
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 | |
| Frame Relay |
|
| Q.921 |
|
| Q.931 |
|
| Q.SIG |
|
|
|
|