Overview Application Note 1218 ADC HDSL Compatibility and CSU Power Options ADC offers a wide variety of HDSL modules to fit numerous shelf types such as industry standard 220 style repeater, 3192 style repeater and also ADC’s unique Soneplex system chassis. All chassis styles provide the mechanical interface for conversion from standard DS1 signals to HDSL encoded signals. This HDSL encoded signal is called 2B1Q and provides the capability to transmit DS1 signal information over longer distances without the need for traditional repeaters. This application note serves a dual purpose. First, it addresses the compatibility between current and past versions of ADC’s HDSL product for all three chassis types. Second, the CSU powering options are defined for ADC’s HDSL remote end products. ® 2 HDSL Compatibility and CSU Power Options Application Note 1218 Figure 2 Modules compatible with the HDSL repeater ADC continuously strives to enhance its products by improving features. The HDSL product line is no exception. The many advances made since the product’s inception have led to multiple options for deployment. Figure 1 details all released HDSL module versions and their compatibility to other modules. Figure 2 indicates which modules are compatible with the HDSL repeater. As shown in Figure 1, many remote modules are compatible with central office modules. Note that when an older version module communicates with a newer version, some capabilities may be limited. These limitations include: • HLXC C1 to HLXR D(X) – Monitor only at HLXR craft port; no HDSL repeater support • HLXC D1 to HLXR B1– No HDSL repeater support • HLXC B1 220/3192 to HLXR B1– No HDSL repeater support HDSL Compatibility Figure 1 Released HDSL module versions and their compatibility to other modules SONEPLEX CHASSIS 220 CHASSIS 3192 CHASSIS CENTRAL OFFICE REMOTE SITE SPAN POWERED ONLY 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) SPAN POWERED ONLY NO 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) SPAN POWERED ONLY 60 mA SIMPLEX DS1 IDLE SIGNAL LOCAL OR SPAN POWERED 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) HLXC 220 B1 HLXC D1 HLXC 319 B1 HRX COMPATIBLECOMPATIBLE HLXR D1 HLXR D2 HLXR D3 HLXR D4 SONEPLEX CHASSIS SONEPLEX CHASSIS SONEPLEX CHASSIS 220 CHASSIS 220 CHASSIS 3192 CHASSIS 3192 CHASSIS CENTRAL OFFICE COMPATIBLE COMPATIBLE HLXC B1 OR C1 HLXC A1 HLXC 220 A1 HLXC 319 A1 HLXC D1 HLXC 220 B1 HLXC 319 B1 REMOTE SITE HLXR B1 HLXR A1 HLXR D1 HLXR D2 HLXR D3 HLXR D4 SPAN POWERED ONLY 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) SPAN POWERED ONLY 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) SPAN POWERED ONLY NO 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) SPAN POWERED ONLY 60 mA SIMPLEX DS1 IDLE SIGNAL LOCAL OR SPAN POWERED 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) LOCAL OR SPAN POWERED 60 mA SIMPLEX (NO DS1 IDLE SIGNAL) 3 HDSL Compatibility and CSU Power Options Application Note 1218 CSU Power Options Powering a customer premises device such as a channel serving unit (CSU) or network interface device (NID) using a local power supply may not be practical or possible in some circumstances. ADC’s HDSL modules offer an alternative powering mechanism called simplex power which provides power to the NID/CSU device from the remote HDSL module. Simplex power is provided on the DS1 transmit and receive pairs and consists of a constant 60 mA current source. It is important to note that simplex power does not modify the transmission data in any way. Table 1 indicates which HDSL remote modules have the ability to provide simplex power and the associated specifications. MODULE 1.4 Watts (Max 24V) 60 mA Simplex 4 Watts (Max 67V) HLXR A1 HLXR B1 HLXR D1 HLXR D2 HLXR D3 HLXR D4 NO NO Table 1 Feature Considerations Previous versions of the remote HDSL (HLXR) modules varied slightly in the way simplex power was provisioned. The differences are as follows: A1 version HLXR (SPX-HLXRA1) required the placement of a wire strap across two pins on the chassis in order to provide 60 mA simplex power. Simplex is always enabled while the strap is in place. B1 version HLXR (SPX-HLXRB1) required the placement of a wire strap across two pins on the chassis in order to provide 60 mA simplex power. Simplex is always enabled while the strap is in place. D1, D2, D3* version HLXR (SPX-HLXRD[X]) modules provide simplex power on initial power up if wire strap is present on chassis. The wire strap can be ignored if software provisioning is preferred. Simplex power can be enabled or disabled through software. This feature allows easy migration to D(X) modules in existing chassis configurations. Wire strap is not required when D version modules are present at both locations. It is important to note that the D1 HDSL central office module (HLXC) supports the use of an optional HDSL repeater shown in Figure 2. This optional HDSL repeater is used to effectively double the distance between the central office module and the remote module. Soneplex HDSL applications with D version modules at both ends must have a version 5 MPU present in the central office chassis in order to utilize the full feature capability (HDSL repeater and full remote craft functionality). If an MPU is desired with Soneplex B1/C1 HDSL module applications, a 3.1 or higher version MPU is required. *As previously indicated in Table 1, D4 version HLXR modules do not provide simplex power. Application Note 1218 9/95 Original © 1994 ADC Telecommunications, Inc. All Rights Reserved An Equal Opportunity Employer Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters office in Minneapolis. ADC Telecommunications, Inc. 4900 West 78th Street Minneapolis, Minnesota 55435 FAX: (612) 946-3292 For U.S. Sales, Call Toll Free: 1-800-366-3891 International Sales Offices: Belgium 32-2-721-5282 • United Kingdom 44-734-441955 • Montreal, Quebec (514) 677-9166 • Vancouver, BC (604) 270-1675 • Toronto, Ont. (905) 629-3104 • Ottawa, Ont. (613) 723-2171 • Singapore 65-225-8228 • Venezuela 58-2-953-1684 • Mexico City, Mexico 525-658-4519 • Sydney, Australia 61-2-975-1499 . SIGNAL) 3 HDSL Compatibility and CSU Power Options Application Note 1218 CSU Power Options Powering a customer premises device such as a channel serving unit (CSU) . Note 1218 ADC HDSL Compatibility and CSU Power Options ADC offers a wide variety of HDSL modules to fit numerous shelf types such as industry standard 220