ZhoneV52-MIB Table View

V5.2 Interface Group table.  
          
A V5.2 interface contains 1-16 E1 links.  The protocols 
defined in the ETSI V5.2 specification (ETS 300 347-1) 
are carried across the interface that is located between 
the AN and the LE.  The V5 interface is a logical concept.

V5.2 Interface Group LAPV table.  
          
This table contains the configurable LAPV 
parameters for the interface group.  It augments 
the v52InterfaceGroupTable.  When an 
v52InterfaceGroupEntry is created, a corresponding 
row in the v52InterfaceGroupLapvTable will be 
created. All read-create objects must be provided 
for the SET if the DEFVAL, if one is defined, is 
to be over-ridden.

Table of provisioned 2.048 Mbit/s E1 links,
          
The term link is a logical concept used to 
describe a communication channel between
two points.  in V5 there are many kinds of 
links: E1 links, data links, etc.  The
term link is used to mean E1 link.

Communication Channel (C-channel).  C-paths (see 
v52CPathTable) are carried over C-channels (communications
channels).  In V5, there are two types of C-channels,
logical and physical.  Information about logical and
physical C-channels is included in the provisioning
data for V5.2 interfaces.  A C-path associated with a
logical C-channel is protected.  A C-path associated with
a physical C-channel is not protected.
          
In V5.2 only, logical C-channels carry a group of one
or more C-paths, excluding the C-paths for the protection 
protocol.  A logical C-channel may consist of the C-paths
for the Control, Link Control, and BCC protocols.  Another
logical C-channel may consist of the C-path for the PSTN 
protocol.  A third logical C-channel may consist of the 
C-paths for ISDN Ds-type data and ISDN p-type data. A V5.2
interface may contain up to 44 logical C-channels and each
logical C-channel on an interface is uniquely identified 
in V5.2 with a 16-bit logical C-channel identifier.
          
The goal of the protection protocol is to protect the C-paths
for the V5 Signaling protocols (ie, BCC, Control, etc) 
as well as the C-paths for ISDN D-channel data. However,
the protection protocol is designed to protect logical 
C-channels, not C-paths.  Therefore, in order to protect
a C-path, it must be associated with a logical C-channel.
This association is made as part of the provisioning variant.
          
A physical C-channel consists of a time slot (64kbit/s) on
an E1 that carries a C-channel (C-channels are used to 
carry signaling traffic).  All physical C-channels are
restricted to timeslots 16, 15, and 31 in accordance with
the ETSI specification.  
          
If logical C-channels are in use, each logical C-channel 
is mapped to one and only one physical C-channel.  This 
restriction is mandated by the role of the protection 
protocol.  The protection protocol, which protects logical 
C-channels, can only protect a single logical C-channel 
per protection switch over.  This implies an implicit 
limitation of one logical C-channel per physical C-channel.
          
For a V5.2 interface, the physical C-channels are identified
by a logical link ID and a timeslot.  Each V5.2 interface can
support a maximum of 48 physical C-channels (timeslots 16,
15, and 31 on up to 16 E1 links; 3 * 16 = 48).
          
Physical C-channels are not available for bearer connections.
The physical C-channels are identified at provisioning 
time and when ISDN ports with D-channel signaling are 
added.

C-paths consist of a layer 2 data link carrying an 
associated layer 3 signaling protocol.  Layer 3 
signaling is defined by the Control, Link Control,
PSTN, BCC, and Protection protocols.  Therefore, a 
C-path can exist for the Control protocol, the Link
Control protocol, the PSTN protocol, the BCC protocol, 
and the Protection protocol.  In addition, ISDN 
D-channel data is also carried over C-paths.  Separate
C-paths exist for ISDN Ds, p, and f-type data. 
There can only be one of each control, link control, and
BCC C-Paths whereas multiple PSTN and ISDN C-Paths may
exist.
          
A group of C-Paths are associated with a C-channel.  
The C-path for protection, however, is not carried in 
a C-channel.

The User Port Table holds information regarding the
PSTN and ISDN user ports.  Information regarding the
provisioning and availability status of the port is
maintained.  If a user port is busy, information 
regarding the allocation status of Bearer Channels
to the user port is maintained and tracked by the
configuration.  If the port is put out of service
for maintenance, the port is marked unavailable.

The V5.2 Interface Group Statistics Current Table.
          
The V5.2 Interface Group Statistics current 
table contains various statistics being collected 
for the current 15 minute interval.  
          
The maximum number of entries is identical to that
of the Interface Group Table. The interfaceGroupTable
is the base table for this augmented table.

V5.2 Interface Group Statistics Interval Table. 
          
The V5.2 Interface Group Statistics Interval 
Table contains various statistics collected by 
each Interface Group over the previous 6. 12.
18, or 24 hours of operation.  The past 6, 12,
18, or 24 hours are broken into 24, 48, 72, or
96 completed 15 minute intervals.  Each row in 
this table represents one such interval 
(identified by igIntervalNumber) for one 
specific instance (identified by igIntervalIndex).

V5.2 Interface Group Statistics Total Table. 
          
The V5.2 Interface Group Statistics Total 
Table contains the cumulative sum of the 
various statistics for the 24 hour period 
preceding the current interval.
          
The maximum number of entries is identical to that
of the Interface Group Table. The v52InterfaceGroupTable
is the base table for this augmented table.

This is the extension of the v52InterfaceGroupTable for
extra configuration and monitoring variables for the
V5.2 interface group.

This table is read-only and is derived from the protection
group provisioning information from the v52CChannelTable.
          
Unlike the C-Paths defined in v52CPathTable, C-Paths for the
protection protocol are not carried over logical C-Channels.
          
For each Interface Group, there will always be two C-Paths
for protection protcol when an active and a standby CChannel
are provisioned in protection group 1. The active and
standby C-Channels for the group 1 protection shall always
carry the two C-Paths for the protection protocol
respectively and the protection C-Paths shall not be
switched by the protection mechanism.
          
When an Interface Group has no protection group provisioned
in the v52CChannelTable, there will be no entries in this
table for this Interface Group.