E-4 Cisco BPX 8600 Series Reference
BNI (BPX Network Interface Card)
The front card used to network BPX switches together and to connect to AXIS shelves, and IPX
and IGX nodes configured as shelves. Supports T-3, E-3, and OC3 trunks carrying ATM cells.
BPX Switch
A high-speed broadband, high-capacity ATM cell relay network switch from for private and
public networks.
BRI (Basic Rate Interface)
ISDN interface composed of two B channels and one D channel for circuit-switched
communication of voice, video, and data. Compare with PRI.
bundled connections
Frame relay connections grouping a number of ports into one permanent virtual circuit.
BTM (Broadband Trunk Module)
The BTM provides an ATM trunk interface for the IGX switch. The BTM operates in conjunction
with a backcard, AIT-T3, or AIT-E3.
BXM
A series of BPX cards, BXM-T3/E3, BXM-155, or BXM-622 which can be configured for either
trunk or line (service access) modes. These cards support ATM Traffic Management 4.0,
including VSVD congestion flow control.
C
CAS (Channel Associated Signalling)
A signalling mode in E1 transmission where the signalling bits for all 30 E1 channels are carried
in timeslot 16. Timeslots 1 to 15 and 17 to 31 carry encoded voice bits only.
CBR (Constant Bit Rate)
ATM Connection type for constant bit rate traffic such as voice or synchronized data requiring a
low variation in delay. (See also, VBR and ABR.)
CCDV (Compliant Cell Delay Variation)
A parameter utilized in defining ATM Constant Bit Rate service. The amount of delay that is
acceptable between ATM cells for them to be accepted as compliant (usable).
CCITT (Consultive Committee for International Telephone and Telegraph)
An international telecommunications advisory committee established under the United Nations
to recommend worldwide standards for data and voice communications.
CCS (Common Channel Signalling)
A carrier signalling mode in E1 transmission where signalling bits are not used. CCS typically
separates user data from signalling information. A signalling channel is used to provide
signalling for all other user data channels in the system.
CDP (Channelized Data PAD)
An IPX dual-purpose front card that can carry voice traffic, a combination of voice and data, or
just data. The CVM card is used in conjunction with a BC-T1, BC-E1, or BC-J1 backcard.
CDVT (Cell Delay Variation Tolerance)
Controls time scale over which the PCR is policed.
