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C H A P T E R

Overview of the Cisco 2524

and Cisco 2525 Routers

The Cisco 2524 and Cisco 2525 routers provide LAN and WAN access in a low-cost

modular router platform that can grow with your internetworking needs. The Cisco 2524

offers an Ethernet (attachment unit interface [AUI] or 10BaseT) LAN connection, and the

Cisco 2525 offers a Token Ring (shielded twisted-pair [STP] or unshielded twisted-pair

[UTP]) LAN connection. Both routers can accommodate up to three WAN modules—two

synchronous serial and one Integrated Services Digital Network (ISDN).

The choice of synchronous serial WAN modules is as follows:

•

Note

of signaling it supports: EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530. You can

order from Cisco Systems a DB-60 shielded serial transition cable. The router end of the

shielded serial transition cable has a DB-60 connector; the other end of the cable has the

appropriate connector for the standard interface you specify.

The choice of ISDN WAN modules is as follows:

•

2-wire switched 56-kbps data service unit/channel service unit (DSU/CSU)

4-wire 56/64-kbps DSU/CSU

Fractional T1/T1 DSU/CSU

Five-in-one synchronous serial

The five-in-one synchronous serial WAN module gets its name from the five types

ISDN Basic Rate Interface (BRI)

ISDN with integrated network termination 1 (NT1) device

Overview of the Cisco 2524 and Cisco 2525 Routers 1-1