controller T1 1/0:11 framing esf

channel-group 20 timeslots 1-24 speed 64

!

controller T1 1/0:12 framing esf

channel-group 20 timeslots 1-24 speed 64

!

controller T1 1/0:13 framing esf

channel-group 20 timeslots 1-24 speed 64

!

controller T1 1/0:14 framing esf

channel-group 20 timeslots 1-24 speed 64

!

controller T1 1/0:15 framing esf

channel-group 20 timeslots 1-24 speed 64

If you are having trouble:

If the Layer 1 Status is “Deactivated,” make sure that the cable connection is not loose or disconnected. This status message indicates a problem at the physical layer.

There may be a problem with your telco, or the framing and line code types you entered may not match your telco’s. A Layer 2 error indicates that the universal gateway cannot communicate with the telco. There is a problem at the data link layer.

Configuring the D Channels for ISDN Signaling

The ISDN D channels carry the control and signaling information for your ISDN calls—for both circuit-switched data calls, and analog modem calls.

The D channel notifies the central office switch to send the incoming call to particular time slots on the Cisco universal gateway. Each one of the B channels carries data or voice. The D channel carries signaling for the B channels. The D channel identifies if the call is a circuit-switched digital call or an analog modem call. Analog modem calls are decoded and then sent off to the onboard modems. Circuit-switched digital calls are directly relayed to the ISDN processor in the gateway.

When you configured your ISDN PRI on the CT1 or CE1 controller, you automatically created a serial interface that corresponds to the PRI group time slots. This interface is a logical entity that is associated with the specific controller. After the serial interface is created, you must configure the D channel serial interface that carries signaling. The configuration applies to all the PRI B channels (time slots) for that PRI group.

The following table shows the logical contents of a ISDN PRI interface used in a T1 network configuration. The logical contents includes 23 B channels, one D channel, 24 time slots, and 24 virtual serial interfaces (total number of Bs + D).

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Cisco Systems Cisco AS5400, Cisco AS5350 quick start Configuring the D Channels for Isdn Signaling

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.

On the other hand, the Cisco AS5400 takes this functionality a step further by offering enhanced capabilities suited for more demanding environments. It supports both voice and data services, allowing service providers to deliver a comprehensive solution that includes voice calls, multimedia applications, and broadband services. The AS5400 features a modular design, allowing users to adapt the device to specific needs by adding or removing modules as required. This modularity enhances flexibility and future-proofs the system against evolving technology demands.

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.