DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Commands
8-40busyout fiber-link
8
This command puts a spec ified DS1 facility of a DS1C Complex into a
maintenance busy state. Each DS1C comp lex uses from 1 to 4 DS1 facilities.
One of the facilities, called the packet facility, carries the control c hannel for all
facilities in the complex, a ll packet traffic, and some c ircuit connections. The
other facilities carry c ircuit connections only. Whenever the circuit p ack resets,
the packet facility is set o n the “a” facility. If system software detects a problem
with this facility, it switches the packet and control traffic to another facility. The
busyout command is not allowed o n the packet facility unless the overrid e
qualifier is used. When the override is used , all packet and c ircuit traffic on the
packet facility is switc hed to one of the other 3 facilities; all traffic that was on the
destination facility before the switch is dropped . There is no way to tell which
facility is carrying the p acket and control traffic wi thout attempting to busy it out
.
If there is only 1 facility left in service on the c ircuit pack, it cann ot be busied out.
In this case, the circuit p ack must be busied .
!CAUTION:

Busying out a non-packet facility disrupts all traffic c arried on that facility.

Use of the override command to busy the packet facil ity disrupts all traffic

on the facility to which the pac ket and control traffic is moved . Which facility

this is cannot be deter mined in advance.

On critical reliability syst ems (duplicated PNC) a facili ty on the active PNC
cannot be busied out. To busyout a facility on the standby PNC, the standby PNC
must first be busied out b y busyout pnc.
busyout fiber-link
busyout fiber-link fiber# [a-pnc | b-pnc]
The busyout fiber-link com mand puts a specified fiber link into a maintenance
busy state. (See Busyout and Release Commands at the beginning of this
chapter). A fiber link is a c onnection carrying all c ircuit and packet traffic
between two port networks, two switc h nodes, or a port network and a switch
node. A fiber link may co ntain a DS1 CONV complex used to provide
connectivity to a remote EPN.
!CAUTION:

On systems with simplex PNC, the busyout command is destructive. All

calls and app lication links carried on the b usied out fiber link will be torn

down, and new calls will n ot be established over the link.

On systems with duplicated PNC, the command is allowed only on a fib er link on
the standby PNC, doe s not i m pact service, and requi res that the standby PNC be
busied first.
For more information on fiber links, see FIBER-LNK in Chapter 9.