Relationship of ISDN PRI Components for T1

 

 

 

 

Virtual

 

 

 

 

serial

Channel

Time slot

interface

type

 

number

number

 

 

 

 

 

 

B

(data channel)

1

S0:0

 

B

(data channel)

2

S0:1

 

B

(data channel)

3

S0:2

 

B

(data channel)

4

S0:3

 

 

 

 

 

 

 

 

 

 

 

B

(data channel)

21

S0:20

 

 

B

(data channel)

22

S0:21

 

 

 

 

 

 

 

B

(data channel)

23

S0:22

 

 

 

 

 

 

 

D

(signaling channel)

24

S0:23

 

 

 

 

 

 

Logical contents of a PRI interface

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Note When you configure your CT1 controller for an Non-Facility Associated Signaling (NFAS) backup D channel, a serial interface is automatically created only when your primary D channel fails.

To configure ISDN signaling, follow these steps:

Step 1 Enter the enable command and password to go to privileged EXEC mode. You are in privileged EXEC mode when the prompt changes to Gateway#.

Gateway> enable

Password: password

Gateway#

Step 2 Enter global configuration mode. You are in global configuration mode when the prompt changes to Gateway(config)#.

Gateway# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Gateway(config)#

Step 3 Enter serial interface configuration mode. After configuring the CT1 controller, a corresponding D-channel serial interface is automatically created. For example, serial interface 1/0:23 is the D channel for CT1 controller 1. You must configure each serial interface to receive incoming signaling and send outgoing signaling.

Note On a CE1 PRI line, the serial interface for the D channel is 1/0:15.

Gateway(config)# interface serial 1/0:23

Gateway(config-if)#

Step 4 Assign an IP address and subnet mask to the interface:

Gateway(config-if)#ip address 172.16.254.254 255.255.255.0

Step 5 Configure all incoming voice calls.

Note This command has two possible keywords: data and modem. You must use the modem keyword to enable both modem and voice calls. The modem keyword represents bearer capabilities of speech.

Gateway(config-if)#isdn incoming-voice modem

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Cisco Systems Cisco AS5350, Cisco AS5400 Gatewayconfig# interface serial 1/023, Gatewayconfig-if#ip address 172.16.254.254

Cisco AS5400, Cisco AS5350 specifications

Cisco Systems is a global leader in networking and telecommunications technology, and its AS5350 and AS5400 models are prominent offerings in their product line. These devices cater primarily to service providers and large enterprises looking for advanced VoIP, data, and multimedia capabilities.

The Cisco AS5350 is a versatile voice gateway that supports a wide range of protocols including VoIP and PSTN (Public Switched Telephone Network). Designed for scalability, it can handle numerous simultaneous calls, making it an ideal solution for businesses that require robust communication systems. Some of its main features include built-in support for various signaling protocols such as SIP (Session Initiation Protocol) and H.323, which allow seamless integration with existing networks. Additionally, the AS5350 is equipped with high-density digital signal processors (DSPs) that enable efficient call processing and transcoding, ensuring high-quality voice transmission.

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Both the AS5350 and AS5400 incorporate advanced security features to protect sensitive communications and data. Features such as encryption, secure signaling, and network access controls are essential for enterprises looking to safeguard their operations in an increasingly vulnerable digital landscape. These gateways also support Quality of Service (QoS) protocols, ensuring that voice traffic is prioritized over other types of data, thereby maintaining call clarity even in times of high data demand.

In conclusion, the Cisco AS5350 and AS5400 are compelling solutions that showcase Cisco's commitment to delivering reliable and high-performance telecommunications devices. By offering state-of-the-art technology, robust features, and a modular approach to scalability, businesses and service providers can ensure they remain competitive in the ever-evolving telecommunications landscape. Whether it is for voice, data, or multimedia applications, these gateways deliver the performance and flexibility needed to meet current and future challenges.