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                CFE AXE /S12 V 5.2 Multilink Help 
                ---------------------------------
S12 supports V5.2 interface implementation according ETSI V5-Interface standards 
(ETS 300 324 / ETS 300 347).  

CFE checks for the V5 Interface ID [logical identity] and the C state of the B channels.

CFE can check the for the device list and while highlight abnormal Cstates (not UPC) 

CFE then checks specified devices for C states and device and ABS states.

                Generic Alcatel Description of the V5.2 Implemetation
                ----------------------------------------------------- 
V5.2 is an ETSI interface operating over a number of 2 Mbit/s
PCM links. V5.2 employs one primary 2 Mbit/s link, one secondary 2 Mbit/s link and 
optionally up to 14 additional 2 Mbit/s links. 

The Primary 2Mbit/s link uses TS 16 for the signalling channel carrying the V5.2 protocol.
The TS 16 on the Secondry 2Mbit/s link is used for the standby V5.2 signalling channel.

The primary and secondary links are terminated in the local exchange by separate IPTMV52 
modules. The optional links can be terminated by either IPTMV52 modules or DV52TCE modules.
The bearer channels of the links are allocated flexibly on a call by call basis to provide
a concentration capability within the access network. The maximum link configuration of one 
V5.2 interface provides a connection capability of 8192 PSTN subscribers or 2121 ISDN 
subscribers.

                Permissable States for V5 Services & Routes
                -------------------------------------------        
Both the V5 PCM-link operational state and the individual services share the same states.
The following is the decodes for these states:      
1. ??   error by inquirering the state   
2. BE   blocked error   
3. BL   blocked   
4. BP   blocked prepared   
5. BU   busy   
6. FR   free   
7. IF   internal free   
8. NC   not created   
9. RB   remote blocked 

                Communication Channel States for V5 Routes
                ------------------------------------------       
C-channel state      
ACTIVE    active   
BLCKERR   blocked error   
BLCKPRE   blocked prepared   
BLOCKED   blocked   
BUSY      busy   
ERROR     error   
FREE      free   
INTFREE   internal free   
LBL_ACT   local blocked active   
LBL_STB   local blocked standby   
NOT CRE   not created   
OBL_ACT   other blocked active   
OBL_STB   other blocked standby   
PHYSICL   physical   
RBL_ACT   remote blocked active   
RBL_STB   remote blocked standby   
REMBLCK   remote blocked    
STANDBY   standby   
UNKNOWN   error by inquirering the state   
  
				OTHER TERMS USED
				---------------- 
AN  		Access network
 
BCC  		Bearer channel connection protocol
 
Bearer channel  A 64 kbit/s timeslot in the V5 interface which is used to provide the bidirectional transmission of user information for either the B-channel of an ISDN user port or a PCM-encoded 64 kbit/s channel from a PSTN user port.
 
C-channel  	Communication channel
		A 64 kbit/s timeslot in the V5 interface which is used for communication 
		purposes (rather than a bearer channel). An active communication channel 
		may carry one or more communication paths. A standby communication channel 
		is used for protection of active communication channels.

Logical C-Ch 	a group of one or more C-paths, excluding the protection protocol C-path, 
		which will be carried on a physical C-channel of protection group 1 or 2. 
		The logical C-channel is identified by the logical C-channel ID.

Physical C-Ch	Cannot carry a bearer channel and is assigned to carry a logical C-channel. 
		The timeslot 16 on the primary and secondary links must always be a Physical
		C-channel.

Active C-Ch	A physical C-channel that currently carries a logical C-channel. 
		An active C-channel becomes a standby C-channel when it is not carrying a 
		logical C-channel.

Standby C-Ch	A physical C-channel that is not carrying a logical C-channel, but is used 
		for the protection of logical C-channels. Once it is used to carry a logical
		C-channel, a standby C-channel becomes an active C-channel.
 
C-path  	Communication path.  A Layer 2 data link carrying one of the V5 protocols 
		(PSTN, control, bearer channel connection, link control or protection 
		protocol), ISDN Ds-data, ISDN p-data or ISDN f-data.
 
DV52TCE  	Digital trunk unit terminal control element for V5 interface
 
EFADDR  	Envelope function address.  An EFADDR is a 13-bit binary coded number used 
		in the link access protocol LAPV5-EF frame to identify different 
		V5-enveloping function sublayer connections, each of them used to support 
		a relaying mechanism for each of the user frames
 
IPTMV52  	Integrated packet trunk module for V5 interface
 
LE  		Local exchange
 
Primary link  	The 2 Mbit/s link in a multilink V5.2 interface whose physical C-channel in timeslot 16 carries carries a C-path for the protection protocol and, on V5.2 initialization, also the C-path for the control protocol, link control protocol, and the BCC protocol. Other C-paths may also be carried in the timeslot 16.
 
Protection GP	A group of N+K physical C-channels, where K is the number of physical 
		C-channels which act as standby C-channels for the N logical C-channels.
 
Secondary link  The 2 Mbit/s link in a multilink V5.2 interface whose timeslot 16 carries a 
		C-path for the protection protocol and, on V5.2 initialization, acts as the 
		standby C-channel for the control protocol, link control protocol, and the 
		BCC protocol and any other C-paths initially carried in timeslot 16 of the 
		primary link.
 
Additional Alcatel Protocol Information
---------------------------------------

There are five protocols operating in the V5.2 interface :
1. BCC (bearer channel connection) protocol, used to control the through-connection of the 
user speech path via a timeslot in the V5.2 interface. 
2. Control protocol, consisting of port control and common control protocols. 
The port control protocol is used for controlling the operational status of an individual 
port in the access network. The common control protocol contains functional elements for t
he control of the whole V5.2 interface. 
3. Link control protocol, which verifies the correct interconnection of PCM links between 
LE and AN. This protocol also allows blocking/unblocking of the PCM link. 
4. Protection protocol, used to control switching of the active/standby C-channels. 
he protection protocol messages are always transported over the C-channel in timeslot 16 
of the primary and secondary PCM links. In order to avoid loss of information, every 
message is sent at the same time on the primary and secondary links; the first message 
received is evaluated. 
5. PSTN protocol 

Each is implemented as an independent protocol entity in the access network and the local 
exchange. Each protocol entity communicates with its opposite entity via a single data link,
which is known as a V5 communication path (C-path). Several C-paths may be multiplexed into
a single V5 communication channel (C-channel). Each C-channel terminates in the local 
exchange in an HDLC (high level data link controller); up to four HDLCs can be equipped per
IPTMV52 module. The V5.2 interface can be configured with up to 3 C-channels per link. 
Every C-channel is permanently monitored for its availability by means of flag monitoring.

Channels carrying signalling or control information are protected against 2 Mbit/s link 
failure. In order to provide an automatic failure protection mechanism, the C-channels are 
divided into two protection groups. (protection group 1, protection group 2). 
Each protection group has active C-channels which carry the C-paths and standby C-channels 
used to protect the active C-channels. The active C-channel of the protection group 1 
carries at least the C-paths for the control, the link control, the BCC and the protection 
control. A second C-path for the protection control is located in the standby C-channel of 
the protection group 1. The C-paths for PSTN and ISDN may be located in active C-channels 
of protection group 1 or protection group 2.


