You can configure a channelized T1/E1/ISDN PRI interface for T1 or E1 or ISDN PRI service.
On a channelized T1/E1/ISDN PRI PIM configured for channelized operation, you can use the "drop-and-insert" feature to integrate voice and data on a single T1 or E1 link, and save the cost of two lines.
This overview contains the following topics:
Each port on a channelized T1/E1/ISDN PRI PIM is software configurable for T1, E1, or ISDN PRI service. Each channelized T1 or E1 interface can be configured as a single clear channel, or for fractional (NxDS0) or channelized operation, where N is channels 1 to 31 for an E1 interface and channels 1 to 24 for a T1 interface.
Each channelized interface can be configured as ISDN PRI B-channels and one D-channel or as a combination of T1 or E1 DS0 channels and ISDN PRI channels.
J-series ISDN PRI interfaces support the following switch types:
For more information, see ISDN PRI Transmission on Channelized Interfaces.
Channelized T1/E1/ISDN PRI interfaces are configured through a configuration editor only.
A channelized T1/E1/ISDN PRI interface supports CoS configuration. For information about CoS features, see Class-of-Service Overview and Configuring Class of Service.
On channelized T1/E1 interfaces configured for channelized operation, you can insert channels (time slots) from one port (for example, channels carrying voice) directly into the other port on the PIM, to replace channels coming through the Routing Engine. This feature, known as drop and insert, allows you to integrate voice and data on a single T1 or E1 link by removing the DS0 time slots of one T1 or E1 port and replacing them by inserting the time slots of another T1 or E1 port. You need not use the same time slots on both interfaces, but the time slots count must be the same.
The channels that are not configured for the drop-and-insert feature are used for normal traffic.
The Dual-Port Channelized T1/E1/ISDN PRI PIM provides support for ISDN PRI services such as dial-in at the central office, callback from the central office, and primary or backup network connections from branch offices. For more information about the services, see Configuring ISDN.
You can configure up to 23 time slots in a channelized T1 PRI interface and up to 30 time slots in a channelized E1 PRI interface as B-channels. The 24th time slot in a T1 interface and the 16th time slot in an E1 interface are configured as the D-channel interface for signaling purposes. Each B-channel supports 64 Kbps of traffic. The unconfigured time slots can be used as regular DS0 interfaces on top of the T1 or E1 physical layer.
You can install channelized T1/EI/ISDN PRI PIMs and ISDN BRI PIMs and configure both ISDN PRI and ISDN BRI service on the same J-series device.
