18CHAPTER 1: INTRODUCING THE ROUTER 3000 FAMILY

Table 21 Attributes of the CT1/PRI Port (continued)

Attribute

CT1/PRI Description

E1/CE1/PRI Description

 

 

 

Operating mode

Channelized T1

E1

 

Fractional T1

Channelized E1

 

ISDN PRI

Fractional E1

 

 

ISDN PRI

 

 

 

Services

Backup

 

 

Terminal access

 

 

ISDN

 

 

 

 

Protocols

PPP

 

 

MP

 

 

HDLC

 

 

LAPB

 

 

X.25 (ITU-T X series Recommendations)

 

Frame Relay

 

 

Q.921

 

 

Q.931

 

 

Q.SIG

 

 

 

 

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3Com 3012 (3C13612), 3015 (3C13615), 3013 (3C13613), 3018 (3C13618), 3016 (3C13616) manual Isdn PRI