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Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter
Circuit Emulation Service Modules
• T1 (1.544 Mbps) and E1 (2.048 Mbps) physical interfaces using either synchronous or
asynchronous timing. Asynchronous timing is supported using SRTS and adaptive clock recovery.
• The special port type of framingOnVcDisconnect. This port type prevents a remote end CPE from
going to LOF by configuring a T1/E1 line in remote loopback mode when a connection
deletion/suspension is detected at the ATM interface.
• Ability to detect/display Yellow Alarm for T1 ESF framing.
An illustration of the 8-port CESM cards is provided in Figure 4-15.
Figure 4-15 8-Port CESM Cards
• • • • •
ACT
STBY
FAIL
PORT 1
PORT 2
1T1
CESM
• • • • •
ACT
STBY
FAIL
PORT 1
PORT 2
1E1
CESM
E1 Front card
E1 Front card
11759
• • • • •
ACT
STBY
FAIL
PORT 1
PORT 2
PORT 3
PORT 4
8T1
CESM
• • • • •
ACT
STBY
FAIL
PORT 1
PORT 2
PORT 3
PORT 4
PORT 5
PORT 6
PORT 7
PORT 8
PORT 5
PORT 6
PORT 7
PORT 8
8E1
CESM
T1 Front card
T1 Front card