Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 633

ce1-fpc/pic/port e1-options]
level:
For a list of supported algorithms, enter a
example:
Configuring the E1 Frame Checksum
By default, the E1 interface supports a 16-bit checksum. You can configure a 32-bit
checksum, which provides more reliable packet verification. However, some older
equipment might not support 32-bit checksums.
To configure a 32-bit checksum, include the
interface-name e1-options]
To return to the default 16-bit frame checksum, delete the
the configuration:
To explicitly configure a 16-bit checksum, include the
interfaces interface-name e1-options]
Configuring E1 Framing
By default, E1 interfaces use the G704 framing mode. You can configure the
alternative unframed mode if needed.
To have the interface use the unframed mode, include the
[edit interfaces interface-name e1-options]
option:
[edit interfaces ce1-fpc/pic/port e1-options]
bert-algorithm algorithm;
[edit interfaces e1-fpc/pic/port e1-options]
bert-algorithm algorithm;
[edit interfaces ce1-0/0/0 e1-options]
user@host# set bert-algorithm ?
Possible completions:
pseudo-2e11-o152 Pattern is 2^11 -1 (per O.152 standard)
pseudo-2e15-o151 Pattern is 2^15 - 1 (per O.152 standard)
pseudo-2e20-o151 Pattern is 2^20 - 1 (per O.151 standard)
pseudo-2e20-o153 Pattern is 2^20 - 1 (per O.153 standard)
hierarchy level:
[edit interfaces interface-name e1-options]
fcs 32;
[edit]
user@host# delete interfaces e1-fpc/pic/port e1-options fcs 32
[edit interfaces interface-name e1-options]
fcs 16;
[edit interfaces interface-name e1-options]
Chapter 29: Configuring E1 Interfaces
or
[edit interfaces e1-fpc/pic/port e1-options]
? after the
fcs 32 statement at the
hierarchy level:
hierarchy level, specifying the
Configuring the E1 Frame Checksum
hierarchy
bert-algorithm statement; for
[edit interfaces
fcs 32 statement from
fcs 16 statement at the [edit
framing statement at the
unframed
563