Cisco AS5300 - Universal Access Server User Manual download pdf (Page 5)

The Quad E1/PRI WAN card (see ) without serial interfaces includes four RJ-45 ports for

terminating 120-ohm balanced lines or 75-ohm unbalanced lines. Cables are not included with

the card. However, cable specifications and port pinouts are listed in the appendix "." Note that

these boards support both MICA and Microcom modems.

A 10-position rotary switch allows the user to choose the number of ports that are terminated as

75-ohm unbalanced lines. If the LED labeled 120 at each port is on, it indicates the input

impedance of that port is set to 120 ohms. If it is off, the impedance is set to 75 ohms.

Jumper settings on the card can be used to configure the 75-ohm unbalanced ports so the receive

shield is connected to ground. Impedance selection switch settings and receive shield jumper

positions are described in the next chapter, "Preparing to Install."

Figure 1-4 Quad E1/PRI Card Without Serial Interfaces

Cables are not included with the card. However, cable specifications and port pinouts are listed

in the appendix, "."

Quad Cards With Serial Interfaces

This section describes the Quad T1/PRI and Quad E1/PRI cards () with serial interfaces. Note

that these cards do not support Microcom modems.

Note If you are installing a Quad card with serial interfaces on a Cisco AS5300 chassis you

already have, you will need to upgrade the DRAM to 64 MB. You can order the memory

upgrade (part number 15-1509-01).

Figure 1-5 Quad T1/PRI or E1/PRI Card With Serial Interfaces

The board provides 4 RJ-45 T1 or E1 PRI ports and 4 serial interfaces for backhaul WAN

support.

The T1/PRI ports are configured as 100-ohm per port. For the Quad E1/PRI WAN card, the four

ports can be configured as 75- or 120-ohm lines. The factory-set default is 120-ohm. Note that

for the E1/PRI card you change the impedence using a software command. See the chapter

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Cisco AS5300 - Universal Access Server User Manual Page 5