Cisco Coaxial Media Converter for Remote-PHY Data Sheet
Available Languages
Deploy DOCSIS over digital fiber while maintaining feature parity with existing cable modem termination systems (CMTS). That’s the advantage of Remote-PHY. As an important part of Remote-PHY, the Cisco® Coaxial Media Converter (CMC) is a CableLabs® DOCSIS® 3.0 and C-DOCSIS/Remote-PHY standard-compliant Remote PHY device that supports RF functions at the physical layer. Additionally, the system control, classification and forwarding, and MAC functionality are still retained in the CMTS core (the Cisco uBR10012 Universal Broadband Router configured with Cisco uBR-MC3GX60V-RPHY Broadband Processing Engine).
The Cisco CMC (Figure 1) converts data between the coaxial cable network and the passive optical network (PON) or the Metro Ethernet network. The Cisco CMC connects to the cable modem through the CATV coaxial cable network and to an aggregation network through the PON or the Metro Ethernet network in the upstream direction.
Remote-PHY System Architecture
The Cisco Remote-PHY system consists of the DOCSIS CMTS core, the Cisco CMC, cable modem, and supporting system. It handles broadband data and digital video access and forwarding, service configuration, and management and maintenance of CATV coaxial cable networks. The Modular Headend Architecture version 2 (MHAv2) is a set of open protocol standard recommendations specifically designed for Remote-PHY.
The Modular Headend Architecture (MHA) is a CableLabs specification for a M-CMTS architecture that differs from the integrated CMTS (I-CMTS) architecture, which has PHYs internal to CMTS. The MHA includes DOCSIS External Downstream Interface (DEPI), DOCSIS Timing Interface (DTI), Operations Support System Interface (OSSI), and video-related specifications. MHAv2 is the extension of MHA, a new Layer 2 Tunneling Protocol Version 3 (L2TPv3)-based protocol Upstream External PHY Interface (UEPI) is defined for upstream DOCSIS MAC management and data packets encapsulation. It supports the combination of DEPI and UEPI in the remote side, hence is also called DOCSIS Remote PHY. General Control Plane (GCP) protocol is also introduced as the general control plane protocol used to start, run, and configure the CMC.
In the MHAv2 architecture, both downstream PHY and upstream PHY are deployed on the remote side, which is called CMC. Please note that the CMC has to work with the Cisco uBR-MC3GX60V-RPHY BPE line card that has the same functionality as the existing Cisco uBR-MC3GX60V except for the RF and PHY-related features. The CMC has both radio frequency interference (RFI) and Gigabit Ethernet (GigE) interfaces while the line card only has GigE interfaces for both upstream and downstream.
DEPI is based on L2TPv3 and is the downstream link between the downstream MAC and remote downstream PHY, which is inherited from MHA and contains the forwarding plane protocol. UEPI is also based on the L2TPv3 and is the upstream link between upstream MAC and upstream PHY.
In the MHAv2 architecture, the CMC and the digital fiber network are transparent to cable modems. The CMC is managed in the CMTS core with GCP. The cable modem and provisioning system do not change. With this approach, Cisco CMC for Remote-PHY has some of the least complicated electronics in the cable field, providing better reliability and lower cost.
The MHAv2 with DEPI and UEPI has been adopted by CableLabs and the China State Administration of Radio, Film, and Television (SARFT) for inclusion in the China DOCSIS (C-DOCSIS) specification.
Remote-PHY System Key Features and Benefits
● Preserves the centralized software structure of the CMTS and rich feature sets. Allows for future software upgrades without requiring upgrades of the numerous remote nodes in the field.
● Requires a small amount of hardware and software in the remote node to keep the device relatively simple and stable. This provides many operational advantages. There is less troubleshooting required. The simpler the hardware, the less chance of failure, simplifying normal operations. Additionally, most of the intelligent software resides in the CMTS in the headend, making it easier for customers to deploy upgrades as new features and capabilities evolve. Instead of upgrading thousands of nodes in the field, upgrades are deployed centrally in the headend.
● Supports Ethernet-based network such as Ethernet Passive Optical Network (EPON), Gigabit Passive Optical Network (GPON) and Layer 2 Metro Ethernet. This gives customers the flexibility to cost-effectively select which transmission network is most appropriate to their needs.
● Preserves the sophisticated DOCSIS quality of service (QoS) assurance mechanism to help ensure end-to-end QoS. The granularity of scheduling is per service flow-based. In addition, there is no mapping needed from the DOCSIS service flow to the Ethernet packet virtual LAN (VLAN).
● The CMC and transmission network are transparent to the CMTS and cable modem so the Remote-PHY has no effect on the existing CMTS and cable modem. Instead, the architecture allows the use of digital Fiber.
Features List
● DOCSIS3.0 and Euro-DOCSIS3.0 compliant
● C-DOCSIS and Remote-PHY Standard compliant
● Support up to 16 Downstream channels and up to 4 Upstream channels
● Support 60VAC Line power or 220VAC Main Power
● Support Forward Optical Receiver (one way fiber node) that is customer selectable
● Support EPON/GPON SFP ONU
● Input: 1x RF input, 1 Fiber input for CATV video, 1+1 redundant GE RJ45 for external PON ONU connection or 1+1 redundant SFP GE fiber input or 1 Fiber input for internal PON SFP ONU connection.
● Max Output:
◦ 4x RF out, QAM RF output =45dBmV (16 channels)/60dBmV(1 channel), CATV output = 50dBmV
◦ 2x RF out, QAM RF output =49dBmV (16 channels)/64dBmV(1 channel), CATV output = 54dBmV
(by using jumpers to replace splitters, 4 RF ports CMC can be converted to 2 RF ports CMC)
● 42/54 or 65/87MHZ split
● Operating temperature: -40°C ~55°C
● Waterproof: IP67
● Max AC through current (continuous): 15A
● Surge-resistant circuitry ensures resistance to high voltage transients (6kV for 60V CMC, 4kV for 220V CMC)
● Standard DOCSIS service flow based end to end QoS
● No need for mapping of service flow to PON VLANS that reduces the end to end system to DOCSIS 1.0 Class of Service operation
● Standard Dynamic QoS, Standard packet cable and packet cable multimedia
● From 4-channel to 16-channel downstream bonding capable; 4-channel upstream bonding capable
● 2 Small Form-Factor Pluggable (SFP) ports which can be configured as 1+1 redundancy
● Full DOCSIS 3.0 CMTS and downstream external PHY interface (DEPI) capability
● Full DOCSIS 3.0 CMTS and upstream external PHY interface (UEPI) capability
● Full DOCSIS 3.0 CMTS and General control plane protocol (GCP) capability
● Superior RF performance with enhanced full-feature tap (FFT), ingress cancellation, and impulse noise detection capability
● Time Division Multiple Access (TDMA), Advanced Time Division Multiple Access (A-TDMA)
● One CMC controller (Cisco uBR-MC3GX60V-RPHY) provides a single point of management for many CMCs
● Support DOCSIS 2.0, 3.0 modems
● CLI based commands to manage both the CMTS and CMC
Product Specifications
Table 1. CMC Product Specifications
Table 2. Forward Optical Receiver Module Section Specifications
| Item |
Value |
| Optical Section Specifications |
|
| Wavelength |
1200 to 1610 nm |
| Optical Input Range |
-8 to +2 dBm |
| Optical AGC Range |
-6 to 0 dBm |
| Optical AGC Control Stability |
±1.5 dB |
| Optical Connector |
SC/APC |
| Equivalent Input Noise |
≤ 6 pA/ |
| RF Output Level @ -6 dBm Optical Input |
Refer to chart below (dBmV) (AGC Off) |
| Frequency Range |
52-1002 MHz |
| RF Reference output levels1 |
|
| 1002MHZ |
50.0 dBmV |
| 870MHz |
48.4 dBmV |
| 750MHz |
47.5 dBmV |
| 650MHz |
46.7 dBmV |
| 550MHz |
45.8 dBmV |
| 87MHz |
41.6 dBmV |
| 52MHz |
41.0 dBmV |
| Default tilt (±1.0 dB) |
9 dB |
| Frequency Response |
±0.75 dB |
| Output Return Loss |
≥ 16 dB |
| Forward tilt range |
3 to 15 dB, 1 dB step |
| Forward Attenuator |
0 to -6dB, 1 dB step |
| Distortion @ 78 NTSC + Digitial2 CTB CSO XMOD |
Typical 68 dB 65 dB 60 dB |
| Distortion @ 59 PAL B/G + Digital2 CTB CSO |
Typical 70 dB 67 dB |
| Distortion @ 59 PAL D/K + Digital2 CTB CSO |
Typical 70 dB 67 dB |
| Distortion @ 42 CENELEC2 CTB CSO |
Typical 65 dB 62 dB |
| Notes: 1. RF Output Levels are referenced to an Optical Input Level at 1310 nm at 3.25% OMI 2. Distortion performance reference output level is 50 dBmV with default 9dB tilt. QAM carrier is -6 dB relative to analog CW carrier level |
|
Table 3. Cisco CMC Forward RF Section Specifications (Cisco CMC with Forward Optical Receiver Integrated)
| Item |
Value |
| Optical Section Specifications |
|
| Wavelength |
1200 to 1610 nm |
| Optical Input Range |
-8 to +2 dBm |
| Optical AGC Range |
-6 to 0 dBm |
| Optical AGC Control Stability |
±1.5 dB |
| Optical Connector |
SC/APC |
| Equivalent Input Noise |
≤ 6 pA/ |
| Forward RF Section Specifications |
|
| Frequency Range |
54-1002MHz 87-1002 MHz |
| RF Reference output levels |
|
| 1002MHZ |
50.0 dBmV |
| 870MHz |
48.4 dBmV |
| 750MHz |
47.5 dBmV |
| 650MHz |
46.7 dBmV |
| 550MHz |
45.8 dBmV |
| 87MHz |
41.6 dBmV |
| 54MHz |
41.02 dBmV |
| Forward tilt range in FRX |
3~15 dB, 1dB step |
| Tilt Range in Cisco CMC RF Section |
0~12 dB, 1.5dB step |
| Cisco CMC Flatness with Tilt |
±1.0 dB (87MHz~1GHz) @ 65/87 Diplexer ±1.5 dB (54MHz~1GHz) @ 42/54 Diplexer |
| Output Return Loss |
≥ 16 dB (54/87-550 MHz) ≥ 14 dB (550-1002 MHz) |
| Distortion @ 78 NTSC + Digitial1,2 CTB CSO |
Typical 67dB 64 dB |
| Distortion @ 59 PAL B/G + Digital1,2 CTB CSO |
Typical 68 dB 66 dB |
| Distortion @ 59 PAL D/K + Digital1,2 CTB CSO |
Typical 68 dB 66 dB |
| Distortion @ 42 CENELEC1,2 CTB CSO |
Typical 63 dB 60 dB |
| Notes: 1. Forward performance is from optical receiver to RF output port with default setting (0 dB pad, 0 dB linear EQ and Splitter). 2. Distortion performance reference output level is 50 dBmV with default 9dB tilt. QAM carrier is -6 dB relative to analog CW carrier level. 3. RF Output Levels are referenced to an Optical Input Level at 1310 nm at 3.25% OMI. |
|
Table 4. Cisco CMC Forward RF Section Specifications (Cisco CMC without Forward Optical Receiver Integrated)
| Item |
Value |
| Forward RF Section Specifications |
|
| Frequency Range |
54/87-1002 MHz |
| Cisco CMC Flatness with Tilt |
±1.0 dB (87MHz~1GHz) @ 65/87 Diplexer ±1.25 dB (54MHz~1GHz) @ 42/54 Diplexer |
| Gain @1002MHz |
-2.5dB (w/Splitter) 1.5dB (w/Jumper) |
| Output Return Loss |
≥ 16 dB (54/87-550 MHz) ≥ 14 dB (550-1002 MHz) |
| Default CATV output tilt |
0dB |
| Distortion @ 78 NTSC + Digitial1,2 CTB CSO |
Typical 68 dB 65 dB |
| Distortion @ 59 PAL B/GK + Digital1,2 CTB CSO |
Typical 70 dB 67 dB |
| Distortion @ 59 PAL D/K + Digital1,2 CTB CSO |
Typical 70 dB 67 dB |
| Distortion @ 42 CENELEC1,2 CTB CSO |
Typical 66 dB 64 dB |
| HUM Modulation 8A AC current feeding into RF/AC port 15A AC current feeding into RF/AC port |
-65.0 dBc (Typical) between 87 - -60.0 dBc (Typical) between 87 - 862MHZ -55.0 dBc (Typical) between 862 - 1002 MHZ |
| Notes: 1. Forward performance is from CATV IN to RF output port with default setting (0 dB pad, 0 dB linear EQ and Splitter). 2. Distortion performance reference output level is 50 dBmV with default 9dB tilt. QAM carrier is -6 dB relative to analog CW carrier level. |
|
Table 5. Powering Data (220VAC CMC with FRX)
| Powering Data (220VAC) |
|
|||||||||
| AC input Voltage (V) |
85 |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
160 |
|
| AC input Current (A) |
1.06 |
1.00 |
0.89 |
0.81 |
0.74 |
0.68 |
0.63 |
0.59 |
0.55 |
|
| AC input Power (W) |
90.1 |
89.6 |
88.9 |
88.5 |
88.2 |
87.9 |
87.8 |
87.5 |
87.5 |
|
| 170 |
180 |
190 |
200 |
210 |
220 |
230 |
240 |
250 |
260 |
264 |
| 0.53 |
0.50 |
0.47 |
0.45 |
0.43 |
0.41 |
0.40 |
0.38 |
0.37 |
0.36 |
0.35 |
| 87.34 |
87.34 |
87.34 |
87.34 |
87.34 |
87.34 |
87.24 |
87.24 |
87.14 |
86.83 |
86.01 |
Table 6. Powering Data (60VAC CMC with FRX)
| Powering Data (60VAC) |
||||||||
| AC input Voltage (V) |
25 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
| AC input Current (A) |
3.99 |
3.25 |
2.41 |
1.90 |
1.57 |
1.35 |
1.19 |
1.07 |
| AC input Power (W) |
99.75 |
97.50 |
94.97 |
93.83 |
92.91 |
92.49 |
92.08 |
91.77 |
Warranty Information
Warranty information is available on Cisco.com at the Product Warranties page.
Ordering Information
Table 7 provides ordering information. To place an order, visit the Cisco Ordering Home Page. To download software, visit the Cisco Software Center.
The Cisco Coaxial Media Converter for Remote-PHY is available in a wide variety of configurations. This page
also contains ordering information for required and optional accessories. Consult your Customer Service Representative or Applications Engineer to determine the best configuration for your particular application.
Table 7. Ordering Information
| Product Description |
Part Number |
| Cisco Coaxial Media Converter (CMC) |
|
| RPHY CMC, 60V, 6DS 4US Ch, 42/54MHZ |
CMC-L-L-16X4 |
| RPHY CMC, 60V, 16DS 4US Ch, 65/87MHZ |
CMC-L-M-16x4 |
| RPHY CMC, 60V, 16DS 4US Ch, 42/54MHZ, w/Node |
CMC-L-L-16X4-N |
| RPHY CMC, 60V, 16DS 4US Ch, 65/87MHZ, w/Node |
CMC-L-M-16x4-N |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54MHZ, US PowCord |
CMC-M-L-16X4-US |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54MHZ, JP PowCord |
CMC-M-L-16X4-JP |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54MHZ, EU PowCord |
CMC-M-L-16X4-EU |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54MHZ, UK PowCord |
CMC-M-L-16X4-UK |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54MHZ, India PowCord |
CMC-M-L-16X4-ID |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, CH PowCord |
CMC-M-M-16x4-CH |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, JP PowCord |
CMC-M-M-16x4-JP |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, US PowCord |
CMC-M-M-16x4-US |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, EU PowCord |
CMC-M-M-16x4-EU |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, UK PowCord |
CMC-M-M-16x4-UK |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87MHZ, AU PowCord |
CMC-M-M-16x4-AU |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54, US PowCord, w/Node |
CMC-M-L-16X4-USN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54, EU PowCord, w/Node |
CMC-M-L-16X4-EUN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54, JP PowCord, w/Node |
CMC-M-L-16X4-JPN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54, UK PowCord, w/Node |
CMC-M-L-16X4-UKN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 42/54, ID PowCord, w/Node |
CMC-M-L-16X4-IDN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, CH PowCord, w/Node |
CMC-M-M-16x4-CHN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, JP PowCord, w/Node |
CMC-M-M-16x4-JPN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, US PowCord, w/Node |
CMC-M-M-16x4-USN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, EU PowCord, w/Node |
CMC-M-M-16x4-EUN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, UK PowCord, w/Node |
CMC-M-M-16x4-UKN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, AU PowCord, w/Node |
CMC-M-M-16x4-AUN |
| RPHY CMC, 110/220V, 16DS 4US Ch, 65/87, ID PowCord, w/Node |
CMC-M-M-16x4-IDN |
| Accessory For CMC |
|
| CABLE GLAND FOR RJ45, PG16, 1 HOLE |
GLND-PG16-RJ-1H= |
| CABLE GLAND FOR RJ45, PG16, 2 HOLES |
GLND-PG16-RJ-2H= |
| PLUG W/ O-RING 5/8" BRASS NICKEL PLATE |
PLUG-CMC-RF= |
| ASSY, F-CONN, 5/8", METRIC |
FCONNTOR-CMC-M= |
| ASSY, F-CONN, 5/8, STND |
FCONNTOR-CMC-S= |
| GS7000 Node Signal Director Spltr (Kit/10) |
4011908 |
| GS7000 Node Signal Director Jmpr (Kit/10) |
|
| Cisco CMC Console cable, converter between DB9 and PCB |
CAB-CONSOLE-DB9= |
| Optical Adapter For SC/APC to SC/APC |
OPT-ADP-SC-SC= |
| Optical Adapter For SC/APC to FC/APC |
OPT-ADP-SC-FC= |
| SFP Optics For Cisco CMC |
|
| 1000Mbps Multi-Mode Rugged SFP |
GLC-SX-MM-RGD |
| 1000Mbps Single Mode Rugged SFP |
GLC-LX-SM-RGD |
| Cisco 1000BASE-ZX Single Mode Rugged SFP |
GLC-ZX-SM-RGD |
| 1000BASE-BX SFP, 1310NM² |
GLC-BX-U |
| 1000BASE-EX SFP transceiver module, SMF, 1310nm, DOM² |
GLC-EX-SMD |
| Note: 1. The type of SFP need to be selected based on application and environmental conditions. Check SFP datasheets for more detailed information. 2. SFP has a less wide temperature range as CMC. SFP will define the lowest temperature the CMC can operate in. |
|
Table 8. Required Accessories
| Required Accessories |
Part Number |
| Plug-in Pads (attenuators) - Available in 0.5 dB steps from 0 to 20 dB
● 2 required for Forward
● 3 required for Reverse (2 input, 1 output)
Above five 0 dB value pads are pre-installed in the CMC, customer can purchase different value pads separately if those default values do not fit the system design requirements. |
589693 (0 dB) sequentially thru 589734 (20.5 dB) |
| Plug-in Forward Linear Equalizer - Available in 1.5 dB steps from 0 to 30 dB at 1002 MHz
● 2 required for Forward
Above two 0 dB value EQs are pre-installed in the CMC, A customer can purchase different value EQs separately if these default values do not fit the system design requirements. |
Please refer to GainMaker Forward Linear Equalizer list |
Table 9. Optional Accessories
| Optional Accessories |
Part Number |
| Signal Director- two way splitter
● 2 required for CMC with 4 RF output ports
Two splitters are pre-installed in the CMC to enable 4 output ports. Signal Director- Jumper
● 2 required for CMC with 2 RF output ports
A customer can purchase jumpers separately to replace splitters to make the CMC a 2 port CMC. If jumpers are used, port plugs also need to be ordered to terminate the unused RF ports. |
4011908 4011907 |
| Console cable The customer should purchase the console cable separately |
CAB-CONSOLE-DB9= |
| Port Plug with O-Ring, 5/8”
● 3 required for 60V CMC to terminate unused ports (Power port and two fiber ports)
● 2 required for 220V CMC to terminate unused ports (Two fiber ports)
Above port plugs are pre-installed on CMC and they can be easily removed in the field by using a wrench. Customer can purchase more to terminate unused ports. |
PLUG-CMC-RF= |
| Cable Gland for RJ45 port Customer needs to order cable gland separately for external ONU connection. |
GLND-PG16-RJ-1H= GLND-PG16-RJ-2H= |
| SC/APC - SC/APC Adaptor Two adaptors are pre-installed in the CMC for fiber connectivity. Customer can purchase more if needed. |
OPT-ADP-SC-SC= |
| SC/APC - FC/APC Adaptor Customer can purchase this adaptor separately |
OPT-ADP-SC-FC= |
| F-connector |
FCONNTOR-CMC-M= FCONNTOR-CMC-S= |
Notes on configuration:
1. With regard to Pads, Forward Cable Equalizer, Forward Linear Equalizer and Inverse Equalizer, Cisco CMC will use the same parts of Cisco Gainmaker products.
2. FRX field installation is not recommended given the operation complexity and lack of calibration in the field, hence the performance is not guaranteed. If have to be done, must be performed by experienced engineer and follow the instruction.
3. Shunt will be used for CMC with line power (60V CMC). By installing AC shunts for the ports that you want to pass AC power, you can configure power direction based on field requirement. CMC re-uses the same shunt from GainMaker/GS7000 ndes. There are 5 pcs shunts (1 pcs shunt in red color for RF input port and 4 pcs shunts in black color for RF output ports) assembled in a bag that by default shipped with 60V CMC.
4. When using F-Connector together with remote powering option please make sure that the chosen F-Connector is capable of safely passing the desired remote power current.
Cisco Services
Cisco Services make networks, applications, and the people who use them work better together.
Today, the network is a strategic platform in a world that demands better integration between people, information, and ideas. The network works better when services, together with products, create solutions aligned with business needs and opportunities. The unique Cisco lifecycle approach to services defines the requisite activities at each phase of the network lifecycle to help ensure service excellence. With a collaborative delivery methodology that joins the strengths of Cisco, our skilled network of partners, and our customers, we achieve the best results.
Feedback