Cisco Port Adapter 8p ISDN BRI PA-8B-S/T= Hoja De Datos

• BRI port adapter ordering information

– Eight-port BRI port adapter, S/T interface: PA-8B-S/T

– Four-port BRI port adapter, U interface: PA-4B-U

• Network interfaces

– Supports ISDN, PPP, X.25, HDLC, Frame Relay, and

LAPB functionality

• Electrical interfaces

– 2B+D channels per physical port

– Support for either 56 Kbps or 64 Kbps

(software configurable)

– Integrated NT1 on U-interface port adapter (PA-4B-U)

• Physical Interface Connectors

– 4 (U-interface) or 8 (S/T interface) RJ45 connectors per

port-adapter

– Up to 48 BRI ports per Cisco 7206 chassis

• Diagnostics

– Indicator LEDs

4-port, U-interface version: 3 LEDs per port: B1 & B2

call establishment, and NT1 status

8-port, S/T-interface version: 2 LEDs per port: B1 & B2

call establishment

– 3 Loopback modes:

System Loopback allowing field tests of ports with or

without physical connection

NT Loopback loops BRI ports back to the line interface

(i.e. to a Network Termination device)

Plug Loopback physically accomplished via an external

plug connecting transmit to receive transformers. Plug

Loopback is supported on the S/T interfaces only.

• Clock interface

– Support for local or network synchronization;

Established connections defer to network for clock

– Master clock can be derived from any single port

– Watchdog function can detect and recover from

loss-of-clock

• Regulatory

– CCITT Recommendation I.430, 1992

For network administrators who require the higher

performance provided by a Primary Rate Interface (PRI)

ISDN connection, Cisco offers two options for both the

Cisco 7200 and 7500 Series routers: a two-port

channelized-T1 port adapter, and a two-port channelized-E1

port adapter.

The channelized T1 port adapter can support up to 23

B-channels per port, for an aggregate data rate of 1.536 Mbps

per port. When configured to operate in channelized mode, all

24 channels are available per port.

The channelized E1 port adapter can support up to 30

B-channels per port, for an aggregate data rate of 1.984

Mbps per port. When configured to operate in channelized

mode, up to 31 channels are available per port. The E1 port

adapter is also available in two versions: one supporting

75W-unbalanced interfaces, and another supporting

120W-balanced interfaces.

The PRI port adapters enable applications that

require remote and branch office locations to be cost

efficiently terminated on a single router in a corporate

enterprise network. Coupled with Cisco’s BRI port

adapters (4 and 8 port versions), the PRI/Channelized port

adapters can be used cost effectively to provide

high-density terminations of multiple remote-site routers

on either the Cisco 7200 or 7500 Series routers.

All PRI port adapters support two ports on a single-wide

port adapter, and allow concurrent operation of both ports.

Because of their ability to provide router access for

high-speed ISDN networking connections, PRI port adapters

are ideal for applications involving regional office

connections into central corporate locations. Cisco’s PRI port

adapters are supported on both the Cisco 7200 Series routers

and the Cisco 7500 Series routers with Versatile Interface

Processors.

• High-speed, high-volume ISDN connectivity

– Two physical ports per port-adapter

– Support for up to 62 WAN channels per port adapter

• Two versions, supporting either T1 or E1 interfaces

• Flexible functionality

– Support for channel concatenation of logical channels

into one logical superclean.

– Supports load sharing across B-channels

– Supports ISDN, X.25, HDLC, Frame Relay, LAPB, and

PPP encapsulation across different channels

• Supports On-line Insertion/Removal (OIR)

• Mechanically-keyed to prevent incorrect slot-installation

• Supports ISDN MIBs

• Supports full Cisco IOS

• Supports hardware- and software-based compression