ADM (Add and Drop Multiplexer) 2P

THE ADM 2P (ADD AND DROP MULTIPLEXER WITH 2 MODULAR PORTS) IS PART OF THE UNIVERSAL CROCUS ACCESS SOLUTION AND OFFERS A FLEXIBLE AND MODULAR APPROACH FOR INTERFACE CONVERSION AND TIME DIVISION MULTIPLEXING (TDM).

The unit is equipped with 2 fixed (F)E1 G.703 interfaces and 2 slots for user selectable plug-in interfaces. The main application for the equipment is the use as a dual port Nx64k multiplexer with (F)E1 G.703 output and an additional add-and-drop FE1 G.703 interface (figure 1). This add-and-drop interface can be used for stacking the cards and creating a multiplexer with an arbitrary number of Nx64k input ports.

Because the core of the equipment supports full cross-connect functionality, rather than only multiplexing, it is also possible to use the equipment as interface converter (Figure 2 and 3) or as a time slot re-organiser, when used between the fixed G.703 interfaces.

The equipment comes as a card for mounting into the CN4 range of cardnests. Depending on the selected cardnest, a rackmount or desktop solution can be created.

Features and Benefits

Modular stackable Nx64k multiplexer
G.703 (F)E1 output and add-and-drop interface
Nx64k field-exchangeable serial or 10/100 BaseT interfaces

ADM 2P - Specifications

Fixed G.703 E1 interfaces
• User speed: (F)E1	• Connector: 120 ohm balanced RJ45 connector 120 ohm balanced terminal block connector
Modular interfaces
• Datamode: DCE • Available modular serial interfaces: V.35, V.36, X.21, RS-530, RS-232, G.703/G.704	• Available modular Ethernet interfaces: IP router 2M, IP router 10M • User speeds: Nx64 kbps (N=1..32)
Fixed G.703 E1 interface characteristics
• Applicable standards: ITU-T G.703, G.704, G.736, G.732, I.431,CRC-4 insertion • Jitter performance: ITU-T G.823 • Nominal line data rate: 2048 kbps • Transmit level: 0dBm	• Receiver sensitivity: -15 dBm (short haul mode) -36 dBm (long haul mode) • Line code: HDB3 AMI (short haul mode only) • Performance monitoring: G.704 CRC-4 (configurable) • The two G.703 interfaces are automatically interconnected on power fail or self-test failure
Management interface
• Synchronous High speed bus: RJ45 on CN4 card nest • Console port: 9600 bps, asynchronous, 8N1, SubD 9-pin ATWIN, TMA, CLI • Alarm contacts: Major, minor (See CN4)	• Flash memory • Password protected • Insertion/extraction of management channel in G.703 time-slot 0
Internal cross-connect functionality
• Non-blocking • Any arbitrary combination of 64k time-slots	• Compliant with ETSI ETS 300 010-1 and ETS 300 010-A
Station clock interface (on card nest CN4)
• Nominal rate: 2048 kbps • Line code: HDB3	• Line connection: 120 ohm balanced RJ45 connector
Clocking schemes
• External transmit clock (station clock) • Transmit clock slaved on E1 receive clock from ports 1…2	• Internal transmit clock • Fallback to other clock source in case of absence
Mechanical Data (HxWxD)
• 25 x 335 x 262 mm
Power
• 48Vdc or 230Vac, 7.2W max

Stackable TDM multiplxer (2 cards stacked)

Nx64k interface converter

G.703 time-slot re-organiser