v52CChannelTable

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.

MIB

ZhoneV52-MIB

OID

.1.3.6.1.4.1.5504.4.3.2.4

Type

table

Status

current

Parent

zhoneV52

Siblings

11

Children

1