Cisco Systems MGX 8220 4-30, asynchronous timing. Asynchronous timing is supported using SRTS and adaptive clock recovery., An illustration of the 8-port CESM cards is provided in Figure4-15.

4-30
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 framingOnVcDi sco nnect. 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 detect ed 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 Figure4-15.
Figure4-15 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