceptable and you must repair or replace the

cable.

Modified System Enclosures

A modified system enclosure has two pins cut and removed from the backplane

connector in slot 55, correcting a design defect when the enclosure is populated with

IOMF CRUs. A modified enclosure is identified by a revision label on the cable-

management post.

A modified enclosure cannot be used with S7000, S7400, S70000, or S72000 PMF

CRUs but can be used with S7600 or later and S74000 or later PMF CRUs, IOMF

CRUs, or IOMF 2 CRUs.