Home / Shop
- Description
- Specifications
The NM-CEM-4SER is a Cisco network module with four serial ports for Circuit Emulation over IP (CEoIP). It fits the Cisco 2600XM series, 2691, 2811, 2821, 2851, 3660, 3700 series and 3800 series routers.
A CEoIP link needs a CEoIP network module at each end, either this module or the four-port T1/E1 NM-CEM-4TE1, and the two ends do not have to be the same type. CEoIP adds a requirement of 300 KB of flash memory and 1 MB of DRAM on top of the Cisco IOS software requirements.
Each port of the NM-CEM-4SER has its own options: dejitter buffer, payload compression and payload size. The idle pattern sent when a circuit goes down can run to 64 bits, entered as two 32-bit patterns, while the NM-CEM-4TE1 takes 8-bit patterns. CEoIP can use adaptive clocking to keep the clocks at the two endpoints in step, and payload compression and CAS transport for channelized voice are optional. Browse further network modules for Cisco routers in Cisco interface cards.
| Part number | NM-CEM-4SER |
| Type | 4-port serial CEoIP network module |
| Serial ports | 4 |
| Per-port options | dejitter buffer, payload compression, payload size |
| Idle pattern | up to 64 bits as two 32-bit patterns |
| Flash needed for CEoIP | 300 KB |
| DRAM needed for CEoIP | 1 MB |
| Clocking | adaptive clocking possible |
| Other CEoIP module | NM-CEM-4TE1 (4 ports, T1 or E1) |
| Compatible with | Cisco 2600XM series, 2691, 2811, 2821, 2851, 3660, 3700 series, 3800 series routers |