Channelized T1/ISDN PRI Network Modules

Connecting Cisco ISDN PRI Network Modules to the Network

Figure 4	Connecting a Channelized T1/E1 PRI Network Module with G.703 to a Networking
	Device

NM-1CE1T1-PRI

RX	TX		CD	LP
MON	MON	RA
		RA

E1-BAL

AIM

CTLR 0

E1-UNBALEN

88639

This section provides information about the following network modules for Cisco modular routers:

•1-port channelized T1/ISDN PRI network module (NM-1CT1 or CPANM-1CT1) (see Figure 5). This module is also referred to as the 1-port CT1/PRI network module.

•2-port channelized T1/ISDN PRI network module (NM-2CT1 or CPANM-2CT1) (see Figure 6). This module is also referred to as the 2-port CT1/PRI network module.

Figure 5		1-Port Channelized T1/ISDN PRI Network Module
cT1
PRI
REMOTE ALARM LOCAL ALARM	LOOPBACK	CARRIER DETECT	EN
			CTRLR 0

H7460

CT1/PRI-U port (DB-15)

Figure 6				2-Port Channelized T1/ISDN PRI Network Module
cT1	REMOTE ALARM LOCAL ALARM	LOOPBACK	CARRIER DETECT	EN
PRI
				CTRLR 1
	REMOTE ALARM LOCAL ALARM	LOOPBACK	CARRIER DETECT	EN

CTRLR 0

CT1/PRI-U ports (DB-15)

H7461

Connecting CT1/PRI Modules to the Network

To connect a CT1/PRI module to the network, use a DB-15-to-DB-15 T1 serial cable to connect the CT1/PRI port to a T1 channel service unit (CSU). (See Figure 7.) These ports are color-coded tan.

Connecting Cisco ISDN PRI Network Modules to the Network