How to Configure PRI on Cisco 3845 Router with C3845-adventerprisek9-mz.151-3.T3.binl Image
If you have a Cisco 3845 router with C3845-adventerprisek9-mz.151-3.T3.binl image, you may want to configure PRI (Primary Rate Interface) for voice over IP (VoIP) services. PRI is a standard for providing multiple voice and data channels over a single T1 or E1 line. In this article, we will show you how to configure PRI on your Cisco 3845 router with C3845-adventerprisek9-mz.151-3.T3.binl image.
Before you start, make sure you have the following:
A Cisco 3845 router with C3845-adventerprisek9-mz.151-3.T3.binl image. This image is an advanced enterprise services image that supports voice and data features.
A T1 or E1 line with PRI service from your service provider.
A VWIC2-1MFT-T1/E1 card installed on your router. This card provides one T1 or E1 interface for connecting to the PRI line.
A console cable and a terminal emulator software for accessing the router's command-line interface (CLI).
Follow these steps to configure PRI on your Cisco 3845 router with C3845-adventerprisek9-mz.151-3.T3.binl image:
Connect the console cable to the router's console port and your computer's serial port. Launch the terminal emulator software and set the baud rate to 9600, data bits to 8, parity to none, stop bits to 1, and flow control to none.
Power on the router and press Enter to access the CLI. If prompted, enter the username and password for privileged mode access.
Enter the global configuration mode by typing configure terminal and pressing Enter.
Configure the T1 or E1 interface by typing interface serial0/0/0 and pressing Enter. Replace serial0/0/0 with the actual interface number of your VWIC2-1MFT-T1/E1 card.
Specify the line type as T1 or E1 by typing card type t1 or card type e1 and pressing Enter.
Specify the framing format as ESF or CRC4 by typing framing esf or framing crc4 and pressing Enter.
Specify the line code as B8ZS or HDB3 by typing linecode b8zs or linecode hdb3 and pressing Enter.
Specify the clock source as line or internal by typing clock source line or clock source internal and pressing Enter. The clock source determines which device provides the timing signal for synchronizing the data transmission. Usually, the service provider's device is the clock source, so you should use clock source line.
Create a voice port for PRI by typing pri-group timeslots 1-24 or pri-group timeslots 1-31 and pressing Enter. This command assigns all the available timeslots on the T1 or E1 line to the voice port. You can also specify a subset of timeslots if you want to reserve some for data channels.
Exit the interface configuration mode by typing exit and pressing Enter.
Create a dial peer for outgoing calls by typing dial-peer voice 100 pots and pressing Enter. This command creates a dial peer with an arbitrary number 100 and specifies that aa16f39245