°Û °Û ÞÜ ±Û °Û °Û ÜÛÛ ÛÜ ±Û ²Û°ÛÛÛÛß°Û ÜÜÜ ±Û ÜÜ ÜÛÛÛÜ°ÛßßßÛ°Û °Û ÛÛ ° ÛÛ±Û ±Û ÛÛ ±ÛÛßßßÛܱÛÛßß°ÛÜÜÜß °Û°ÛÛÛ ÛÛ ° ÛÛ±Û ±Û ÛÛ ±Û °Û±Û °ÛÜ °ÜÛßßÛ°Û °Û ßÛ ÛÛß °ÛÛÛ ßÛÛÜ°ÛßÛÛÛÛß±Û °ÛÛÛß°ÛÜÜÛ²°Û °Û Outbreak Magazine Issue #10 - Article 12 of 18 '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' Digital Multiplexing System By Adeamis Dms was made by the northern telecom in 1979 and can be interfaced with the listed switches 1.ESS 1-4 2.Xbar 3.TSPS 4.EAX The dms was made to be small to have room for other installations LCM line concentrating module MDF main distribution frame DMS are in the Class5 Switching DMS 100 integrates voice and data in a total business communications system and up to 30,000 lines DMS-10 for up to 10,800 lines mostly connected with big brother dms 100 or 200 switch DMS 200 access's 60,000 trunks also serve a AT access tandem function can also control controls Operater-assisted calls DMS 250 not often used The Phukin Functions Call Waiting Lamp Loop Keys - There are 6 loop keys, each with its associated source and destination lamp to indicate the calling and called party states. Alphanumeric Display Multiple Directory Numbers Feature Keys - Up to a total of 42. Some of them could be used for Speed Calling and Paging System. Incoming Call Identifier Exclude Source/Exclude Destination - privacy keys Signal Source/Signal Destination: Release Source/Release Destination Console Access to paging Call hold Call detail entry Remote console Call Selection Console display Camp-on Automatic recall Conference - 6 port Two-way splitting Non-delayed operation Attendant transfer Locked loop operation Busy verification of lines Manual and automatic hold Multiple console operation Busy verification of trunks Switched loop operation Trunk g roup busy indication Uniform call distribution form queue Multiple listed directory numbers Control of trunk group access Secrecy Night service Serial call Speed calling Lockout Delayed operation Position busy Interposition calling Through dialing Dms allows BUSINESS's to have LCD Indicators Call Forwarding Automatic Line Call Pick-up Ring Again - automatically redials busy numbers until they are free Multiple Directory Numbers Intercom Speed Call Call Transfer/Conference On-Hook Dialing Programmable Functions Automatic Hold Listen-on Hold Multiple Appearance Directory Numbers (MADN) Single Call Arrangement Multiple Call Arrangement Privacy Release Tone Ringing with Volume Control End-to-End Signaling Call Park Make Set Busy Malicious Call Trace Busy Override Attendant Recall Call Waiting Stored Number Redial Private Business Line 32 Character Alphanumeric Display wich as you can see most of that shit they use everywhere so dms are very popuLAR DMS is remote switching with a bunch of remote modules in a bunch of sizes and capabilities including SXS replacement or growth and Office feature's. The use of remote modules give the CO more floor space that would usually be used by the Line Concentrating Modules Trunk Module (TM) The Trunk Module - changes incoming speech into digital format, it has the ability to handle 30 analog trunks. The Pulse Code Modulation (PCM) information is combined with the trunks supervisory and control signals then transmitted at 2.56 Mb/s over speech links to the network not just with landlines. The TM also uses service circuits such as Multifrequency (MF) receivers, announcement trunks, and test circuits. Each TM has the ability to interface 30 analog trunks or service circuits to the network over one 32-channel speech link. The TM is not traffic sensitive so each trunk can carry 36 CCS. Digital Carrier Module The Digital Carrier Module (DCM) is a digital interface between the DMS switch and the DS-1 digital carrier. The DS-1 signal consists of 24 voice channels. The DCM takes out and puts in signaling and control information on the DS-1 bit streams which then makes them DS-30 32-channel speech links. The DCM can interface five DS-1 lines; 5*24=120 voice channels; into four 32- channel speech links. The DCM can carry a maximum of 36 CCS of traffic on each trunk. Line Module The Line Module (LM) gives an interface for a maximum of 640 analog lines and condenses the voice and signaling into two, three, or four DS-30, 32-channel speech links. Four speech links have the ability to handle 3,700 Average Busy Season Busy Hour (ABSBH) CCS per LM. Operator Features With the use of DMS-200 or DMS 100/200 switch, operator features are available by the following: Traffic Operator Position System (TOPS) Operator Centralization (OC) Auxiliary Operator Service System (AOSS) Traffic Operator Position System (TOPS) gives many operator function on inward and outward calls. The TOPS integrates the operator system with the DMS-200 or DMS-100/200 toll switch. One voice and one data circuit are needed for each operator position. The voice circuit is connected to a port of a three-port conference circuit. The other two ports are connected to the calling and called parties. The data circuit is used for a digital modem and is used to transmit data punched in by the operator to the CCC for processing. Operator Centralization Operator Centralization (OC) lets the operator use the services given by the DMS-200 or DMS-100/200 with TOPS. With OC operator traffic from surrounding DMS sites can be routed to a central host site. Operator Centralization Diagram Routing - - - <-----\ DMS-200 | AMA | \ Remote TC / - - - = = = = = = = / | \ ----- ___|_/ | \: DMS : | | : 200 : | Host TC ----- | : : | = = = = = = = = /| POS | | : (OC:___| | --------- | / |- - -| | : : |\ | : DMS-200 : | / |Oper.| | -----\ | \ | : (TOPS) :__|_/ ----- = = = = = = = \____________|__: : | Trib Ope Traffic->\ ____________|__:OC) : | \ / | : : | Non-DMS Remote TC / | --------- | = = = = = = = = = = = = = = = = = = = | -------- ----- | | : TDM : : (OC: | | : Switch : : : | ----- | : : : DMS :_|_____: AMA : | : : : 200 : | ----- | /-------- -----\ | = = = = = = = = = = = /Routing \ <-Trib Opr Traffic \-------> \ Equal Access Equal Access (EA) is accessible through DMS switches with the addition of software packages. Both Equal Access End Office (EAEO) for the DMS-100 and Access Tandem (AT) for the DMS-200 provide equal access features. Equal Access Network Application --------- __________________________________ (Phone)--------| DMS-100 |___________ | --------- | | NON-EAEO | |IC/INC -------- -------- /---------\ TO (Phone)---| |------------| DMS-200 |------------ ---- IC/INC -------- --------- \---------/ /-----> | | --------- ___________| | (Phone)--------| DMS-100 |__________________________________| --------- DMS-100 EAEO The DMS-100 EAEO gives direct access to interLATA (Local Access and Transport Area) carriers Point of Presence (POP) inside the LATA. The DMS-200 AT gives a traffic concentration and distribution function for interLATA traffic originating or terminating inside a LATA. It allows the following: 10XXX and 950-1XXX dialing presubscription dialing equal access and normal network control signaling Automatic Number Identification (ANI) on all calls custom calling services Common Channel Interoffice Signaling No. 6 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The basis for the CCIS system is the International Consultative Committee on Telephone and Telegraph (CCITT) No. 6 international standard, which is brought to its fullest capacity for use in the Stored Program Control (SPC) network of AT&T. The CCIS6 network contains a bunch of signaling regions, each having a pair of interconnected Signal Transfer Points (STP). The switching systems put into CCIS6 that connect to STPs are called Serving Offices (SO). Band Signaling (CCIS-BS) is used on trunk signaling for intertoll-type trunks using the CCIS network. Direct Signaling (CCIS-DS) is used for signaling between SPC switching machines and a Network Control Point (NCP). At the present time, CCIS6 can handle Enhanced INWATS Originating Screening Office (OSO), Calling Card Validation (CCV), Mechanized Calling Card Service (MCCS), and Billed Number Screening (BNS). CCIS6 is available with DMS-100/200, DMS-200, and DMS-100/200 or DMS-200 with TOPS. CCIS6 Diagram: NSB ST ------------ - - - - - - - - - - - DTC | | | ------- | - - - DS30 | IPML | DS30 | - - - | || | | --------| |------|- - - - - - |------|-| |---| || | | Digital - - - | | | - - - | || | | Trunks | | | | || | | | | | ------- | | | - - - - - - -|- - - - DTC | | TM | DIG - - - DS30 | NUC | DS30 - - - ----- --------| |------|- - - - - - |--------| |----| | ^ - - - |Network | - - - ----- CCIS \ ------------ Modem Signaling \ | - - - ----- AN Links--| | | CCC | - - - ----- Channel Bank Acronyms: DIG - Digital AN - Analog DTC - Digital Trunk Controller MSB - Message Switch Buffer ST - Signaling Terminal TM - Trunk Module NUC - Nailed-Up Connection IPML - Inter-Peripheral Message Link Common Channel Signaling (CCS) No. 7 or CCIS7 is a CCS system based on CCITT No. 7. CCIS7/CCS7 on the DMS switch consists of two parts: the Message Transfer Part (MTP) and the Interim Telephone user Part. They are compatible with DMS-100, DMS-200, DMS-100/200, and DMS-100/DMS-100/200 with TOPS. CCIS7 can't tell the difference between banded and direct signaling. CCIS7 uses Destination/Origination Point Codes (DPC/OPC) to route back to the switch. CCIS7 can handle Automatic Calling Card Service (ACCS), Enhanced INWATS, Local Area Signaling Services, and Direct Service Dialing Capabilities. A DMS-100 IBN or SL-100 can remotely serve many locations from the host site. This is done by a connection through digital transmission facilities which are set up at remote modules at the subscriber's premises. Here are some diagrams showing the differences between normal private telecommunications networks and ESN networks. Normal telecommunications network ----- ------ [Fone]--| SnS | | SL-1 |-[Fone] | PBX | | PBX | ----- ------ | |DOD/DID DOD/DID| | | ------- ------- | |Tie | | Tie| |Trunk --------- Trunk| ------| Class-5 |------ ----| Centrex |---- | --------- | | | | | | | ----- Tie Trunk --------- | SnS | ----------| Class-5 | | PBX | | Centrex | ----- --------- | | | | | | | | ------- ------ [Fone]-| Small | | SL-1 |-[Fone] | PBX | | | ------- ------ ESN Network =========== -------- ---------- [Fone]--| Remote | | SL-1 PBX |--[Fone] | Module | | ESN Main | -------- ---------- | | | DS-1 Facility | DS-1 Facility | -------------- | --------> | Local Class 5| <--------- [Fone]---------| DMS-100 | ----| IBN/ESN |------------- 2W Loop MFIDP | -------------- | ESN Trunk Group or DS-1 | | | or DS-1 | ----- --------------- | | CSC | | Local Class 5 | -------- ----- | DMS-100 | | SL-100 | <--- DS-1 ----> | IBN/ESN | -------- Facility --------------- | | | | | DS-1 Facility | DS-1 Facility | | -------- ---------- [Fone]--| Remote | | SL-1 PBX |--[Fone] | Module | | ESN Main | -------- ---------- Thanks To All The People That Helped To Contribute Any Info You Have On Dms