Cisco PA-E3 Specifications download pdf (Page 18)

Compliance Information

PA-E3 Serial Port Adapter Installation and Configuration

2-6

• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or

connectors.

• Place a removed component board-side-up on an antistatic surface or in a static shielding

container. If you plan to return the component to the factory, immediately place it in a static

shielding container.

• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects

components from ESD voltages on the body; ESD voltages on clothing can still cause damage.

• Never attempt to remove the printed circuit board from the metal carrier.

Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should

be between 1 and 10 megohms (Mohm).

Compliance Information

The following sections provide compliance information that applies to the FCC and the PA-E3 serial

port adapter, which has been designed to meet these requirements. Modiﬁcations to this product that

are not authorized by Cisco Systems, Inc., could void the various approvals and negate your

authority to operate the product.

BABT Compliance

The BABT607116 marking on the PA-E3 signiﬁes that it meets United Kingdom directive 607116

and has been designed to BABT standards. The BABT label is located on the top of the PA-E3;

Figure 2-1 shows the BABT label for the PA-E3.

Figure 2-1 BABT Label for PA-E3 Serial Port Adapter

ITI-T Compliance

ITI-T recommendation G.823 speciﬁes that it is important to restrict jitter gain. Figure 4 of G.823

shows a typical jitter transfer characteristic. (Note that small jitter gain is allowed.) British Standard

6328: Section 8.1 1990 gives the allowable gain as 0.5 dB. The PA-E3’s line mode clocking complies

with these sections.

TBR24 Compliance

When the PA-E3 is in line clocking mode, jitter is not attenuated, and any jitter received is transferred

to the line. If input jitter exceeds the limits of TBR24, then output jitter will not meet TBR24 transfer

speciﬁcations. Line clocking mode is intended for use only where the connection involves a single

hop, and where clock timing will not be transferred to other network equipment.

When not in line clocking mode, the PA-E3 complies with TBR24 standards.

H10017

607116

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Cisco PA-E3 Specifications Page 18