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DEFINITY Switch Connectivity
5
Administration for Network Connectivity
555-233-504 — Issue 1 — April 2000 CID: 77730
1 Networking Overview
C-LAN
The C-LAN circuit pack (TN799B) enables signaling data to be transmitted via the
TCP/IP protocols across a LAN or WAN. Signaling types include call setup and
teardown, registration of IP softphones, TSCs, QSIG and DCS signaling.
The C-LAN circuit pack provides the data link interface between the switch processor
and the transmission facilities. C-LAN prepares the signaling information for TCP/IP
transmission over one of two pathways — either via an Ethernet LAN or a point to
point protocol (PPP) connection — depending on how the data link is administered. If
the link is administered for an ethernet connection, the signaling data is sent out on a
10Base-T network, which is connected directly to the C-LAN ethernet port. If the link
is administered for a PPP connection, C-LAN inserts the signaling data on the TDM
bus for subsequent inclusion (via the switching fabric) in the same DS1 bit stream as
the voice transmissions.
The C-LAN board can be inserted in any available port slot. Up to 10 C-LAN boards
can be used in the DEFINITY ECS R8r and R8si models — up to 2 C-LAN boards
can be used in the R8csi model. Each C-LAN board has 17 ports; port 17 is used for
the LAN interface and the other 16 can be used for PPP connections. Up to 508
sockets are available on each C-LAN circuit pack.
IP-Interface
The IP Interface circuit pack (TN802B) enables two switches to transmit voice data
between them over an IP network. The TN802B normally operates in the MedPro
mode, which enables support of applications that comply with the H.323-v2
protocols. It can also operate in the IP Trunk mode to support R7 IP trunks that
emulate DS1 connections.
Tie-Trunk Circuit Packs
The tie-trunk circuit packs provide an interface between the switch and the
transmission facilities for voice data, call-signaling data and data. See System
Description, 555-230-211 for descriptions of tie-trunk (and other) circuit packs.
Pre-R7 circuit packs PI (si only)
The PRI functionality of the Processor Interface (PI) board (TN765) is replaced by
the NetPkt board (TN794) in R7. The PI board will no longer be shipped with new
systems starting with R7. The PI board is needed in switches upgraded to R7 and later
releases only if existing X.25 connections are retained. The PI board has 4 data links
that can connect to DS1 tie trunks over the TDM bus for interface to DCS or ISDN
applications. The PI board terminates BX.25 and ISDN-PRI link access procedure on
the D-Channel (LAPD).
NETCON (si only)
The network controller (NETCON) board (TN77B) is replaced by the NetPkt board
(TN794) starting in R7. For pre-R7 systems, NETCON provides an interface to the
processor for the port circuit packs on the TDM bus.