Carrier Access Access Bank II SNMP Installation And User Manual Download Page 179

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Access Bankô II, that incorporates a controller, channel service unit (CSU), ringing generator and power
converter on a single card to interface between the T1 network and the analog functions of the channel bank.

PBX (PRIVATE BRANCH EXCHANGE):

PERFORMANCE REPORT MESSAGE (PRM):

PLAR (PRIVATE LINE AUTOMATIC RINGDOWN):

A leased voice circuit that connects two single

telephone handsets together. Whenever either handset is lifted, the other instrument automatically rings.

PSTN (PUBLIC SWITCHED TELEPHONE NETWORK):

As used by the ITU-T, PSTN is simply an

abbreviation for the local phone company

QRSS (QUASI-RANDOM SIGNAL SEQUENCE):

A standard test pattern generated by a 20-bit linear

feedback shift register used during loopback and BER testing to stress test the continuity and integrity of a
T1 circuit by simulating live data traffic. Generates every combination of 20-bit words, repeats every
1,048,575 bits, and suppresses consecutive zeros to no more than 14. Contains high density sequences, low
density sequences, and sequences that change from low density to high density and vice versa.

RING BACK TONE:

An interrupted low tone indicating that the called telephone is ringing. This tone is

generated by a device at the Central Office (CO) and may bear no relationship to the sound the phone at the
other end is emitting - or not emitting.

RING GENERATOR:

A component of virtually all phone systems, including the Access Bankô II, that

supplies the power to ring the bells inside phones, typically 90 volts AC at 20 Hz.

RINGER EQUIVALENCY NUMBER (REN):

Part of the FCC certification number approving a tele-

phone terminal product for direct sale to the end user as not doing harm to the network. The REN consists
of a number and a letter which indicates the frequency response of that telephone’s ringer. The number in-
dicates the quantity of ringers which ma be connected to a single telephone line and still all ring. The total
of RENs of the telephones connected to the one line must not exceed the value 5 or some or all of the ringers
may not operate.

SCADA (SUPERVISORY CONTROL AND DATA ACQUISITION):

SLC



96 (SUBSCRIBER LOOP CARRIER 96):

A short-haul multiplexer manufactured by AT&T

Technologies that enables up to 96 telephone customers to be served on three pairs of wires.

SNMP (SIMPLE NETWORK MANAGEMENT PROTOCOL):

SNMP is an application layer connec-

tion-less protocol, running over UDP (User Datagram Protocol), that functions as TCP’s stack network
management protocol between a management station and a SNMP agent resident in a managed device. For
managing TCP/IP-based networks, SNMP is the

de facto

standard. SNMP is designed to implement an au-

tomated network-management system for controlling and performance monitoring managed devices such
as hosts, bridges, routers, CSU/DSUs, and channel banks in networks and distributed processing systems.

SPAN:

A span is a logical name for an access port into the Access Bank II. A span carries Voice/Data in-

formation to/from the Access Bank.

TIMESLOT:

64Kbyte/s channels on a T1 span. A T1 span contains 24 timeslots.

TRANSMISSION ONLY (TO):

operating mode on a 4-wire E&M card that provides dedicated one-

way transmission paths to radio and modem equipment uncorrupted by the insertion of A/B robbed bit sig-