An administrator is trying to change the default LINECODE for a voice ISDN T1 PRI. Which command makes this change?
A. linecode esf
B. linecode ami
C. linecode hdb3
D. linecode b8zs
An administrator is trying to change the default LINECODE for a voice ISDN T1 PRI. Which command makes this change?
A. linecode esf
B. linecode ami
C. linecode hdb3
D. linecode b8zs
https://www.cisco.com/c/en/us/td/docs/switches/metro/me3600x_3800x/software/release/15-3_1_S/chassis/configuration/guide/3600x_24cxscg/sw_T1-E1.pdf
It Says: “b8zs—Specifies binary 8-zero substitution (B8ZS)as the linecode type. Valid for T1 controller only.
This is the default for T1 lines”
default = b8zs for a T1
Guys is clearly stated in the link below: Default is ami (alternate mark inversion) for T1 lines; hdb3 (high-density bipolar 3) for E1 lines.
https://www.cisco.com/c/en/us/td/docs/ios/voice/cminterop/configuration/guide/12_4t/vc_12_4t_book/vc_mgcp_t1cas.html
So if the default is AMI for a t1 pri, then we must change it to b8zs
stop confusing ppl with your guesses.
B
Excuse me, It seems my link is related to an old version.
D
The question is asking to change from default (which is AMI) for T1 line. So the correct answer is b8zs.
Default is AMI (alternate mark inversion) for T1 lines; hdb3 (high-density bipolar 3) for E1 lines.
https://www.cisco.com/c/en/us/td/docs/ios/voice/cminterop/configuration/guide/12_4t/vc_12_4t_book/vc_mgcp_t1cas.html
• ami—Specifies Alternate Mark Inversion (AMI) as the linecode
type. Valid for T1 and E1 controllers.
• b8zs—Specifies binary 8-zero substitution (B8ZS) as the linecode
type. Valid for T1 controller only. This is the default for T1 lines.
• hdb3—Specifies high-density binary 3 (HDB3) as the linecode type.
Valid for E1 controller only. This is the default for E1 lines.
If we change the default is from b8zs to ami.
The correct option is B