Verilink QPRI 2921 (880-503143-001) Product Manual User Manual

Page 42

Configuring the QPRI 2921 Via the NCM 2000 Craft Interface

3-8

Verilink QPRI 2921

NDn

Network Density: Use this option to specify the type of network density

enforcement to use with PRI line coding. Digital transmissions over public

switched telephone network lines cannot support long strings of zeros

(repeaters and clocking devices lose synchronization). Therefore, the

density algorithms ensure that a minimum pulse density is met to ensure

stable system timing.
Choose one of the following if using 64K AMI. Note that these options are

ignored with B8ZS line code:
None: does not insert a one. Use this option with B8ZS or a 56K channel.

Also recommended for ISDN capability.
80 zeros: inserts a one into every string of more than 80 consecutive zeros.
15 zeros: inserts a one into every string of more than 15 consecutive zeros.
12.5% & 80 zeros: inserts a one into every string of eight or more

consecutive zeros when the average density of ones fall below 12.5% or if

there are more than 80 consecutive zeros.
TR 62411: inserts a one into every string of more than 15 consecutive

zeros or when there are less than a minimum number of N ones in every

window of 8(N+1) data bits (12.5%). N can be any value from 1 to 23. This

option is the same as 12.5% + 15 zeros.

1) NONE

2) 80 zeros

3) 15 zeros

4) 12.5% & 80

zeros

5) TR 62411

NLn

Network Initiated Loop: Use this option to specify if you wish to allow your

QPRI to be remotely put into a line loopback.

Yes or No

(Y/N)

Alarm Declare Time (sec): Use this option to indicate how many seconds

will elapse before a message regarding a problem is displayed.

0..127 seconds

DLn

FDL Enable/PRM Enable: Facility Data Link (FDL). The ESF

Facility Data Link

is used to transmit performance registers and controls, error events, and

loopback controls. The FDL uses 4 kbit/s of bandwidth to transmit

messages. This option only enables or disables the FDL. It only reports if

you have the Performance Report Message Command/Response (PRM C/R)

bit enabled or disabled. To change this option’s status or configuration,

select the FDL Configuration command (

) and use the

(PRM C/R bit)

option.
Note: Enabling this option is meaningless for ports in SF mode.

Yes or No

(Y/N)

Enable Inband ISDN: Turns on access to one of the channels in the option

fields for inband communication. To receive and transmit remote

configuration and diagnostic information, the channel has to be enabled on

both ends.
This command is used to enable an inband channel or ISDN D-channel, or

disable both. An inband channel uses a timeslot (DS0) to send and recieve

remote configuration and diagnostic information. An ISDN D-channel is

used for ISDN call set-up and other messages. Both ends must have the

same option selected. Select the Inband Timeslot option below before

implementing this command.

1) Inband

enable

2) ISDN enable

3) Both disable

Inband Timeslot: Select one of the 24 timeslots for inband management

before enabling the inband ISDN as described above. ISDN normally uses

timeslot 24 for this function.

1-24

FDL Configuration: Brings up a submenu of choices. Figure 3-5, Table 3-6.
Note: This option and associated submenus are meaningless for ports in SF

mode.

Timing: This brings up the Configuration Menu (Timing Options), Figure

3-6, Table 3-7.

Exit this Screen: Returns you to the Configuration Menu, Figure 3-3, Table

3-4.

Command

Description

Options